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70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* valid.h
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* POSTGRES tuple qualification validity definitions.
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*
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*
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* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/valid.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef VALID_H
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#define VALID_H
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/*
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* HeapKeyTest
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*
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* Test a heap tuple to see if it satisfies a scan key.
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*/
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#define HeapKeyTest(tuple, \
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tupdesc, \
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nkeys, \
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keys, \
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result) \
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do \
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{ \
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/* Use underscores to protect the variables passed in as parameters */ \
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int __cur_nkeys = (nkeys); \
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ScanKey __cur_keys = (keys); \
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\
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(result) = true; /* may change */ \
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for (; __cur_nkeys--; __cur_keys++) \
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{ \
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Datum __atp; \
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bool __isnull; \
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Datum __test; \
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\
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if (__cur_keys->sk_flags & SK_ISNULL) \
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{ \
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(result) = false; \
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break; \
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} \
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\
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__atp = heap_getattr((tuple), \
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__cur_keys->sk_attno, \
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(tupdesc), \
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&__isnull); \
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\
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if (__isnull) \
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{ \
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(result) = false; \
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break; \
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} \
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\
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__test = FunctionCall2Coll(&__cur_keys->sk_func, \
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__cur_keys->sk_collation, \
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__atp, __cur_keys->sk_argument); \
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\
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if (!DatumGetBool(__test)) \
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{ \
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(result) = false; \
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break; \
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} \
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} \
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} while (0)
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#endif /* VALID_H */
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