[fix](nereids)Fix decompose repeat nest rewrite need to derive stats after construct cteProducer#60811
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run buildall |
TPC-H: Total hot run time: 28882 ms |
TPC-DS: Total hot run time: 184265 ms |
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run p0 |
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TPC-H: Total hot run time: 28879 ms |
TPC-DS: Total hot run time: 184131 ms |
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run external |
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What problem does this PR solve?
Reproduction SQL:
Error:
java.lang.IllegalArgumentException: Stats for CTE: CTEId#0 not foundIssue Number: close #xxx
Related PR: #xxx
Problem Summary:
Root cause:
This SQL triggers DecomposeRepeatWithPreAggregation twice: first for the inner LogicalAggregate, then for the outer LogicalAggregate.
When rewriting the inner aggregate, a CTE structure is created (CTEAnchor, CTEProducer, CTEConsumer).
When rewriting the outer aggregate, choosePreAggShuffleKeyPartitionExprs calls StatsDerive to derive statistics for the current subtree.
At that point, the child of the outer LogicalAggregate is only the consumer subtree; the producer subtree is not part of the plan being visited.
StatsDerive.visitLogicalCTEConsumer looks up producer statistics by CTEId, but the producer was never derived in this context, so the lookup fails with Stats for CTE: CTEId#0 not found.
How to fix:
In DecomposeRepeatWithPreAggregation.constructProducer(), derive statistics for the CTE producer when it is created. This ensures producer stats are stored in the context before the consumer is later visited. When StatsDerive visits LogicalCTEConsumer during the outer rewrite, it can find the producer stats correctly.
Release note
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Behavior changed:
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