Andrej G created SPARK-50692:
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Summary: Add RPAD pushdown support
Key: SPARK-50692
URL: https://issues.apache.org/jira/browse/SPARK-50692
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 3.5.4
Reporter: Andrej G
Make {{RPAD}} function translatable (via {{{}V2ExpressionBuilder{}}}) and it's
pushdown supported (via {{V2ExpressionSQLBuilder}} as a
{{{}visitSQLFunction{}}}).
h3. CONTEXT:
When trying to compare CHAR(...) and a literal, Spark injects a RPAD function
to make the CHAR parameter the same length. This behaviour is per ANSI standard.
h3. THE PROBLEM:
RPAD is not only an unsupported, but an untranslatable function. This prevents
CHAR + literal comparison pushdown.
h3. THE SOLUTION:
Support RPAD pushdowns and implement it when needed
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