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PG18: Fix missing Planning Fast Path Query DEBUG messages (#8320) 

With PG18's GROUP RTE, queries that should have been eligible for fast
path planning were skipped because the fast path planner allows exactly
one range table only. This fix extends that to account for a GROUP RTE.
pull/8300/head
Colm 2025-11-04 12:33:21 +00:00 committed by GitHub
parent 5a71f0d1ca
commit 7a7a0ba9c7
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2 changed files with 15 additions and 3 deletions
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12
src/backend/distributed/planner/fast_path_router_planner.c
View File

@ -273,8 +273,16 @@ FastPathRouterQuery(Query *query, FastPathRestrictionContext *fastPathContext)
return true;
}
/* make sure that the only range table in FROM clause */
if (list_length(query->rtable) != 1)
int numFromRels = list_length(query->rtable);
/* make sure that there is only one range table in FROM clause */
if ((numFromRels != 1)
#if PG_VERSION_NUM >= PG_VERSION_18
/* with a PG18+ twist for GROUP rte - if present make sure there's two range tables */
&& (!query->hasGroupRTE || numFromRels != 2)
#endif
)
{
return false;
}

6
src/backend/distributed/planner/multi_router_planner.c
View File

@ -2192,7 +2192,11 @@ CheckAndBuildDelayedFastPathPlan(DistributedPlanningContext *planContext,
static bool
ConvertToQueryOnShard(Query *query, Oid citusTableOid, Oid shardId)
{
Assert(list_length(query->rtable) == 1);
Assert(list_length(query->rtable) == 1
#if PG_VERSION_NUM >= PG_VERSION_18
|| (list_length(query->rtable) == 2 && query->hasGroupRTE)
#endif
);
RangeTblEntry *citusTableRte = (RangeTblEntry *) linitial(query->rtable);
Assert(citusTableRte->relid == citusTableOid);