ES|QL string functions ES|QL supports these string functions: BIT_LENGTH BYTE_LENGTH CHUNK CONCAT CONTAINS ENDS_WITH FROM_BASE64 HASH JSON_EXTRACT LEFT LENGTH LOCATE LTRIM MD5 REPEAT REPLACE REVERSE RIGHT RTRIM SHA1 SHA256 SPACE SPLIT STARTS_WITH SUBSTRING TO_BASE64 TO_LOWER TO_UPPER TRIM URL_DECODE URL_ENCODE URL_ENCODE_COMPONENT