diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtinsert.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtinsert.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c index 62746c47219..68628ec000d 100644 --- a/src/backend/access/nbtree/nbtinsert.c +++ b/src/backend/access/nbtree/nbtinsert.c @@ -398,9 +398,9 @@ _bt_search_insert(Relation rel, BTInsertState insertstate) * _bt_findinsertloc() to reuse most of the binary search work we do * here. * - * Do not call here when there are NULL values in scan key. NULL should be - * considered unequal to NULL when checking for duplicates, but we are not - * prepared to handle that correctly. + * This code treats NULLs as equal, unlike the default semantics for unique + * indexes. So do not call here when there are NULL values in scan key and + * the index uses the default NULLS DISTINCT mode. */ static TransactionId _bt_check_unique(Relation rel, BTInsertState insertstate, Relation heapRel, |