[SPARK-37369][SQL][FOLLOWUP] Override supportsRowBased in UnionExec #35061
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What changes were proposed in this pull request?
In PR #34642, we added a
supportsRowBasedinSparkPlanin order to avoidredundant
ColumnarToRowtransition inInMemoryTableScan. But, this optimizationalso applies to Union if its children both support row-based output.
So, this PR adds the
supportsRowBasedimplementation forUnionExec.Why are the changes needed?
followup PR
Does this PR introduce any user-facing change?
No
How was this patch tested?
Existing tests passed.