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Diffstat (limited to 'src/backend/access/htup.h')
-rw-r--r-- | src/backend/access/htup.h | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/src/backend/access/htup.h b/src/backend/access/htup.h deleted file mode 100644 index 7cf1ecf1762..00000000000 --- a/src/backend/access/htup.h +++ /dev/null @@ -1,115 +0,0 @@ -/*------------------------------------------------------------------------- - * - * htup.h-- - * POSTGRES heap tuple definitions. - * - * - * Copyright (c) 1994, Regents of the University of California - * - * $Id: htup.h,v 1.1.1.1 1996/07/09 06:21:08 scrappy Exp $ - * - *------------------------------------------------------------------------- - */ -#ifndef HTUP_H -#define HTUP_H - -#include "access/attnum.h" -#include "storage/bufpage.h" /* just to reduce levels of #include */ -#include "storage/itemptr.h" -#include "utils/nabstime.h" - -#define MinHeapTupleBitmapSize 32 /* 8 * 4 */ - -/* check these, they are likely to be more severely limited by t_hoff */ - -#define MaxHeapAttributeNumber 1600 /* 8 * 200 */ - -/* - * to avoid wasting space, the attributes should be layed out in such a - * way to reduce structure padding. - */ -typedef struct HeapTupleData { - - unsigned int t_len; /* length of entire tuple */ - - ItemPointerData t_ctid; /* current TID of this tuple */ - - ItemPointerData t_chain; /* replaced tuple TID */ - - Oid t_oid; /* OID of this tuple -- 4 bytes */ - - CommandId t_cmin; /* insert CID stamp -- 2 bytes each */ - CommandId t_cmax; /* delete CommandId stamp */ - - TransactionId t_xmin; /* insert XID stamp -- 4 bytes each */ - TransactionId t_xmax; /* delete XID stamp */ - - 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]; - /* bit map of domains */ - - /* MORE DATA FOLLOWS AT END OF STRUCT */ -} HeapTupleData; - -typedef HeapTupleData *HeapTuple; - - -#define SelfItemPointerAttributeNumber (-1) -#define ObjectIdAttributeNumber (-2) -#define MinTransactionIdAttributeNumber (-3) -#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) - - -/* ---------------- - * support macros - * ---------------- - */ -#define GETSTRUCT(TUP) (((char *)(TUP)) + ((HeapTuple)(TUP))->t_hoff) - - -/* - * BITMAPLEN(NATTS) - - * Computes minimum size of bitmap given number of domains. - */ -#define BITMAPLEN(NATTS) \ - ((((((int)(NATTS) - 1) >> 3) + 4 - (MinHeapTupleBitmapSize >> 3)) \ - & ~03) + (MinHeapTupleBitmapSize >> 3)) - -/* - * HeapTupleIsValid - * True iff the heap tuple is valid. - */ -#define HeapTupleIsValid(tuple) PointerIsValid(tuple) - -/* - * information stored in t_infomask: - */ -#define HEAP_HASNULL 0x01 /* has null attribute(s) */ -#define HEAP_HASVARLENA 0x02 /* has variable length attribute(s) */ - -#define HeapTupleNoNulls(tuple) \ - (!(((HeapTuple) (tuple))->t_infomask & HEAP_HASNULL)) - -#define HeapTupleAllFixed(tuple) \ - (!(((HeapTuple) (tuple))->t_infomask & HEAP_HASVARLENA)) - -#endif /* HTUP_H */ |