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 Post subject: Hibernate HQL query does not support PostgreSQL "::" casting
PostPosted: Thu Sep 21, 2017 5:51 pm 
Newbie

Joined: Fri Sep 01, 2017 2:40 am
Posts: 17
Hi, I'm trying to run the query below in postgres with em.createQuery();

Code:
String q = "select id from Calendar c " +
    "where c.isActive = 1 and " +
    "date_part('dow', '2017-09-19 13:23:23'::date) = c.frequencyValue)";
Query query = em.createQuery(q);
List results = query.getResultList();


The problem I have now is if I don't include
Code:
::date
, postgres will throw an exception.
Code:
Could not choose a best candidate function. You might need to add explicit type casts.

but If I include ::date, hibernate will complain.


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 Post subject: Re: cant have ::date in query
PostPosted: Fri Sep 22, 2017 1:53 am 
Hibernate Team
Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1586
Location: Romania
The :: PostgreSQL operator will not be recognized by the JPQL query parser so Hibernate will complain.

What you need here is to use TO_DATE or TO_TIMESTAMP to convert the String date/time to a Date or Timestamp.

So, try it like this:

Code:
String q = "select id from Calendar c " +
    "where c.isActive = 1 and " +
    "date_part('dow', TO_TIMESTAMP('2017-09-19 13:23:23', 'YYYY-MM-dd H24:MI:SS')) = c.frequencyValue)";
Query query = em.createQuery(q);
List results = query.getResultList();

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 Post subject: Re: cant have ::date in query
PostPosted: Fri Sep 22, 2017 11:53 am 
Newbie

Joined: Fri Sep 01, 2017 2:40 am
Posts: 17
vlad wrote:
The :: PostgreSQL operator will not be recognized by the JPQL query parser so Hibernate will complain.

What you need here is to use TO_DATE or TO_TIMESTAMP to convert the String date/time to a Date or Timestamp.

So, try it like this:

Code:
String q = "select id from Calendar c " +
    "where c.isActive = 1 and " +
    "date_part('dow', TO_TIMESTAMP('2017-09-19 13:23:23', 'YYYY-MM-dd H24:MI:SS')) = c.frequencyValue)";
Query query = em.createQuery(q);
List results = query.getResultList();


Thanks Vald. I ended up using cast(). was trying to see if there's a way for hibernate to handle :: because it is easier to read for me. Anyway, thank you so much!


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