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| Current File : //compat/linux/proc/self/root/usr/local/include/postgresql/server/access/valid.h |
/*-------------------------------------------------------------------------
*
* valid.h
* POSTGRES tuple qualification validity definitions.
*
*
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/valid.h,v 1.40 2008/01/01 19:45:56 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef VALID_H
#define VALID_H
/*
* HeapKeyTest
*
* Test a heap tuple to see if it satisfies a scan key.
*/
#define HeapKeyTest(tuple, \
tupdesc, \
nkeys, \
keys, \
result) \
do \
{ \
/* Use underscores to protect the variables passed in as parameters */ \
int __cur_nkeys = (nkeys); \
ScanKey __cur_keys = (keys); \
\
(result) = true; /* may change */ \
for (; __cur_nkeys--; __cur_keys++) \
{ \
Datum __atp; \
bool __isnull; \
Datum __test; \
\
if (__cur_keys->sk_flags & SK_ISNULL) \
{ \
(result) = false; \
break; \
} \
\
__atp = heap_getattr((tuple), \
__cur_keys->sk_attno, \
(tupdesc), \
&__isnull); \
\
if (__isnull) \
{ \
(result) = false; \
break; \
} \
\
__test = FunctionCall2(&__cur_keys->sk_func, \
__atp, __cur_keys->sk_argument); \
\
if (!DatumGetBool(__test)) \
{ \
(result) = false; \
break; \
} \
} \
} while (0)
#endif /* VALID_H */