[SPARK-50704][SQL] Support more pushdown functions for MySQL connector #49335
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What changes were proposed in this pull request?
This PR tries to implement more pushdown functions for MySQL connector.
Why are the changes needed?
There are Spark SQL functions having the same function signature and similar semantic in MySQL. This PR tries to support these SQL functions in pushdown and added integration tests to make sure it works for valid types.
Does this PR introduce any user-facing change?
'No'
How was this patch tested?
Integration tests added.
Was this patch authored or co-authored using generative AI tooling?
'No'