blob: 130a80ae6d389c3cbca89c865c5d144f72e56d1e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*-------------------------------------------------------------------------
*
* scan.c--
* scan direction and key code
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/scankey.c,v 1.11 1998/01/15 19:41:46 pgsql Exp $
*
*-------------------------------------------------------------------------
*/
#include <postgres.h>
#include <fmgr.h>
#include <access/skey.h>
/*
* ScanKeyEntryIsLegal --
* True iff the scan key entry is legal.
*/
#define ScanKeyEntryIsLegal(entry) \
((bool) (AssertMacro(PointerIsValid(entry)) && \
AttributeNumberIsValid(entry->sk_attno)))
/*
* ScanKeyEntrySetIllegal --
* Marks a scan key entry as illegal.
*/
void
ScanKeyEntrySetIllegal(ScanKey entry)
{
Assert(PointerIsValid(entry));
entry->sk_flags = 0; /* just in case... */
entry->sk_attno = InvalidAttrNumber;
entry->sk_procedure = 0; /* should be InvalidRegProcedure */
}
/*
* ScanKeyEntryInitialize --
* Initializes an scan key entry.
*
* Note:
* Assumes the scan key entry is valid.
* Assumes the intialized scan key entry will be legal.
*/
void
ScanKeyEntryInitialize(ScanKey entry,
bits16 flags,
AttrNumber attributeNumber,
RegProcedure procedure,
Datum argument)
{
Assert(PointerIsValid(entry));
entry->sk_flags = flags;
entry->sk_attno = attributeNumber;
entry->sk_procedure = procedure;
entry->sk_argument = argument;
fmgr_info(procedure, &entry->sk_func);
entry->sk_nargs = entry->sk_func.fn_nargs;
Assert(ScanKeyEntryIsLegal(entry));
}
|
