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Update obsolete nbtree deletion comments.

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_bt_delitems_delete() is no longer the high-level entry point used by
index tuple deletion driven by index tuples whose LP_DEAD bits are set
(now called "simple index tuple deletion").  It became a lower level
routine that's only called by _bt_delitems_delete_check() following
commit d168b66682.
This commit is contained in:
Peter Geoghegan 2021-09-25 15:05:56 -07:00
parent c1a47dfe2e
commit ce2a860533
1 changed files with 2 additions and 2 deletions
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4
src/backend/access/nbtree/nbtpage.c
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@ -1197,7 +1197,7 @@ _bt_delitems_vacuum(Relation rel, Buffer buf,
*
* PageIndexTupleOverwrite() won't unset each item's LP_DEAD bit when it
* happens to already be set. It's important that we not interfere with
* _bt_delitems_delete().
* any future simple index tuple deletion operations.
*/
for (int i = 0; i < nupdatable; i++)
{
@ -1230,7 +1230,7 @@ _bt_delitems_vacuum(Relation rel, Buffer buf,
* This flag indicates the presence of LP_DEAD items on the page (though
* not reliably). Note that we only rely on it with pg_upgrade'd
* !heapkeyspace indexes. That's why clearing it here won't usually
* interfere with _bt_delitems_delete().
* interfere with simple index tuple deletion.
*/
opaque->btpo_flags &= ~BTP_HAS_GARBAGE;