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Postgres 18: fix 'column does not exist' errors in grouping regress tests. (#8199) 

DESCRIPTION: Fix 'column does not exist' errors in grouping regress
tests.

Postgres 18's GROUP RTE was being ignored by query pushdown planning
when constructing the query tree for the worker subquery. The solution
is straightforward - ensure the worker subquery tree has the same
groupRTE property as the original query. Postgres ruleutils then does
the right thing when generating the pushed down query. Fixes category 1
in #7992.
naisila/pg18_testing
Colm 2025-09-18 13:54:14 +01:00 committed by Naisila Puka
parent 10d62d50ea
commit d2ea4043d4
1 changed files with 3 additions and 1 deletions
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4
src/backend/distributed/planner/query_pushdown_planning.c
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@ -2029,7 +2029,9 @@ SubqueryPushdownMultiNodeTree(Query *originalQuery)
pushedDownQuery->setOperations = copyObject(queryTree->setOperations);
pushedDownQuery->querySource = queryTree->querySource;
pushedDownQuery->hasSubLinks = queryTree->hasSubLinks;
#if PG_VERSION_NUM >= PG_VERSION_18
pushedDownQuery->hasGroupRTE = queryTree->hasGroupRTE;
#endif
MultiTable *subqueryNode = MultiSubqueryPushdownTable(pushedDownQuery);
SetChild((MultiUnaryNode *) subqueryCollectNode, (MultiNode *) subqueryNode);