[jboss-user] [EJB 3.0] - Re: EntityManager's Native Query & Paging Results

[rabbiaqaswar]

Thanks.

I enabled Trace and the two queries executed internally are actually different!

Here is the query which is executed with the setfirstResult(0) and setMaxResults(20):

select * from (SELECT DISTINCT USR.USERID FROM USER USR, USERWATCH UW WHERE  USR.ADDEDBYID =1 AND 
  | USR.COUNTRY = CASE WHEN (UW.COUNTRY is null) THEN USR.COUNTRY ELSE UW.COUNTRY END AND USR.ALIVE = 'A') where rownum <= ?

and for setFirstResult(10) and setMaxResult(10), the query is:
select * from ( select row_.*, rownum rownum_ from (SELECT DISTINCT USR.USERID FROM USER USR, USERWATCH UW WHERE  USR.ADDEDBYID =1 AND USR.COUNTRY = CASE WHEN (UW.COUNTRY is null) THEN USR.COUNTRY ELSE UW.COUNTRY END AND USR.ALIVE = 'A') row_ where rownum <= ?) where rownum_ > ?

Any idea, what is happening here?

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