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Reset btpo.xact following recovery of btree delete page. Add btpo_xact

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field into WAL record and reset it from there, rather than using
FrozenTransactionId which can lead to some corner case bugs.

Problem report and suggested route to a fix from Heikki, details by me.
This commit is contained in:
Simon Riggs
2010-03-19 10:41:22 +00:00
parent 2827516394
commit 5c73ae17d1
3 changed files with 7 additions and 5 deletions
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5
src/include/access/nbtree.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.130 2010/02/26 02:01:21 momjian Exp $
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.131 2010/03/19 10:41:22 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@@ -375,7 +375,7 @@ typedef struct xl_btree_vacuum
* identifies the tuple removed from the parent page (note that we remove
* this tuple's downlink and the *following* tuple's key). Note we do not
* store any content for the deleted page --- it is just rewritten as empty
* during recovery.
* during recovery, apart from resetting the btpo.xact.
*/
typedef struct xl_btree_delete_page
{
@@ -383,6 +383,7 @@ typedef struct xl_btree_delete_page
BlockNumber deadblk; /* child block being deleted */
BlockNumber leftblk; /* child block's left sibling, if any */
BlockNumber rightblk; /* child block's right sibling */
TransactionId btpo_xact; /* value of btpo.xact for use in recovery */
/* xl_btree_metadata FOLLOWS IF XLOG_BTREE_DELETE_PAGE_META */
} xl_btree_delete_page;