elasticsearch/docs/reference/query-languages/esql/kibana/docs/functions/contains.md

% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.

CONTAINS

Returns a boolean that indicates whether a keyword substring is within another string. Returns null if either parameter is null.

ROW a = "hello"
| EVAL has_ll = CONTAINS(a, "ll")