diff options
Diffstat (limited to 'src/backend/optimizer/plan/planner.c')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index 443ab08d75a..d1552fb5eab 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -6667,10 +6667,18 @@ 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 *) RelationGetIndexExpressions(index)) || - !is_parallel_safe(root, (Node *) RelationGetIndexPredicate(index))) + !is_parallel_safe(root, (Node *) get_index_expressions(indexOid)) || + !is_parallel_safe(root, (Node *) get_index_predicate(indexOid))) { parallel_workers = 0; goto done; |