Add a [SUBSTRING( str, pos [,len] )](https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_substring) udf.
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OllieJones commentedon Mar 16, 2023
We'll handle SUBSTRING and CHAR_LENGTH by rewriting them to SUBSTR and LENGTH respectively, rather than implementing udfs.
Merge pull request #22 from Automattic/fix-undefined-method-crash