This is part of https://github.com/elastic/elasticsearch/issues/30007. Considered text manipulating functions: - [x] ASCII - [x] BIT_LENGTH - [x] CHAR - [x] CHAR_LENGTH - [x] CONCAT - [x] INSERT - [x] LCASE - [x] LEFT - [x] LENGTH - [x] LOCATE - [x] LTRIM - [x] POSITION - [x] REPEAT - [x] REPLACE - [x] RIGHT - [x] RTRIM - [x] SPACE - [x] SUBSTRING - [x] UCASE
