diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/access/htup.h | 111 |
1 files changed, 83 insertions, 28 deletions
diff --git a/src/include/access/htup.h b/src/include/access/htup.h index 4860c4ec577..7806692f29a 100644 --- a/src/include/access/htup.h +++ b/src/include/access/htup.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: htup.h,v 1.52 2002/05/27 19:53:33 tgl Exp $ + * $Id: htup.h,v 1.53 2002/06/15 19:54:24 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -16,6 +16,7 @@ #include "storage/bufpage.h" #include "storage/relfilenode.h" +#include "access/transam.h" /* @@ -84,6 +85,87 @@ typedef struct HeapTupleHeaderData typedef HeapTupleHeaderData *HeapTupleHeader; /* + * information stored in t_infomask: + */ +#define HEAP_HASNULL 0x0001 /* has null attribute(s) */ +#define HEAP_HASVARLENA 0x0002 /* has variable length + * attribute(s) */ +#define HEAP_HASEXTERNAL 0x0004 /* has external stored + * attribute(s) */ +#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 */ +#define HEAP_XMAX_INVALID 0x0800 /* t_xmax invalid/aborted */ +#define HEAP_MARKED_FOR_UPDATE 0x1000 /* marked for UPDATE */ +#define HEAP_UPDATED 0x2000 /* this is UPDATEd version of row */ +#define HEAP_MOVED_OFF 0x4000 /* moved to another place by + * vacuum */ +#define HEAP_MOVED_IN 0x8000 /* moved from another place by + * vacuum */ + +#define HEAP_XACT_MASK 0xFFF0 /* visibility-related bits */ + + + +/* HeapTupleHeader accessor macros */ + +#define HeapTupleHeaderGetXmin(tup) \ + ((tup)->t_xmin) + +#define HeapTupleHeaderGetXmax(tup) \ + ((tup)->t_xmax) + +/* no AssertMacro, because this is read as a system-defined attribute also */ +#define HeapTupleHeaderGetCmin(tup) \ +( \ + (tup)->t_cmin \ +) + +#define HeapTupleHeaderGetCmax(tup) \ + ((tup)->t_cmax) + +#define HeapTupleHeaderGetXvac(tup) \ +( \ + AssertMacro((tup)->t_infomask & (HEAP_MOVED_IN | HEAP_MOVED_OFF)), \ + (TransactionId) (tup)->t_cmin \ +) + + +#define HeapTupleHeaderSetXmin(tup, xid) \ + (TransactionIdStore((xid), &(tup)->t_xmin)) + +#define HeapTupleHeaderSetXminInvalid(tup) \ + (StoreInvalidTransactionId(&(tup)->t_xmin)) + +#define HeapTupleHeaderSetXmax(tup, xid) \ + (TransactionIdStore((xid), &(tup)->t_xmax)) + +#define HeapTupleHeaderSetXmaxInvalid(tup) \ + (StoreInvalidTransactionId(&(tup)->t_xmax)) + +#define HeapTupleHeaderSetCmin(tup, cid) \ +( \ + AssertMacro(!((tup)->t_infomask & (HEAP_MOVED_IN | HEAP_MOVED_OFF))), \ + (tup)->t_cmin = (cid) \ +) + +#define HeapTupleHeaderSetCmax(tup, cid) \ + ((tup)->t_cmax = (cid)) + +#define HeapTupleHeaderSetXvac(tup, xid) \ +( \ + AssertMacro((tup)->t_infomask & (HEAP_MOVED_IN | HEAP_MOVED_OFF)), \ + TransactionIdStore((xid), (TransactionId *) &((tup)->t_cmin)) \ +) + + +/* * XLOG allows to store some information in high 4 bits of log * record xl_info field */ @@ -250,33 +332,6 @@ typedef HeapTupleData *HeapTuple; */ #define HeapTupleIsValid(tuple) PointerIsValid(tuple) -/* - * information stored in t_infomask: - */ -#define HEAP_HASNULL 0x0001 /* has null attribute(s) */ -#define HEAP_HASVARLENA 0x0002 /* has variable length - * attribute(s) */ -#define HEAP_HASEXTERNAL 0x0004 /* has external stored - * attribute(s) */ -#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 */ -#define HEAP_XMAX_INVALID 0x0800 /* t_xmax invalid/aborted */ -#define HEAP_MARKED_FOR_UPDATE 0x1000 /* marked for UPDATE */ -#define HEAP_UPDATED 0x2000 /* this is UPDATEd version of row */ -#define HEAP_MOVED_OFF 0x4000 /* moved to another place by - * vacuum */ -#define HEAP_MOVED_IN 0x8000 /* moved from another place by - * vacuum */ - -#define HEAP_XACT_MASK 0xFFF0 /* visibility-related bits */ - #define HeapTupleNoNulls(tuple) \ (!(((HeapTuple) (tuple))->t_data->t_infomask & HEAP_HASNULL)) |