2 files changed, 2 insertions, 78 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c
index d833b23c47e..bd4e4ceeca5 100644
--- a/src/backend/optimizer/plan/planner.c
+++ b/src/backend/optimizer/plan/planner.c
@@ -6143,18 +6143,10 @@ plan_create_index_workers(Oid tableOid, Oid indexOid)
 	 * Currently, parallel workers can't access the leader's temporary tables.
 	 * Furthermore, any index predicate or index expressions must be parallel
 	 * safe.
-	 *
-	 * Fetch the list of expressions and predicates directly from the
-	 * catalogs.  Retrieving this information from the relcache would cause
-	 * the expressions and predicates to be flattened, losing properties that
-	 * can be important to check if parallel workers can be used.  For
-	 * example, immutable parallel-unsafe functions, that cannot be used in
-	 * parallel workers, would be changed to Const nodes, that are safe in
-	 * parallel workers.
 	 */
 	if (heap->rd_rel->relpersistence == RELPERSISTENCE_TEMP ||
-		!is_parallel_safe(root, (Node *) get_index_expressions(indexOid)) ||
-		!is_parallel_safe(root, (Node *) get_index_predicate(indexOid)))
+		!is_parallel_safe(root, (Node *) RelationGetIndexExpressions(index)) ||
+		!is_parallel_safe(root, (Node *) RelationGetIndexPredicate(index)))
 	{
 		parallel_workers = 0;
 		goto done;
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index 15a642e5c96..1b7e11b93e0 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -3511,74 +3511,6 @@ get_index_column_opclass(Oid index_oid, int attno)
 }
 
 /*
- * get_index_expressions
- *
- *		Given the index OID, its a List of its expressions or NIL if none.
- */
-List *
-get_index_expressions(Oid index_oid)
-{
-	List	   *result;
-	HeapTuple	tuple;
-	Datum		exprDatum;
-	bool		isnull;
-	char	   *exprString;
-
-	tuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(index_oid));
-	if (!HeapTupleIsValid(tuple))
-		elog(ERROR, "cache lookup failed for index %u", index_oid);
-
-	exprDatum = SysCacheGetAttr(INDEXRELID, tuple,
-								Anum_pg_index_indexprs, &isnull);
-	if (isnull)
-	{
-		ReleaseSysCache(tuple);
-		return NIL;
-	}
-
-	exprString = TextDatumGetCString(exprDatum);
-	result = (List *) stringToNode(exprString);
-	pfree(exprString);
-	ReleaseSysCache(tuple);
-
-	return result;
-}
-
-/*
- * get_index_predicate
- *
- *		Given the index OID, return a List of its predicate or NIL if none.
- */
-List *
-get_index_predicate(Oid index_oid)
-{
-	List	   *result;
-	HeapTuple	tuple;
-	Datum		predDatum;
-	bool		isnull;
-	char	   *predString;
-
-	tuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(index_oid));
-	if (!HeapTupleIsValid(tuple))
-		elog(ERROR, "cache lookup failed for index %u", index_oid);
-
-	predDatum = SysCacheGetAttr(INDEXRELID, tuple,
-								Anum_pg_index_indpred, &isnull);
-	if (isnull)
-	{
-		ReleaseSysCache(tuple);
-		return NIL;
-	}
-
-	predString = TextDatumGetCString(predDatum);
-	result = (List *) stringToNode(predString);
-	pfree(predString);
-	ReleaseSysCache(tuple);
-
-	return result;
-}
-
-/*
  * get_index_isreplident
  *
  *		Given the index OID, return pg_index.indisreplident.