Jooq中的替代SQL DATE_FORMAT

Question

I'm using 3.5 jooq version

I know that jooq don't support DATE_FORMAT function but what are the alternatives

This is the query that i want to create with JOOQ

SELECT DATE_FORMAT(`date_create`, '%d/%m/%Y') AS date_create FROM users
GROUP BY DATE_FORMAT(`date_create`, '%d/%m/%Y')

Answer 1

Whenever you need a vendor-specific SQL feature that is not supported by jOOQ out of the box, the plain SQL API will be your friend. Write a utility as such:

public static Field<String> dateFormat(Field<Date> field, String format) {
    return DSL.field("date_format({0}, {1})", SQLDataType.VARCHAR, 
        field, DSL.inline(format));
}

You can then use it like any other jOOQ-provided function:

DSL.using(configuration)
   .select(dateFormat(USERS.DATE_CREATE, "%d/%m/%Y").as("date_create"))
   .from(USERS)
   .groupBy(dateFormat(USERS.DATE_CREATE, "%d/%m/%Y"))
   .fetch();