Function element_op

methods/array_ops/src/pg_gp/array_ops.c:1254–1272

* Template for element-wise help functions */

 *    Template for element-wise help functions
 */
static
inline
Datum
element_op(Datum element, Oid elt_type, Datum result,
        Oid result_type, Datum opt_elt, Oid opt_type,
        float8 (*op)(float8, float8, float8)) {
    if (op == float8_div &&
            (result_type == INT2OID ||
             result_type == INT4OID ||
             result_type == INT8OID)) {
        int64 num   = datum_int64_cast(element, elt_type);
        int64 denom = datum_int64_cast(opt_elt, opt_type);
        return int64_datum_cast(int64_div(num, denom), result_type);
    }
    float8 elt = datum_float8_cast(element, elt_type   );
    float8 res = datum_float8_cast(result , result_type);
    float8 opt = datum_float8_cast(opt_elt, opt_type   );
    return float8_datum_cast((*op)(elt, res, opt), result_type);
}


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