5 files changed, 12 insertions, 14 deletions
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index 26f3b2cd7a4..663407c65d3 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -1219,7 +1219,7 @@ DefineIndex(Oid relationId,
 
 				tup = SearchSysCache1(INDEXRELID,
 									  ObjectIdGetDatum(indexRelationId));
-				if (!tup)
+				if (!HeapTupleIsValid(tup))
 					elog(ERROR, "cache lookup failed for index %u",
 						 indexRelationId);
 				newtup = heap_copytuple(tup);
diff --git a/src/backend/commands/opclasscmds.c b/src/backend/commands/opclasscmds.c
index 5d73848a8b9..b8c7b9657f7 100644
--- a/src/backend/commands/opclasscmds.c
+++ b/src/backend/commands/opclasscmds.c
@@ -1071,7 +1071,7 @@ assignOperTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
 
 	/* Fetch the operator definition */
 	optup = SearchSysCache1(OPEROID, ObjectIdGetDatum(member->object));
-	if (optup == NULL)
+	if (!HeapTupleIsValid(optup))
 		elog(ERROR, "cache lookup failed for operator %u", member->object);
 	opform = (Form_pg_operator) GETSTRUCT(optup);
 
@@ -1137,7 +1137,7 @@ assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid)
 
 	/* Fetch the procedure definition */
 	proctup = SearchSysCache1(PROCOID, ObjectIdGetDatum(member->object));
-	if (proctup == NULL)
+	if (!HeapTupleIsValid(proctup))
 		elog(ERROR, "cache lookup failed for function %u", member->object);
 	procform = (Form_pg_proc) GETSTRUCT(proctup);
 
diff --git a/src/backend/commands/operatorcmds.c b/src/backend/commands/operatorcmds.c
index 7b98e4b910c..17f54410a00 100644
--- a/src/backend/commands/operatorcmds.c
+++ b/src/backend/commands/operatorcmds.c
@@ -407,7 +407,7 @@ AlterOperator(AlterOperatorStmt *stmt)
 	oprId = LookupOperWithArgs(stmt->opername, false);
 	catalog = table_open(OperatorRelationId, RowExclusiveLock);
 	tup = SearchSysCacheCopy1(OPEROID, ObjectIdGetDatum(oprId));
-	if (tup == NULL)
+	if (!HeapTupleIsValid(tup))
 		elog(ERROR, "cache lookup failed for operator %u", oprId);
 	oprForm = (Form_pg_operator) GETSTRUCT(tup);
 
diff --git a/src/backend/commands/statscmds.c b/src/backend/commands/statscmds.c
index 790593b1ab3..a191916d032 100644
--- a/src/backend/commands/statscmds.c
+++ b/src/backend/commands/statscmds.c
@@ -461,7 +461,7 @@ UpdateStatisticsForTypeChange(Oid statsOid, Oid relationOid, int attnum,
 	bool		replaces[Natts_pg_statistic_ext];
 
 	oldtup = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(statsOid));
-	if (!oldtup)
+	if (!HeapTupleIsValid(oldtup))
 		elog(ERROR, "cache lookup failed for statistics object %u", statsOid);
 
 	/*
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index f6c9cf3b0ec..8e4743d1101 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8606,7 +8606,7 @@ CloneFkReferencing(List **wqueue, Relation parentRel, Relation partRel)
 		ListCell   *cell;
 
 		tuple = SearchSysCache1(CONSTROID, parentConstrOid);
-		if (!tuple)
+		if (!HeapTupleIsValid(tuple))
 			elog(ERROR, "cache lookup failed for constraint %u",
 				 parentConstrOid);
 		constrForm = (Form_pg_constraint) GETSTRUCT(tuple);
@@ -8785,7 +8785,7 @@ tryAttachPartitionForeignKey(ForeignKeyCacheInfo *fk,
 
 	parentConstrTup = SearchSysCache1(CONSTROID,
 									  ObjectIdGetDatum(parentConstrOid));
-	if (!parentConstrTup)
+	if (!HeapTupleIsValid(parentConstrTup))
 		elog(ERROR, "cache lookup failed for constraint %u", parentConstrOid);
 	parentConstr = (Form_pg_constraint) GETSTRUCT(parentConstrTup);
 
@@ -8816,9 +8816,8 @@ tryAttachPartitionForeignKey(ForeignKeyCacheInfo *fk,
 	 */
 	partcontup = SearchSysCache1(CONSTROID,
 								 ObjectIdGetDatum(fk->conoid));
-	if (!partcontup)
-		elog(ERROR, "cache lookup failed for constraint %u",
-			 fk->conoid);
+	if (!HeapTupleIsValid(partcontup))
+		elog(ERROR, "cache lookup failed for constraint %u", fk->conoid);
 	partConstr = (Form_pg_constraint) GETSTRUCT(partcontup);
 	if (OidIsValid(partConstr->conparentid) ||
 		!partConstr->convalidated ||
@@ -16001,7 +16000,7 @@ ATExecDetachPartition(Relation rel, RangeVar *name)
 		Constraint *fkconstraint;
 
 		contup = SearchSysCache1(CONSTROID, ObjectIdGetDatum(fk->conoid));
-		if (!contup)
+		if (!HeapTupleIsValid(contup))
 			elog(ERROR, "cache lookup failed for constraint %u", fk->conoid);
 		conform = (Form_pg_constraint) GETSTRUCT(contup);
 
@@ -16346,9 +16345,8 @@ validatePartitionedIndex(Relation partedIdx, Relation partedTbl)
 
 		indTup = SearchSysCache1(INDEXRELID,
 								 ObjectIdGetDatum(inhForm->inhrelid));
-		if (!indTup)
-			elog(ERROR, "cache lookup failed for index %u",
-				 inhForm->inhrelid);
+		if (!HeapTupleIsValid(indTup))
+			elog(ERROR, "cache lookup failed for index %u", inhForm->inhrelid);
 		indexForm = (Form_pg_index) GETSTRUCT(indTup);
 		if (indexForm->indisvalid)
 			tuples += 1;