valid.h

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/*-------------------------------------------------------------------------
 *
 * valid.h
 *    POSTGRES tuple qualification validity definitions.
 *
 *
 * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/access/valid.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef VALID_H
#define VALID_H
 
#include "access/htup.h"
#include "access/htup_details.h"
#include "access/skey.h"
#include "access/tupdesc.h"
 
/*
 *      HeapKeyTest
 *
 *      Test a heap tuple to see if it satisfies a scan key.
 */
static inline bool
HeapKeyTest(HeapTuple tuple, TupleDesc tupdesc, int nkeys, ScanKey keys)
{
    int         cur_nkeys = nkeys;
    ScanKey     cur_key = keys;
 
    for (; cur_nkeys--; cur_key++)
    {
        Datum       atp;
        bool        isnull;
        Datum       test;
 
        if (cur_key->sk_flags & SK_ISNULL)
            return false;
 
        atp = heap_getattr(tuple, cur_key->sk_attno, tupdesc, &isnull);
 
        if (isnull)
            return false;
 
        test = FunctionCall2Coll(&cur_key->sk_func,
                                 cur_key->sk_collation,
                                 atp, cur_key->sk_argument);
 
        if (!DatumGetBool(test))
            return false;
    }
 
    return true;
}
 
#endif                          /* VALID_H */