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Btree WAL logging.

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This commit is contained in:
Vadim B. Mikheev
2000-10-04 00:04:43 +00:00
parent 831e78e0c4
commit 5800c6b9aa
4 changed files with 223 additions and 55 deletions
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47
src/backend/access/nbtree/nbtpage.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.37 2000/07/21 06:42:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.38 2000/10/04 00:04:42 vadim Exp $
*
* NOTES
* Postgres btree pages look like ordinary relation pages. The opaque
@@ -128,7 +128,7 @@ _bt_getroot(Relation rel, int access)
Page metapg;
BTPageOpaque metaopaque;
Buffer rootbuf;
Page rootpg;
Page rootpage;
BTPageOpaque rootopaque;
BlockNumber rootblkno;
BTMetaPageData *metad;
@@ -177,14 +177,31 @@ _bt_getroot(Relation rel, int access)
*/
rootbuf = _bt_getbuf(rel, P_NEW, BT_WRITE);
rootblkno = BufferGetBlockNumber(rootbuf);
rootpg = BufferGetPage(rootbuf);
rootpage = BufferGetPage(rootbuf);
/* NO ELOG(ERROR) till meta is updated */
_bt_pageinit(rootpage, BufferGetPageSize(rootbuf));
rootopaque = (BTPageOpaque) PageGetSpecialPointer(rootpage);
rootopaque->btpo_flags |= (BTP_LEAF | BTP_ROOT);
#ifdef XLOG
/* XLOG stuff */
{
xl_btree_insert xlrec;
xlrec.node = rel->rd_node;
XLogRecPtr recptr = XLogInsert(RM_BTREE_ID, XLOG_BTREE_NEWROOT,
&xlrec, SizeOfBtreeNewroot, NULL, 0);
PageSetLSN(rootpage, recptr);
PageSetSUI(rootpage, ThisStartUpID);
}
#endif
metad->btm_root = rootblkno;
metad->btm_level = 1;
_bt_pageinit(rootpg, BufferGetPageSize(rootbuf));
rootopaque = (BTPageOpaque) PageGetSpecialPointer(rootpg);
rootopaque->btpo_flags |= (BTP_LEAF | BTP_ROOT);
_bt_wrtnorelbuf(rel, rootbuf);
/* swap write lock for read lock */
@@ -218,8 +235,8 @@ _bt_getroot(Relation rel, int access)
* at the metadata page and got the root buffer, then we got the wrong
* buffer. Release it and try again.
*/
rootpg = BufferGetPage(rootbuf);
rootopaque = (BTPageOpaque) PageGetSpecialPointer(rootpg);
rootpage = BufferGetPage(rootbuf);
rootopaque = (BTPageOpaque) PageGetSpecialPointer(rootpage);
if (! P_ISROOT(rootopaque))
{
@@ -396,6 +413,20 @@ _bt_pagedel(Relation rel, ItemPointer tid)
buf = _bt_getbuf(rel, blkno, BT_WRITE);
page = BufferGetPage(buf);
#ifdef XLOG
/* XLOG stuff */
{
xl_btree_delete xlrec;
xlrec.target.node = rel->rd_node;
xlrec.target.tid = *tid;
XLogRecPtr recptr = XLogInsert(RM_BTREE_ID, XLOG_BTREE_DELETE,
(char*) xlrec, SizeOfBtreeDelete, NULL, 0);
PageSetLSN(page, recptr);
PageSetSUI(page, ThisStartUpID);
}
#endif
PageIndexTupleDelete(page, offno);
/* write the buffer and release the lock */