How do i group by date only from date time field in JPQL

Question

For mysql I wrote a query like

SELECT * FROM mytable GROUP BY DATE(dateTimeField)

But i can\'t use the DATE() function in JPQL

Answer 1

For Hibernate:

Suggestion 1:

Use cast(dateTimeField as date). See here.

Suggestion 2:

You can try to concatenate year, month and year HQL expressions.

Take a look at line 360 of this testcase.

str(year(current_date))||'-'||str(month(current_date))||'-'||str(day(current_date))

But take the time to see the generated SQL, it may (and probably will be) ugly and slow.