Question

We are using grails-groovy with Hibernate, I have a SQL query like this in my grails controller

    String markerCalcQuery =
    "select sum(trans_cnt) as t_count, location  from map2_data where "+
    "fdate between (:datefrom) and (:dateto) "+
    "and res_id=:res_id "+
    "group by location ;"

   res_row=gurculsql.rows(markerCalcQuery,[res_id:res_id,datefrom:format_dateprevious,dateto:format_datenow]);

How do I change this query to HQL, I don’t have a domain class map2_data, but want to know if I need to create it for converting this query to HQL, or can I convert it without doing that (should use gorm based implementation)?

I have many queries right now written for MySQL and I need to convert them to HQL.

I have now created the domain class map2_data. So how would the above query change (how to decide the functions… out of findallby, createcriteria, etc)

Regards,

Priyank

Answer 1

HQL works on Hibernate entities. If you don’t have an entity to map your table, you can’t use HQL on this table. That’s the principle of an ORM: use objects to represent tables.