database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-25 13:17:41 +03:00
Code Activity

Fix problems with loss of tuple commit status bits during WAL redo of

Browse Source 
VACUUM FULL tuple moves.  Store full-width t_infomask in WAL, rather
than storing low 8 bits and expecting to be able to reconstruct upper
bits.  While at it, remove redundant t_oid field from WAL headers
(the OID, if present, is now recorded in the data portion of the tuple).
WAL version number bumped --- this does not force an initdb, you can
instead run pg_resetxlog after a clean shutdown of the old postmaster.
This commit is contained in:
Tom Lane
2002-09-26 22:46:29 +00:00
parent 72f8efdc98
commit c87469e64a
3 changed files with 41 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/include/access/htup.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: htup.h,v 1.60 2002/09/04 20:31:37 momjian Exp $
* $Id: htup.h,v 1.61 2002/09/26 22:46:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -261,6 +261,8 @@ do { \
/*
* WAL record definitions for heapam.c's WAL operations
*
* XLOG allows to store some information in high 4 bits of log
* record xl_info field
*/
@@ -300,15 +302,22 @@ typedef struct xl_heap_delete
#define SizeOfHeapDelete (offsetof(xl_heap_delete, target) + SizeOfHeapTid)
/*
* We don't store the whole fixed part (HeapTupleHeaderData) of an inserted
* or updated tuple in WAL; we can save a few bytes by reconstructing the
* fields that are available elsewhere in the WAL record, or perhaps just
* plain needn't be reconstructed. These are the fields we must store.
* NOTE: t_hoff could be recomputed, but we may as well store it because
* it will come for free due to alignment considerations.
*/
typedef struct xl_heap_header
{
Oid t_oid;
int16 t_natts;
uint16 t_infomask;
uint8 t_hoff;
uint8 mask; /* low 8 bits of t_infomask */
} xl_heap_header;
#define SizeOfHeapHeader (offsetof(xl_heap_header, mask) + sizeof(uint8))
#define SizeOfHeapHeader (offsetof(xl_heap_header, t_hoff) + sizeof(uint8))
/* This is what we need to know about insert */
typedef struct xl_heap_insert
@@ -340,6 +349,8 @@ typedef struct xl_heap_clean
#define SizeOfHeapClean (offsetof(xl_heap_clean, block) + sizeof(BlockNumber))
/*
* MaxTupleSize is the maximum allowed size of a tuple, including header and
* MAXALIGN alignment padding. Basically it's BLCKSZ minus the other stuff