From bfcb3c63fd070c30cc7b2c0748dfb1cdd74c5906 Mon Sep 17 00:00:00 2001
From: Mehmet Yilmaz <mehmetyilmaz@microsoft.com>
Date: Fri, 27 Jun 2025 09:20:46 +0000
Subject: [PATCH] add RTE_GROUP to the non-complex whitelist for PG 18.
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A synthetic RTE_GROUP is harmless; treating it as “complex” flips the flag and prevents a router plan.
---
 src/backend/distributed/planner/multi_logical_planner.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/backend/distributed/planner/multi_logical_planner.c b/src/backend/distributed/planner/multi_logical_planner.c
index d1e2e6bca..cb7c87371 100644
--- a/src/backend/distributed/planner/multi_logical_planner.c
+++ b/src/backend/distributed/planner/multi_logical_planner.c
@@ -1180,6 +1180,9 @@ HasComplexRangeTableType(Query *queryTree)
 			rangeTableEntry->rtekind != RTE_SUBQUERY &&
 			rangeTableEntry->rtekind != RTE_FUNCTION &&
 			rangeTableEntry->rtekind != RTE_VALUES &&
+#if PG_VERSION_NUM >= PG_VERSION_18
+    		rangeTableEntry->rtekind != RTE_GROUP   &&
+#endif			
 			!IsJsonTableRTE(rangeTableEntry))
 		{
 			hasComplexRangeTableType = true;