Function array_cum_sum

methods/array_ops/src/pg_gp/array_ops.c:902–911

 */
PG_FUNCTION_INFO_V1(array_cum_sum);
Datum
array_cum_sum(PG_FUNCTION_ARGS){
    if (PG_ARGISNULL(0)) { PG_RETURN_NULL(); }

    ArrayType *v = PG_GETARG_ARRAYTYPE_P(0);
    ArrayType *res = General_Array_to_Cumulative_Array(v, Float8GetDatum(0.0), element_add);

    PG_FREE_IF_COPY(v, 0);
    PG_RETURN_ARRAYTYPE_P(res);
}

/*
 * This function returns the cumulative product of the array elements.