elasticsearch/docs/reference/esql/functions/description/greatest.asciidoc

// This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.

*Description*

Returns the maximum value from multiple columns. This is similar to <<esql-mv_max>> except it is intended to run on multiple columns at once.

NOTE: When run on `keyword` or `text` fields, this returns the last string in alphabetical order. When run on `boolean` columns this will return `true` if any values are `true`.