public NumberExpression<Integer> hour() {
        if (hours == null) {
            hours = Expressions.numberOperation(Integer.class, Ops.DateTimeOps.HOUR, mixin);
        }
        return hours;
    }
Create a hours expression (range 0-23)

@return hour
querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java