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

Good Bye, Time Travel!

Browse Source
This commit is contained in:
Vadim B. Mikheev
1997-11-02 15:27:14 +00:00
parent 6cc0a00dec
commit 32cd09ac6d
36 changed files with 265 additions and 1841 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
src/include/access/htup.h
View File

@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: htup.h,v 1.6 1997/09/08 21:50:46 momjian Exp $
* $Id: htup.h,v 1.7 1997/11/02 15:26:42 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -28,33 +28,25 @@
*/
typedef struct HeapTupleData
{
unsigned int t_len; /* length of entire tuple */
unsigned int t_len; /* length of entire tuple */
Oid t_oid; /* OID of this tuple -- 4 bytes */
ItemPointerData t_ctid; /* current TID of this tuple */
CommandId t_cmin; /* insert CID stamp -- 4 bytes each */
CommandId t_cmax; /* delete CommandId stamp */
ItemPointerData t_chain; /* replaced tuple TID */
TransactionId t_xmin; /* insert XID stamp -- 4 bytes each */
TransactionId t_xmax; /* delete XID stamp */
Oid t_oid; /* OID of this tuple -- 4 bytes */
ItemPointerData t_ctid; /* current TID of this tuple */
int16 t_natts; /* number of attributes */
CommandId t_cmin; /* insert CID stamp -- 2 bytes each */
CommandId t_cmax; /* delete CommandId stamp */
uint16 t_infomask; /* various infos */
TransactionId t_xmin; /* insert XID stamp -- 4 bytes each */
TransactionId t_xmax; /* delete XID stamp */
uint8 t_hoff; /* sizeof tuple header */
AbsoluteTime t_tmin; /* time stamps -- 4 bytes each */
AbsoluteTime t_tmax;
int16 t_natts; /* number of attributes */
char t_vtype; /* not used - padding */
char t_infomask; /* whether tuple as null or variable
* length attributes */
uint8 t_hoff; /* sizeof tuple header */
bits8 t_bits[MinHeapTupleBitmapSize / 8];
bits8 t_bits[MinHeapTupleBitmapSize / 8];
/* bit map of domains */
/* MORE DATA FOLLOWS AT END OF STRUCT */
@@ -69,12 +61,7 @@ typedef HeapTupleData *HeapTuple;
#define MinCommandIdAttributeNumber (-4)
#define MaxTransactionIdAttributeNumber (-5)
#define MaxCommandIdAttributeNumber (-6)
#define ChainItemPointerAttributeNumber (-7)
#define AnchorItemPointerAttributeNumber (-8)
#define MinAbsoluteTimeAttributeNumber (-9)
#define MaxAbsoluteTimeAttributeNumber (-10)
#define VersionTypeAttributeNumber (-11)
#define FirstLowInvalidHeapAttributeNumber (-12)
#define FirstLowInvalidHeapAttributeNumber (-7)
/* ----------------
@@ -101,9 +88,15 @@ typedef HeapTupleData *HeapTuple;
/*
* information stored in t_infomask:
*/
#define HEAP_HASNULL 0x01 /* has null attribute(s) */
#define HEAP_HASVARLENA 0x02 /* has variable length
#define HEAP_HASNULL 0x0001 /* has null attribute(s) */
#define HEAP_HASVARLENA 0x0002 /* has variable length
* attribute(s) */
#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 */
#define HEAP_XMAX_INVALID 0x0800 /* t_xmax invalid/aborted */
#define HEAP_XACT_MASK 0x0F00 /* */
#define HeapTupleNoNulls(tuple) \
(!(((HeapTuple) (tuple))->t_infomask & HEAP_HASNULL))