diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/nbtree/nbtutils.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c index 54afa6f4176..bbe2fe4bce5 100644 --- a/src/backend/access/nbtree/nbtutils.c +++ b/src/backend/access/nbtree/nbtutils.c @@ -2205,7 +2205,8 @@ _bt_truncate(Relation rel, IndexTuple lastleft, IndexTuple firstright, { IndexTuple tidpivot; - pivot = index_truncate_tuple(itupdesc, firstright, keepnatts); + pivot = index_truncate_tuple(itupdesc, firstright, + Min(keepnatts, nkeyatts)); if (BTreeTupleIsPosting(pivot)) { @@ -2250,6 +2251,10 @@ _bt_truncate(Relation rel, IndexTuple lastleft, IndexTuple firstright, /* * No truncation was possible, since key attributes are all equal. * It's necessary to add a heap TID attribute to the new pivot tuple. + * + * This path is only taken when rel is not an INCLUDE index. It + * avoids a second palloc0() by avoiding the index_truncate_tuple() + * call completely. */ Assert(natts == nkeyatts); newsize = IndexTupleSize(firstright) + MAXALIGN(sizeof(ItemPointerData)); |