Remove redundent Shared Scan after dedup subquery #1460
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After subquery dedup(ref. a031a4a), The cte consumer need to decrement, so that XformInlineCTE can help us rid of unnecessary Shared Scan node. TODO: 1. Instead of mock CTE MDID, we should parser CTE related relation MDID, and dedup CTE with other flat subquery together. 2. inner join subquery, join order should not involve into dedup comparation 3. For subquery, not only AndOp but also OrOp can dedup
yjhjstz
reviewed
Dec 1, 2025
| void | ||
| Decrement() | ||
| { | ||
| GPOS_ASSERT(m_ulCount > 1); |
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why GPOS_ASSERT(m_ulCount > 1);?
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After subquery dedup(ref. a031a4a), The cte consumer need to decrement, so that XformInlineCTE can help us rid of unnecessary Shared Scan node.
TODO:
Fixes #ISSUE_Number
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Breaking Changes
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make installcheckmake -C src/test installcheck-cbdb-parallelImpact
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