diff options
Diffstat (limited to 'src/include/access/htup.h')
| -rw-r--r-- | src/include/access/htup.h | 69 |
1 files changed, 68 insertions, 1 deletions
diff --git a/src/include/access/htup.h b/src/include/access/htup.h index 784c5051a93..ff514092160 100644 --- a/src/include/access/htup.h +++ b/src/include/access/htup.h @@ -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 1.29 2000/04/12 17:16:26 momjian Exp $ + * $Id: htup.h,v 1.30 2000/06/02 10:20:26 vadim Exp $ * *------------------------------------------------------------------------- */ @@ -44,6 +44,8 @@ typedef struct HeapTupleHeaderData uint8 t_hoff; /* sizeof tuple header */ + /* ^ - 31 bytes - ^ */ + bits8 t_bits[MinHeapTupleBitmapSize / 8]; /* bit map of domains */ @@ -52,6 +54,71 @@ typedef struct HeapTupleHeaderData typedef HeapTupleHeaderData *HeapTupleHeader; + +#ifdef XLOG + +/* XLOG stuff */ + +/* + * XLOG allows to store some information in high 4 bits of log + * record xl_info field + */ +#define XLOG_HEAP_INSERT 0x00 +#define XLOG_HEAP_DELETE 0x10 +#define XLOG_HEAP_UPDATE 0x20 +#define XLOG_HEAP_MOVE 0x30 + +/* + * All what we need to find changed tuple (14 bytes) + */ +typedef struct xl_heaptid +{ + Oid dbId; /* database */ + Oid relId; /* relation */ + ItemPointerData tid; /* changed tuple id */ +} xl_heaptid; + +/* This is what we need to know about delete - ALIGN(14) = 16 bytes */ +typedef struct xl_heap_delete +{ + xl_heaptid dtid; /* deleted tuple id */ +} xl_heap_delete; + +/* This is what we need to know about insert - 22 + data */ +typedef struct xl_heap_insert +{ + xl_heaptid itid; /* inserted tuple id */ + /* something from tuple header */ + int16 t_natts; + Oid t_oid; + uint8 t_hoff; + uint8 mask; /* low 8 bits of t_infomask */ + /* TUPLE DATA FOLLOWS AT END OF 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 */ + /* something from header of new tuple version */ + int16 t_natts; + uint8 t_hoff; + uint8 mask; /* low 8 bits of t_infomask */ + /* NEW TUPLE DATA FOLLOWS AT END OF STRUCT */ +} xl_heap_update; + +/* This is what we need to know about tuple move - ALIGN(20) = 24 bytes */ +typedef struct xl_heap_move +{ + xl_heaptid ftid; /* moved from */ + ItemPointerData ttid; /* moved to */ +} xl_heap_move; + +/* end of XLOG stuff */ + +#endif /* XLOG */ + #define MinTupleSize (MAXALIGN(sizeof (PageHeaderData)) + \ MAXALIGN(sizeof(HeapTupleHeaderData)) + \ MAXALIGN(sizeof(char))) |