skey.h
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:1k
- /*-------------------------------------------------------------------------
- *
- * skey.h
- * POSTGRES scan key definitions.
- *
- *
- * Copyright (c) 1994, Regents of the University of California
- *
- * $Id: skey.h,v 1.11.2.1 1999/07/30 18:26:59 scrappy Exp $
- *
- *
- * Note:
- * Needs more accessor/assignment routines.
- *-------------------------------------------------------------------------
- */
- #ifndef SKEY_H
- #define SKEY_H
- #include "access/attnum.h"
- #include "fmgr.h"
- typedef struct ScanKeyData
- {
- bits16 sk_flags; /* flags */
- AttrNumber sk_attno; /* domain number */
- RegProcedure sk_procedure; /* procedure OID */
- FmgrInfo sk_func;
- int32 sk_nargs;
- Datum sk_argument; /* data to compare */
- } ScanKeyData;
- typedef ScanKeyData *ScanKey;
- #define SK_ISNULL 0x1
- #define SK_UNARY 0x2
- #define SK_NEGATE 0x4
- #define SK_COMMUTE 0x8
- #define ScanUnmarked 0x01
- #define ScanUncheckedPrevious 0x02
- #define ScanUncheckedNext 0x04
- /*
- * prototypes for functions in access/common/scankey.c
- */
- extern void ScanKeyEntrySetIllegal(ScanKey entry);
- extern void ScanKeyEntryInitialize(ScanKey entry, bits16 flags,
- AttrNumber attributeNumber, RegProcedure procedure, Datum argument);
- #endif /* SKEY_H */