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Add nbtree page deletion assertion.

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Add a documenting assertion that's similar to the nearby assertion added
by commit cd8c73a3.  This conveys that the entire call to _bt_pagedel()
does no work if it isn't possible to get a descent stack for the initial
scanblkno page.
This commit is contained in:
Peter Geoghegan
2020-08-03 13:04:42 -07:00
parent 9e496768b8
commit a451b7d442
1 changed files with 1 additions and 0 deletions
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src/backend/access/nbtree/nbtpage.c
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@ -1697,6 +1697,7 @@ _bt_pagedel(Relation rel, Buffer leafbuf, TransactionId *oldestBtpoXact)
if (_bt_leftsib_splitflag(rel, leftsib, leafblkno)) if (_bt_leftsib_splitflag(rel, leftsib, leafblkno))
{ {
ReleaseBuffer(leafbuf); ReleaseBuffer(leafbuf);
Assert(ndeleted == 0);
return ndeleted; return ndeleted;
} }