product — aggregate function to return the cumulative multipication product of a range of values.
This function computes a value for each record from the specified column of a base table, and returns the cumulative multiplication product of those values.
expr must include the name of a column in a LiveView table, where that column's data type is int, long, or double. The returned
value is of the same data type.
This LiveView aggregate function is based on the product aggregate function in the StreamBase expression language.