diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/util/plancat.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c index f4b7343dace..d950bd93002 100644 --- a/src/backend/optimizer/util/plancat.c +++ b/src/backend/optimizer/util/plancat.c @@ -789,6 +789,11 @@ find_relation_notnullatts(PlannerInfo *root, Oid relid) * the purposes of inference. If no opclass (or collation) is specified, then * all matching indexes (that may or may not match the default in terms of * each attribute opclass/collation) are used for inference. + * + * Note: during index CONCURRENTLY operations, different transactions may + * reference different sets of arbiter indexes. This can lead to false unique + * constraint violations that wouldn't occur during normal operations. For + * more information, see insert.sgml. */ List * infer_arbiter_indexes(PlannerInfo *root) |