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Remove the no-longer-useful BTItem/BTItemData level of structure, and

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just refer to btree index entries as plain IndexTuples, which is what
they have been for a very long time.  This is mostly just an exercise
in removing extraneous notation, but it does save a palloc/pfree cycle
per index insertion.
This commit is contained in:
Tom Lane
2006-01-25 23:04:21 +00:00
parent 9b012311f8
commit c389760c32
8 changed files with 180 additions and 263 deletions
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30
src/backend/access/nbtree/nbtutils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtutils.c,v 1.70 2006/01/25 20:29:23 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtutils.c,v 1.71 2006/01/25 23:04:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -139,30 +139,6 @@ _bt_freestack(BTStack stack)
}
}
/*
* Construct a BTItem from a plain IndexTuple.
*
* This is now useless code, since a BTItem *is* an index tuple with
* no extra stuff. We hang onto it for the moment to preserve the
* notational distinction, in case we want to add some extra stuff
* again someday.
*/
BTItem
_bt_formitem(IndexTuple itup)
{
int nbytes_btitem;
BTItem btitem;
Size tuplen;
/* make a copy of the index tuple with room for extra stuff */
tuplen = IndexTupleSize(itup);
nbytes_btitem = tuplen + (sizeof(BTItemData) - sizeof(IndexTupleData));
btitem = (BTItem) palloc(nbytes_btitem);
memcpy((char *) &(btitem->bti_itup), (char *) itup, tuplen);
return btitem;
}
/*----------
* _bt_preprocess_keys() -- Preprocess scan keys
@ -589,7 +565,6 @@ _bt_checkkeys(IndexScanDesc scan,
{
ItemId iid = PageGetItemId(page, offnum);
bool tuple_valid;
BTItem btitem;
IndexTuple tuple;
TupleDesc tupdesc;
BTScanOpaque so;
@ -631,8 +606,7 @@ _bt_checkkeys(IndexScanDesc scan,
else
tuple_valid = true;
btitem = (BTItem) PageGetItem(page, iid);
tuple = &btitem->bti_itup;
tuple = (IndexTuple) PageGetItem(page, iid);
IncrIndexProcessed();