diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/nbtree/nbtdedup.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/backend/access/nbtree/nbtdedup.c b/src/backend/access/nbtree/nbtdedup.c index 854e3b2cf9a..271994b08df 100644 --- a/src/backend/access/nbtree/nbtdedup.c +++ b/src/backend/access/nbtree/nbtdedup.c @@ -1024,7 +1024,19 @@ _bt_swap_posting(IndexTuple newitem, IndexTuple oposting, int postingoff) nhtids = BTreeTupleGetNPosting(oposting); Assert(_bt_posting_valid(oposting)); - Assert(postingoff > 0 && postingoff < nhtids); + + /* + * The postingoff argument originated as a _bt_binsrch_posting() return + * value. It will be 0 in the event of corruption that makes a leaf page + * contain a non-pivot tuple that's somehow identical to newitem (no two + * non-pivot tuples should ever have the same TID). This has been known + * to happen in the field from time to time. + * + * Perform a basic sanity check to catch this case now. + */ + if (!(postingoff > 0 && postingoff < nhtids)) + elog(ERROR, "posting list tuple with %d items cannot be split at offset %d", + nhtids, postingoff); /* * Move item pointers in posting list to make a gap for the new item's |