[SPARK-31206][SQL] AQE should not use the same SubqueryExec when reuse is off #27971
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
What changes were proposed in this pull request?
Make it always compile a Subquery(even with the same
exprId) inInsertAdaptiveSparkPlan. buildSubqueryMapwhen reuse subquery is off.Why are the changes needed?
Currently, in
InsertAdaptiveSparkPlan. buildSubqueryMap, it will skip compiling a subquery when it has sameexprIdwith a compiled subquery. And this leads to use the sameSubqueryExecfor theSubqueryExpressionwith the sameexprId. Thus, the behavior here is not consistent compare toPlanSubquerieswithout AQE.Here's an example for the issue(please note the difference of subquery plan #id):
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Added a test.