diff options
Diffstat (limited to 'src/backend/utils/cache/relmapper.c')
| -rw-r--r-- | src/backend/utils/cache/relmapper.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/backend/utils/cache/relmapper.c b/src/backend/utils/cache/relmapper.c index 99d095f2df3..e3a5e4e386e 100644 --- a/src/backend/utils/cache/relmapper.c +++ b/src/backend/utils/cache/relmapper.c @@ -263,13 +263,17 @@ RelationMapUpdateMap(Oid relationId, Oid fileNode, bool shared, else { /* - * We don't currently support map changes within subtransactions. This - * could be done with more bookkeeping infrastructure, but it doesn't - * presently seem worth it. + * We don't currently support map changes within subtransactions, and + * parallel workers must avoid relying on mapping state, since it + * isn't propagated from the leader. This could be done with more + * bookkeeping infrastructure, but it doesn't presently seem worth it. */ if (GetCurrentTransactionNestLevel() > 1) elog(ERROR, "cannot change relation mapping within subtransaction"); + if (IsInParallelMode()) + elog(ERROR, "cannot change relation mapping in parallel mode"); + if (immediate) { /* Make it active, but only locally */ |