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/*-------------------------------------------------------------------------
*
* skey.h--
* POSTGRES scan key definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: skey.h,v 1.4 1997/09/07 04:56:13 momjian Exp $
*
*
* Note:
* Needs more accessor/assignment routines.
*-------------------------------------------------------------------------
*/
#ifndef SKEY_H
#define SKEY_H
#include <access/attnum.h>
typedef struct ScanKeyData
{
bits16 sk_flags; /* flags */
AttrNumber sk_attno; /* domain number */
RegProcedure sk_procedure; /* procedure OID */
func_ptr 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 */
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