Unhandled some operator in MySQLConnector.js

[anilaxes]

In MySQLConnector.js, find_in_set operator is not handled inside operatorsign and createSingleCondition functions.

Attaching handled code in attachment.
MySQLConnector.txt

[darshit-shah]

Thanks for pointing it out. I need to check the possibility of find_in_set in all supported databases like MySQL, MSSQL, ClickHouse, RedShift, and Cassandra because the JSON structure is common for all databases. Once it is done, I will add support to the repository.