Datum gin_triconsistent_agtype()

in src/backend/utils/adt/agtype_gin.c [408:464]

• 46 lines of code
• 14 McCabe index (conditional complexity)

Datum gin_triconsistent_agtype(PG_FUNCTION_ARGS)
{
    GinTernaryValue *check;
    StrategyNumber strategy;
    int32 nkeys;
    GinTernaryValue res = GIN_MAYBE;
    int32 i;

    if (PG_ARGISNULL(0) || PG_ARGISNULL(1) || PG_ARGISNULL(3))
    {
        PG_RETURN_NULL();
    }

    check = (GinTernaryValue *)PG_GETARG_POINTER(0);
    strategy = PG_GETARG_UINT16(1);
    nkeys = PG_GETARG_INT32(3);

    /*
     * Note that we never return GIN_TRUE, only GIN_MAYBE or GIN_FALSE; this
     * corresponds to always forcing recheck in the regular consistent
     * function, for the reasons listed there.
     */
    if (strategy == AGTYPE_CONTAINS_STRATEGY_NUMBER ||
        strategy == AGTYPE_CONTAINS_TOP_LEVEL_STRATEGY_NUMBER ||
        strategy == AGTYPE_EXISTS_ALL_STRATEGY_NUMBER)
    {
        /* All extracted keys must be present */
        for (i = 0; i < nkeys; i++)
        {
            if (check[i] == GIN_FALSE)
            {
                res = GIN_FALSE;
                break;
            }
        }
    }
    else if (strategy == AGTYPE_EXISTS_STRATEGY_NUMBER ||
             strategy == AGTYPE_EXISTS_ANY_STRATEGY_NUMBER)
    {
        /* At least one extracted key must be present */
        res = GIN_FALSE;
        for (i = 0; i < nkeys; i++)
        {
            if (check[i] == GIN_TRUE || check[i] == GIN_MAYBE)
            {
                res = GIN_MAYBE;
                break;
            }
        }
    }
    else
    {
        elog(ERROR, "unrecognized strategy number: %d", strategy);
    }

    PG_RETURN_GIN_TERNARY_VALUE(res);
}