diff options
Diffstat (limited to 'src/include/access/htup.h')
| -rw-r--r-- | src/include/access/htup.h | 51 |
1 files changed, 22 insertions, 29 deletions
diff --git a/src/include/access/htup.h b/src/include/access/htup.h index 0b6653f386..72fb5a8d31 100644 --- a/src/include/access/htup.h +++ b/src/include/access/htup.h @@ -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)) |