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Heap redo/undo (except for tuple moving used by vacuum).

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This commit is contained in:
Vadim B. Mikheev
2000-09-07 09:58:38 +00:00
parent c18c321365
commit f2bfe8a24c
7 changed files with 497 additions and 89 deletions
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23
src/include/access/htup.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: htup.h,v 1.34 2000/08/07 20:15:40 tgl Exp $
* $Id: htup.h,v 1.35 2000/09/07 09:58:35 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -15,6 +15,7 @@
#define HTUP_H
#include "storage/bufpage.h"
#include "storage/relfilenode.h"
#define MinHeapTupleBitmapSize 32 /* 8 * 4 */
@@ -81,8 +82,7 @@ typedef HeapTupleHeaderData *HeapTupleHeader;
*/
typedef struct xl_heaptid
{
Oid dbId; /* database */
Oid relId; /* relation */
RelFileNode node;
CommandId cid; /* this is for "better" tuple' */
/* identification - it allows to avoid */
/* "compensation" records for undo */
@@ -92,7 +92,7 @@ typedef struct xl_heaptid
/* This is what we need to know about delete - ALIGN(18) = 24 bytes */
typedef struct xl_heap_delete
{
xl_heaptid dtid; /* deleted tuple id */
xl_heaptid target; /* deleted tuple id */
} xl_heap_delete;
#define SizeOfHeapDelete (offsetof(xl_heaptid, tid) + SizeOfIptrData))
@@ -100,7 +100,7 @@ typedef struct xl_heap_delete
/* This is what we need to know about insert - 26 + data */
typedef struct xl_heap_insert
{
xl_heaptid itid; /* inserted tuple id */
xl_heaptid target; /* inserted tuple id */
/* something from tuple header */
int16 t_natts;
Oid t_oid;
@@ -114,8 +114,8 @@ typedef struct xl_heap_insert
/* This is what we need to know about update - 28 + data */
typedef struct xl_heap_update
{
xl_heaptid dtid; /* deleted tuple id */
ItemPointerData itid; /* new inserted tuple id */
xl_heaptid target; /* deleted tuple id */
ItemPointerData newtid; /* new inserted tuple id */
/* something from header of new tuple version */
int16 t_natts;
uint8 t_hoff;
@@ -128,8 +128,8 @@ typedef struct xl_heap_update
/* This is what we need to know about tuple move - 24 bytes */
typedef struct xl_heap_move
{
xl_heaptid ftid; /* moved from */
ItemPointerData ttid; /* moved to */
xl_heaptid target; /* moved from */
ItemPointerData newtid; /* moved to */
} xl_heap_move;
#define SizeOfHeapMove (offsetof(xl_heap_move, ttid) + SizeOfIptrData))
@@ -238,6 +238,9 @@ typedef HeapTupleData *HeapTuple;
#define HEAP_HASCOMPRESSED 0x0008 /* has compressed stored */
/* attribute(s) */
#define HEAP_HASEXTENDED 0x000C /* the two above combined */
#define HEAP_XMAX_UNLOGGED 0x0080 /* to lock tuple for update */
/* without logging */
#define HEAP_XMIN_COMMITTED 0x0100 /* t_xmin committed */
#define HEAP_XMIN_INVALID 0x0200 /* t_xmin invalid/aborted */
#define HEAP_XMAX_COMMITTED 0x0400 /* t_xmax committed */
@@ -249,7 +252,7 @@ typedef HeapTupleData *HeapTuple;
#define HEAP_MOVED_IN 0x8000 /* moved from another place by
* vacuum */
#define HEAP_XACT_MASK 0xFF00 /* */
#define HEAP_XACT_MASK 0xFFF0 /* */
#define HeapTupleNoNulls(tuple) \
(!(((HeapTuple) (tuple))->t_data->t_infomask & HEAP_HASNULL))