ESQL: Generate kibana inline docs (#106782)

This takes a stab at generating the markdown files that Kibana uses for
its inline help. It doesn't include all of the examples because the
`@Example` annotation is not filled in - we're tracking that in
https://github.com/elastic/elasticsearch/issues/104247#issuecomment-2018944371

There are some links in the output and they are in markdown syntax. We
should figure out how to make them work for kibana.

docs/reference/esql/functions/README.md

@@ -5,6 +5,8 @@ The files in these subdirectories are generated by ESQL's test suite:
 * `signature` - railroad diagram of the syntax to invoke each function
 * `types` - a table of each combination of support type for each parameter. These are generated from tests.
 * `layout` - a fully generated description for each function
+* `kibana/definition` - function definitions for kibana's ESQL editor
+* `kibana/docs` - the inline docs for kibana
 
 Most functions can use the generated docs generated in the `layout` directory.
 If we need something more custom for the function we can make a file in this

docs/reference/esql/functions/kibana/definition/abs.json

@@ -0,0 +1,60 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "abs",
+  "description" : "Returns the absolute value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ],
+  "examples" : [
+    "ROW number = -1.0 \n| EVAL abs_number = ABS(number)",
+    "FROM employees\n| KEEP first_name, last_name, height\n| EVAL abs_height = ABS(0.0 - height)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/acos.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "acos",
+  "description" : "Returns the arccosine of `n` as an angle, expressed in radians.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=.9\n| EVAL acos=ACOS(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/asin.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "asin",
+  "description" : "Returns the arcsine of the input\nnumeric expression as an angle, expressed in radians.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Number between -1 and 1. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=.9\n| EVAL asin=ASIN(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/atan.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "atan",
+  "description" : "Returns the arctangent of the input\nnumeric expression as an angle, expressed in radians.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=12.9\n| EVAL atan=ATAN(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/atan2.json

@@ -0,0 +1,299 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "atan2",
+  "description" : "The angle between the positive x-axis and the ray from the\norigin to the point (x , y) in the Cartesian plane, expressed in radians.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "double",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "y_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "y coordinate. If `null`, the function returns `null`."
+        },
+        {
+          "name" : "x_coordinate",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "x coordinate. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW y=12.9, x=.6\n| EVAL atan2=ATAN2(y, x)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/auto_bucket.json

@@ -0,0 +1,1088 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "auto_bucket",
+  "description" : "Creates human-friendly buckets and returns a datetime value\nfor each row that corresponds to the resulting bucket the row falls into.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
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+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
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+          "type" : "text",
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+          "description" : ""
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+          "description" : ""
+        }
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+      "returnType" : "datetime"
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+        }
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+        }
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
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+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
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+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
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+      "returnType" : "double"
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+    {
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+          "description" : ""
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
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+          "description" : ""
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+          "optional" : false,
+          "description" : ""
+        }
+      ],
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+      "returnType" : "double"
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+          "description" : ""
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
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+          "optional" : false,
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
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+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
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+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
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+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
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+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
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+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
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+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
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+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
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+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "buckets",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "from",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "to",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/case.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "case",
+  "description" : "Accepts pairs of conditions and values.\nThe function returns the value that belongs to the first condition that evaluates to true.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "condition",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "trueValue",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "falseValue",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/ceil.json

@@ -0,0 +1,60 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "ceil",
+  "description" : "Round a number up to the nearest integer.",
+  "note" : "This is a noop for `long` (including unsigned) and `integer`. For `double` this picks the closest `double` value to the integer similar to Math.ceil.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8\n| EVAL a=CEIL(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/coalesce.json

@@ -0,0 +1,161 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "coalesce",
+  "description" : "Returns the first of its arguments that is not null. If all arguments are null, it returns `null`.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        },
+        {
+          "name" : "rest",
+          "type" : "boolean",
+          "optional" : true,
+          "description" : "Other expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        },
+        {
+          "name" : "rest",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Other expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        },
+        {
+          "name" : "rest",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "Other expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        },
+        {
+          "name" : "rest",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Other expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : "Expression to evaluate"
+        },
+        {
+          "name" : "rest",
+          "type" : "text",
+          "optional" : true,
+          "description" : "Other expression to evaluate"
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    }
+  ],
+  "examples" : [
+    "ROW a=null, b=\"b\"\n| EVAL COALESCE(a, b)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/concat.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "concat",
+  "description" : "Concatenates two or more strings.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string1",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "string2",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string1",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "string2",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/cos.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "cos",
+  "description" : "Returns the cosine of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL cos=COS(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/cosh.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "cosh",
+  "description" : "Returns the hyperbolic cosine of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL cosh=COSH(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/date_diff.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "date_diff",
+  "description" : "Subtract 2 dates and return their difference in multiples of a unit specified in the 1st argument",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "unit",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A valid date unit"
+        },
+        {
+          "name" : "startTimestamp",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A string representing a start timestamp"
+        },
+        {
+          "name" : "endTimestamp",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A string representing an end timestamp"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "unit",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A valid date unit"
+        },
+        {
+          "name" : "startTimestamp",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A string representing a start timestamp"
+        },
+        {
+          "name" : "endTimestamp",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A string representing an end timestamp"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/date_extract.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "date_extract",
+  "description" : "Extracts parts of a date, like year, month, day, hour.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "datePart",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "Part of the date to extract. Can be: aligned_day_of_week_in_month; aligned_day_of_week_in_year; aligned_week_of_month; aligned_week_of_year; ampm_of_day; clock_hour_of_ampm; clock_hour_of_day; day_of_month; day_of_week; day_of_year; epoch_day; era; hour_of_ampm; hour_of_day; instant_seconds; micro_of_day; micro_of_second; milli_of_day; milli_of_second; minute_of_day; minute_of_hour; month_of_year; nano_of_day; nano_of_second; offset_seconds; proleptic_month; second_of_day; second_of_minute; year; or year_of_era."
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "datePart",
+          "type" : "text",
+          "optional" : false,
+          "description" : "Part of the date to extract. Can be: aligned_day_of_week_in_month; aligned_day_of_week_in_year; aligned_week_of_month; aligned_week_of_year; ampm_of_day; clock_hour_of_ampm; clock_hour_of_day; day_of_month; day_of_week; day_of_year; epoch_day; era; hour_of_ampm; hour_of_day; instant_seconds; micro_of_day; micro_of_second; milli_of_day; milli_of_second; minute_of_day; minute_of_hour; month_of_year; nano_of_day; nano_of_second; offset_seconds; proleptic_month; second_of_day; second_of_minute; year; or year_of_era."
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/date_format.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "date_format",
+  "description" : "Returns a string representation of a date, in the provided format.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "dateFormat",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "A valid date pattern"
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "dateFormat",
+          "type" : "text",
+          "optional" : true,
+          "description" : "A valid date pattern"
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/date_parse.json

@@ -0,0 +1,62 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "date_parse",
+  "description" : "Parses a string into a date value",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "datePattern",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "A valid date pattern"
+        },
+        {
+          "name" : "dateString",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A string representing a date"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "datePattern",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "A valid date pattern"
+        },
+        {
+          "name" : "dateString",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A string representing a date"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "datePattern",
+          "type" : "text",
+          "optional" : true,
+          "description" : "A valid date pattern"
+        },
+        {
+          "name" : "dateString",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A string representing a date"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/date_trunc.json

@@ -0,0 +1,49 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "date_trunc",
+  "description" : "Rounds down a date to the closest interval.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "interval",
+          "type" : "date_period",
+          "optional" : false,
+          "description" : "Interval; expressed using the timespan literal syntax."
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "interval",
+          "type" : "time_duration",
+          "optional" : false,
+          "description" : "Interval; expressed using the timespan literal syntax."
+        },
+        {
+          "name" : "date",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "Date expression"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    }
+  ],
+  "examples" : [
+    "FROM employees\n| KEEP first_name, last_name, hire_date\n| EVAL year_hired = DATE_TRUNC(1 year, hire_date)",
+    "FROM employees\n| EVAL year = DATE_TRUNC(1 year, hire_date)\n| STATS hires = COUNT(emp_no) BY year\n| SORT year",
+    "FROM sample_data\n| EVAL error = CASE(message LIKE \"*error*\", 1, 0)\n| EVAL hour = DATE_TRUNC(1 hour, @timestamp)\n| STATS error_rate = AVG(error) by hour\n| SORT hour"
+  ]
+}

docs/reference/esql/functions/kibana/definition/e.json

@@ -0,0 +1,12 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "e",
+  "description" : "Euler’s number.",
+  "signatures" : [
+    {
+      "params" : [ ],
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/ends_with.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "ends_with",
+  "description" : "Returns a boolean that indicates whether a keyword string ends with another string",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "suffix",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "suffix",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/floor.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "floor",
+  "description" : "Round a number down to the nearest integer.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/greatest.json

@@ -0,0 +1,212 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "greatest",
+  "description" : "Returns the maximum value from many columns.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "boolean",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "double",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "integer",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "ip",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "long",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "text",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "version",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/least.json

@@ -0,0 +1,212 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "least",
+  "description" : "Returns the minimum value from many columns.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "boolean",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "double",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "integer",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "ip",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "long",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "text",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "first",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "rest",
+          "type" : "version",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : true,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/left.json

@@ -0,0 +1,47 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "left",
+  "description" : "Returns the substring that extracts 'length' chars from 'string' starting from the left.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "The string from which to return a substring."
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "The number of characters to return."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "The string from which to return a substring."
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "The number of characters to return."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ],
+  "examples" : [
+    "FROM employees\n| KEEP last_name\n| EVAL left = LEFT(last_name, 3)\n| SORT last_name ASC\n| LIMIT 5"
+  ]
+}

docs/reference/esql/functions/kibana/definition/length.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "length",
+  "description" : "Returns the character length of a string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/locate.json

@@ -0,0 +1,176 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "locate",
+  "description" : "Returns an integer that indicates the position of a keyword substring within another string",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "The start index"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "The start index"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "The start index"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "An input string"
+        },
+        {
+          "name" : "substring",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A substring to locate in the input string"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "The start index"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/log.json

@@ -0,0 +1,348 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "log",
+  "description" : "Returns the logarithm of a value to a base. The input can be any numeric value, the return value is always a double.\n\nLogs of zero, negative numbers, and base of one return `null` as well as a warning.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : true,
+          "description" : "Base of logarithm. If `null`, the function returns `null`. If not provided, this function returns the natural logarithm (base e) of a value."
+        },
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW base = 2.0, value = 8.0\n| EVAL s = LOG(base, value)",
+    "row value = 100\n| EVAL s = LOG(value);"
+  ]
+}

docs/reference/esql/functions/kibana/definition/log10.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "log10",
+  "description" : "Returns the logarithm of a value to base 10. The input can be any numeric value, the return value is always a double.\n\nLogs of 0 and negative numbers return `null` as well as a warning.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW d = 1000.0 \n| EVAL s = LOG10(d)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/ltrim.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "ltrim",
+  "description" : "Removes leading whitespaces from a string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_avg.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_avg",
+  "description" : "Converts a multivalued field into a single valued field containing the average of all of the values.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_concat.json

@@ -0,0 +1,80 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_concat",
+  "description" : "Reduce a multivalued string field to a single valued field by concatenating all values.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "values to join"
+        },
+        {
+          "name" : "delim",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "values to join"
+        },
+        {
+          "name" : "delim",
+          "type" : "text",
+          "optional" : false,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "values to join"
+        },
+        {
+          "name" : "delim",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : "values to join"
+        },
+        {
+          "name" : "delim",
+          "type" : "text",
+          "optional" : false,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_count.json

@@ -0,0 +1,176 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_count",
+  "description" : "Reduce a multivalued field to a single valued field containing the count of values.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_dedupe.json

@@ -0,0 +1,116 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_dedupe",
+  "description" : "Remove duplicate values from a multivalued field.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_first.json

@@ -0,0 +1,176 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_first",
+  "description" : "Reduce a multivalued field to a single valued field containing the first value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_last.json

@@ -0,0 +1,176 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_last",
+  "description" : "Reduce a multivalued field to a single valued field containing the last value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_max.json

@@ -0,0 +1,128 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_max",
+  "description" : "Reduce a multivalued field to a single valued field containing the maximum value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_median.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_median",
+  "description" : "Converts a multivalued field into a single valued field containing the median value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_min.json

@@ -0,0 +1,128 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_min",
+  "description" : "Reduce a multivalued field to a single valued field containing the minimum value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_slice.json

@@ -0,0 +1,320 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_slice",
+  "description" : "Returns a subset of the multivalued field using the start and end index values.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "start index"
+        },
+        {
+          "name" : "end",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "end index (included)"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_sort.json

@@ -0,0 +1,170 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_sort",
+  "description" : "Sorts a multivalued field in lexicographical order.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "order",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "sort order"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_sum.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_sum",
+  "description" : "Converts a multivalued field into a single valued field containing the sum of all of the values.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/mv_zip.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "mv_zip",
+  "description" : "Combines the values from two multivalued fields with a delimiter that joins them together.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string1",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "string2",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "delim",
+          "type" : "keyword",
+          "optional" : true,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string1",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "string2",
+          "type" : "text",
+          "optional" : false,
+          "description" : "A multivalued field"
+        },
+        {
+          "name" : "delim",
+          "type" : "text",
+          "optional" : true,
+          "description" : "delimiter"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/pi.json

@@ -0,0 +1,12 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "pi",
+  "description" : "The ratio of a circle’s circumference to its diameter.",
+  "signatures" : [
+    {
+      "params" : [ ],
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/pow.json

@@ -0,0 +1,296 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "pow",
+  "description" : "Returns the value of a base raised to the power of an exponent.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "base",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "exponent",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/replace.json

@@ -0,0 +1,200 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "replace",
+  "description" : "The function substitutes in the string any match of the regular expression with the replacement string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "regex",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "newString",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/right.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "right",
+  "description" : "Return the substring that extracts length chars from the string starting from the right.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/round.json

@@ -0,0 +1,26 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "round",
+  "description" : "Rounds a number to the closest number with the specified number of digits.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "The numeric value to round"
+        },
+        {
+          "name" : "decimals",
+          "type" : "integer",
+          "optional" : true,
+          "description" : "The number of decimal places to round to. Defaults to 0."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/rtrim.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "rtrim",
+  "description" : "Removes trailing whitespaces from a string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/signum.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "signum",
+  "description" : "Returns the sign of the given number.\nIt returns `-1` for negative numbers, `0` for `0` and `1` for positive numbers.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "Numeric expression. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW d = 100.0\n| EVAL s = SIGNUM(d)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/sin.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "sin",
+  "description" : "Returns ths Sine trigonometric function of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL sin=SIN(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/sinh.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "sinh",
+  "description" : "Returns the hyperbolic sine of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL sinh=SINH(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/split.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "split",
+  "description" : "Split a single valued string into multiple strings.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "delim",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "delim",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/sqrt.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "sqrt",
+  "description" : "Returns the square root of a number.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_contains.json

@@ -0,0 +1,155 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_contains",
+  "description" : "Returns whether the first geometry contains the second geometry.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ],
+  "examples" : [
+    "FROM airport_city_boundaries\n| WHERE ST_CONTAINS(city_boundary, TO_GEOSHAPE(\"POLYGON((109.35 18.3, 109.45 18.3, 109.45 18.4, 109.35 18.4, 109.35 18.3))\"))\n| KEEP abbrev, airport, region, city, city_location"
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_disjoint.json

@@ -0,0 +1,155 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_disjoint",
+  "description" : "Returns whether the two geometries or geometry columns are disjoint.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ],
+  "examples" : [
+    "FROM airport_city_boundaries\n| WHERE ST_DISJOINT(city_boundary, TO_GEOSHAPE(\"POLYGON((-10 -60, 120 -60, 120 60, -10 60, -10 -60))\"))\n| KEEP abbrev, airport, region, city, city_location"
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_intersects.json

@@ -0,0 +1,155 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_intersects",
+  "description" : "Returns whether the two geometries or geometry columns intersect.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ],
+  "examples" : [
+    "FROM airports\n| WHERE ST_INTERSECTS(location, TO_GEOSHAPE(\"POLYGON((42 14, 43 14, 43 15, 42 15, 42 14))\"))"
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_within.json

@@ -0,0 +1,155 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_within",
+  "description" : "Returns whether the first geometry is within the second geometry.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "geomA",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        },
+        {
+          "name" : "geomB",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : "Geometry column name or variable of geometry type"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ],
+  "examples" : [
+    "FROM airport_city_boundaries\n| WHERE ST_WITHIN(city_boundary, TO_GEOSHAPE(\"POLYGON((109.1 18.15, 109.6 18.15, 109.6 18.65, 109.1 18.65, 109.1 18.15))\"))\n| KEEP abbrev, airport, region, city, city_location"
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_x.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_x",
+  "description" : "Extracts the x-coordinate from a point geometry.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "point",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "point",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/st_y.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "st_y",
+  "description" : "Extracts the y-coordinate from a point geometry.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "point",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "point",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/starts_with.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "starts_with",
+  "description" : "Returns a boolean that indicates whether a keyword string starts with another string",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "prefix",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "prefix",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/substring.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "substring",
+  "description" : "Returns a substring of a string, specified by a start position and an optional length",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "start",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        },
+        {
+          "name" : "length",
+          "type" : "integer",
+          "optional" : true,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/tan.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "tan",
+  "description" : "Returns the Tangent trigonometric function of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL tan=TAN(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/tanh.json

@@ -0,0 +1,59 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "tanh",
+  "description" : "Returns the Tangent hyperbolic function of an angle.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "double",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "integer",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "angle",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : "An angle, in radians. If `null`, the function returns `null`."
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ],
+  "examples" : [
+    "ROW a=1.8 \n| EVAL tanh=TANH(a)"
+  ]
+}

docs/reference/esql/functions/kibana/definition/tau.json

@@ -0,0 +1,12 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "tau",
+  "description" : "The ratio of a circle’s circumference to its radius.",
+  "signatures" : [
+    {
+      "params" : [ ],
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_boolean.json

@@ -0,0 +1,92 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_boolean",
+  "description" : "Converts an input value to a boolean value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "boolean"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_cartesianpoint.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_cartesianpoint",
+  "description" : "Converts an input value to a point value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_point"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_cartesianshape.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_cartesianshape",
+  "description" : "Converts an input value to a shape value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "cartesian_shape"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_datetime.json

@@ -0,0 +1,92 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_datetime",
+  "description" : "Converts an input value to a date value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "datetime"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_degrees.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_degrees",
+  "description" : "Converts a number in radians to degrees.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_double.json

@@ -0,0 +1,104 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_double",
+  "description" : "Converts an input value to a double value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_geopoint.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_geopoint",
+  "description" : "Converts an input value to a geo_point value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_point"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_geoshape.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_geoshape",
+  "description" : "Converts an input value to a geo_shape value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "geo_shape"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_integer.json

@@ -0,0 +1,104 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_integer",
+  "description" : "Converts an input value to an integer value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "integer"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_ip.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_ip",
+  "description" : "Converts an input string to an IP value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "ip"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_long.json

@@ -0,0 +1,104 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_long",
+  "description" : "Converts an input value to a long value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_lower.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_lower",
+  "description" : "Returns a new string representing the input string converted to lower case.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "The input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "text",
+          "optional" : false,
+          "description" : "The input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_radians.json

@@ -0,0 +1,56 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_radians",
+  "description" : "Converts a number in degrees to radians.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    },
+    {
+      "params" : [
+        {
+          "name" : "number",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "double"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_string.json

@@ -0,0 +1,176 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_string",
+  "description" : "Converts a field into a string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "cartesian_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_point",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "geo_shape",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "ip",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_unsigned_long.json

@@ -0,0 +1,104 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_unsigned_long",
+  "description" : "Converts an input value to an unsigned long value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "boolean",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "datetime",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "double",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "integer",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "unsigned_long",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "unsigned_long"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_upper.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_upper",
+  "description" : "Returns a new string representing the input string converted to upper case.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : "The input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "str",
+          "type" : "text",
+          "optional" : false,
+          "description" : "The input string"
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/to_version.json

@@ -0,0 +1,44 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "to_version",
+  "description" : "Converts an input string to a version value.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    },
+    {
+      "params" : [
+        {
+          "name" : "field",
+          "type" : "version",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "version"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/definition/trim.json

@@ -0,0 +1,32 @@
+{
+  "comment" : "This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.",
+  "type" : "eval",
+  "name" : "trim",
+  "description" : "Removes leading and trailing whitespaces from a string.",
+  "signatures" : [
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "keyword",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "keyword"
+    },
+    {
+      "params" : [
+        {
+          "name" : "string",
+          "type" : "text",
+          "optional" : false,
+          "description" : ""
+        }
+      ],
+      "variadic" : false,
+      "returnType" : "text"
+    }
+  ]
+}

docs/reference/esql/functions/kibana/docs/abs.md

@@ -0,0 +1,11 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### ABS
+Returns the absolute value.
+
+```
+ROW number = -1.0 
+| EVAL abs_number = ABS(number)
+```

docs/reference/esql/functions/kibana/docs/acos.md

@@ -0,0 +1,11 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### ACOS
+Returns the {wikipedia}/Inverse_trigonometric_functions[arccosine] of `n` as an angle, expressed in radians.
+
+```
+ROW a=.9
+| EVAL acos=ACOS(a)
+```

docs/reference/esql/functions/kibana/docs/asin.md

@@ -0,0 +1,12 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### ASIN
+Returns the {wikipedia}/Inverse_trigonometric_functions[arcsine] of the input
+numeric expression as an angle, expressed in radians.
+
+```
+ROW a=.9
+| EVAL asin=ASIN(a)
+```

docs/reference/esql/functions/kibana/docs/atan.md

@@ -0,0 +1,12 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### ATAN
+Returns the {wikipedia}/Inverse_trigonometric_functions[arctangent] of the input
+numeric expression as an angle, expressed in radians.
+
+```
+ROW a=12.9
+| EVAL atan=ATAN(a)
+```

docs/reference/esql/functions/kibana/docs/atan2.md

@@ -0,0 +1,12 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### ATAN2
+The {wikipedia}/Atan2[angle] between the positive x-axis and the ray from the
+origin to the point (x , y) in the Cartesian plane, expressed in radians.
+
+```
+ROW y=12.9, x=.6
+| EVAL atan2=ATAN2(y, x)
+```

docs/reference/esql/functions/kibana/docs/auto_bucket.md

@@ -0,0 +1,8 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### AUTO_BUCKET
+Creates human-friendly buckets and returns a datetime value
+for each row that corresponds to the resulting bucket the row falls into.
+

docs/reference/esql/functions/kibana/docs/case.md

@@ -0,0 +1,8 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### CASE
+Accepts pairs of conditions and values.
+The function returns the value that belongs to the first condition that evaluates to true.
+

docs/reference/esql/functions/kibana/docs/ceil.md

@@ -0,0 +1,12 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### CEIL
+Round a number up to the nearest integer.
+
+```
+ROW a=1.8
+| EVAL a=CEIL(a)
+```
+Note: This is a noop for `long` (including unsigned) and `integer`. For `double` this picks the closest `double` value to the integer similar to {javadoc}/java.base/java/lang/Math.html#ceil(double)[Math.ceil].

docs/reference/esql/functions/kibana/docs/coalesce.md

@@ -0,0 +1,11 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### COALESCE
+Returns the first of its arguments that is not null. If all arguments are null, it returns `null`.
+
+```
+ROW a=null, b="b"
+| EVAL COALESCE(a, b)
+```

docs/reference/esql/functions/kibana/docs/concat.md

@@ -0,0 +1,7 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### CONCAT
+Concatenates two or more strings.
+

docs/reference/esql/functions/kibana/docs/cos.md

@@ -0,0 +1,11 @@
+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### COS
+Returns the {wikipedia}/Sine_and_cosine[cosine] of an angle.
+
+```
+ROW a=1.8 
+| EVAL cos=COS(a)
+```

docs/reference/esql/functions/kibana/docs/cosh.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### COSH
+Returns the {wikipedia}/Hyperbolic_functions[hyperbolic cosine] of an angle.
+
+```
+ROW a=1.8 
+| EVAL cosh=COSH(a)
+```

docs/reference/esql/functions/kibana/docs/date_diff.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### DATE_DIFF
+Subtract 2 dates and return their difference in multiples of a unit specified in the 1st argument
+

docs/reference/esql/functions/kibana/docs/date_extract.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### DATE_EXTRACT
+Extracts parts of a date, like year, month, day, hour.
+

docs/reference/esql/functions/kibana/docs/date_format.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### DATE_FORMAT
+Returns a string representation of a date, in the provided format.
+

docs/reference/esql/functions/kibana/docs/date_parse.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### DATE_PARSE
+Parses a string into a date value
+

docs/reference/esql/functions/kibana/docs/date_trunc.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### DATE_TRUNC
+Rounds down a date to the closest interval.
+
+```
+FROM employees
+| KEEP first_name, last_name, hire_date
+| EVAL year_hired = DATE_TRUNC(1 year, hire_date)
+```

docs/reference/esql/functions/kibana/docs/e.md

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+<!--
+This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
+-->
+
+### E
+Euler’s number.
+