From 26cb175b08961a968171ba79c8f57cd2a1665301 Mon Sep 17 00:00:00 2001
From: Teodor Sigaev <teodor@sigaev.ru>
Date: Mon, 3 Aug 2026 17:33:24 +0300
Subject: [PATCH] Fix support RTE_RELATION

Andey Bille & Vlada Pogozhelskaya
---
 expected/plantuner.out |  7 +++++++
 plantuner.c            | 37 +++++++++++++++++++++++--------------
 sql/plantuner.sql      |  3 +++
 3 files changed, 33 insertions(+), 14 deletions(-)

diff --git a/expected/plantuner.out b/expected/plantuner.out
index 70d2bca..7bba940 100644
--- a/expected/plantuner.out
+++ b/expected/plantuner.out
@@ -94,3 +94,10 @@ EXPLAIN (COSTS OFF) SELECT * FROM wow WHERE i = 0;
    Index Cond: (i = 0)
 (2 rows)
 
+SELECT 1 AS one;
+ one 
+-----
+   1
+(1 row)
+
+RESET ALL;
diff --git a/plantuner.c b/plantuner.c
index d31dbbb..b1c1e54 100644
--- a/plantuner.c
+++ b/plantuner.c
@@ -417,24 +417,33 @@ execPlantuner(PlannerInfo *root, Oid relationObjectId, bool inhparent,
 			  RelOptInfo *rel)
 {
 #endif
-	Relation	relation;
-
-	relation = heap_open(relationObjectId, NoLock);
-	if (relation->rd_rel->relkind == RELKIND_RELATION)
+#if PG_VERSION_NUM >= 190000
+	if (rte->rtekind == RTE_RELATION &&
+		rte->relkind == RELKIND_RELATION)
+#endif
 	{
-		if (fix_empty_table && RelationGetNumberOfBlocks(relation) == 0)
+		Relation	relation;
+
+#if PG_VERSION_NUM >= 190000
+		Assert(OidIsValid(relationObjectId));
+#endif
+		relation = heap_open(relationObjectId, NoLock);
+		if (relation->rd_rel->relkind == RELKIND_RELATION)
 		{
-			/*
-			 * estimate_rel_size() could be too pessimistic for particular
-			 * workload
-			 */
-			rel->pages = 1.0;
-			rel->tuples = 0.0;
-		}
+			if (fix_empty_table && RelationGetNumberOfBlocks(relation) == 0)
+			{
+				/*
+				 * estimate_rel_size() could be too pessimistic for particular
+				 * workload
+				 */
+				rel->pages = 1.0;
+				rel->tuples = 0.0;
+			}
 
-		indexFilter(root, relationObjectId, inhparent, rel);
+			indexFilter(root, relationObjectId, inhparent, rel);
+		}
+		heap_close(relation, NoLock);
 	}
-	heap_close(relation, NoLock);
 
 	/*
 	 * Call next hook if it exists
diff --git a/sql/plantuner.sql b/sql/plantuner.sql
index ddd6fcc..759938e 100644
--- a/sql/plantuner.sql
+++ b/sql/plantuner.sql
@@ -49,3 +49,6 @@ EXPLAIN (COSTS OFF) SELECT * FROM wow WHERE i = 0;
 
 RESET plantuner.only_index;
 EXPLAIN (COSTS OFF) SELECT * FROM wow WHERE i = 0;
+
+SELECT 1 AS one;
+RESET ALL;
-- 
2.49.0