Function element_diff

methods/array_ops/src/pg_gp/array_ops.c:1282–1288

 */

static
inline
Datum
element_diff(Datum element, Oid elt_type, Datum result,
        Oid result_type, Datum opt_elt, Oid opt_type){
    return element_op(element, elt_type, result, result_type, opt_elt, opt_type, float8_diff);
}

/*
 * Add abs(elt1) to result.