database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

24
src/backend/access/nbtree/nbtxlog.c
View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtxlog.c,v 1.24 2005/10/18 01:06:23 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtxlog.c,v 1.25 2006/01/25 23:04:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -57,7 +57,7 @@ forget_matching_split(Relation reln, RelFileNode node,
{
Buffer buffer;
Page page;
BTItem btitem;
IndexTuple itup;
BlockNumber rightblk;
ListCell *l;
@ -66,9 +66,9 @@ forget_matching_split(Relation reln, RelFileNode node,
if (!BufferIsValid(buffer))
elog(PANIC, "forget_matching_split: block unfound");
page = (Page) BufferGetPage(buffer);
btitem = (BTItem) PageGetItem(page, PageGetItemId(page, offnum));
rightblk = ItemPointerGetBlockNumber(&(btitem->bti_itup.t_tid));
Assert(ItemPointerGetOffsetNumber(&(btitem->bti_itup.t_tid)) == P_HIKEY);
itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, offnum));
rightblk = ItemPointerGetBlockNumber(&(itup->t_tid));
Assert(ItemPointerGetOffsetNumber(&(itup->t_tid)) == P_HIKEY);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
@ -90,15 +90,15 @@ forget_matching_split(Relation reln, RelFileNode node,
static void
_bt_restore_page(Page page, char *from, int len)
{
BTItemData btdata;
IndexTupleData itupdata;
Size itemsz;
char *end = from + len;
for (; from < end;)
{
memcpy(&btdata, from, sizeof(BTItemData));
itemsz = IndexTupleDSize(btdata.bti_itup) +
(sizeof(BTItemData) - sizeof(IndexTupleData));
/* Need to copy tuple header due to alignment considerations */
memcpy(&itupdata, from, sizeof(IndexTupleData));
itemsz = IndexTupleDSize(itupdata);
itemsz = MAXALIGN(itemsz);
if (PageAddItem(page, (Item) from, itemsz,
FirstOffsetNumber, LP_USED) == InvalidOffsetNumber)
@ -431,12 +431,12 @@ btree_xlog_delete_page(bool ismeta,
else
{
ItemId itemid;
BTItem btitem;
IndexTuple itup;
OffsetNumber nextoffset;
itemid = PageGetItemId(page, poffset);
btitem = (BTItem) PageGetItem(page, itemid);
ItemPointerSet(&(btitem->bti_itup.t_tid), rightsib, P_HIKEY);
itup = (IndexTuple) PageGetItem(page, itemid);
ItemPointerSet(&(itup->t_tid), rightsib, P_HIKEY);
nextoffset = OffsetNumberNext(poffset);
PageIndexTupleDelete(page, nextoffset);
}