public static Expression datePartStr(String expression, DatePartExt part) {
        return datePartStr(x(expression), part);
    }
public static Expression datePartStr ( String expression , DatePartExt part ) { return datePartStr ( x ( expression ) , part ) ; }
Returned expression results in Date part as an integer.
The date expression is a string in a supported format, and part is one of the supported date part strings.