[Hibernate] derby support
I am working on enhancing Derby support a little bit, but have run into an issue with their syntax that I am unable to figure out. I was hoping someone on this list was familiar enough with Derby to point me in the right direction. Specifically, I am trying to properly deal with the manner in which Derby (and also DB2 largely) expects columns to be referenced in certain clauses. For example, because Hibernate always aliases columns in the select clause, derby requires that those aliases be used in certain later clauses. The query I am trying to work through right now is as follows: select model0_.name as col_0_0_, count(*) as col_1_0_ from Model model0_ group by model0_.name having count(*) > 1 However, I get errors from Derby when passing this to the DB: ERROR 42X04: Column 'MODEL0_.COL_0_0_' is either not in any table in the FROM list or appears within a join specification and is outside the scope of the join specification or appears in a HAVING clause and is not in the GROUP BY list. If this is a CREATE or ALTER TABLE statement then 'MODEL0_.COL_0_0_' is not a column in the target table. If the having clause is removed, the query parses fine; I have tried various incantations regarding how to define the having clause without avail. This query seems taken almost verbatim from their reference docs, yet I cannot get this to work... http://db.apache.org/derby/docs/10.1/ref/rrefselectexpression.html Any thoughts? - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
[Hibernate] Session.replicate() into IDENTITY table ?
A while ago I highlighted a problem with the differences between the documented API and what Hibernate actually does and I'm seeking to an open discussion about the merits and problems to renaming the current #replicate() function to #replicateOrSave() to better identify what it actually does. This is so that a hole can be left open to implement a real #replicate() function which makes contact guarantees that the primary key / OID will be identical even in IDENTITY tables in the replicated object or otherwise it throws an exception. There should also be a feature enquiry function to allow the API programmer to ask the underlying Hibernate implementation to verify if a replication on identity table will work. This would account for JDBC driver vendors and versions and the realtime SQL database server vendor and version. http://www.mail-archive.com/hibernate-devel@lists.sourceforge.net/msg05230.html http://forum.hibernate.org/viewtopic.php?t=949574&highlight= http://www.hibernate.org/hib_docs/v3/api/org/hibernate/Session.html#replicate(java.lang.Object,%20org.hibernate.ReplicationMode) RFC Darryl - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
Re: [Hibernate] [hibernate-dev] derby support
https://issues.apache.org/jira/browse/DERBY-1624 and also regarding some decent JPA certification https://issues.apache.org/jira/browse/DERBY-1623 There are probably other limitations hidden Steve Ebersole wrote: > I am working on enhancing Derby support a little bit, but have run into > an issue with their syntax that I am unable to figure out. I was hoping > someone on this list was familiar enough with Derby to point me in the > right direction. > > Specifically, I am trying to properly deal with the manner in which > Derby (and also DB2 largely) expects columns to be referenced in certain > clauses. For example, because Hibernate always aliases columns in the > select clause, derby requires that those aliases be used in certain > later clauses. The query I am trying to work through right now is as > follows: > select > model0_.name as col_0_0_, > count(*) as col_1_0_ > from > Model model0_ > group by > model0_.name > having > count(*) > 1 > > However, I get errors from Derby when passing this to the DB: > ERROR 42X04: Column 'MODEL0_.COL_0_0_' is either not in any table in the > FROM list or appears within a join specification and is outside the > scope of the join specification or appears in a HAVING clause and is not > in the GROUP BY list. If this is a CREATE or ALTER TABLE statement then > 'MODEL0_.COL_0_0_' is not a column in the target table. > > If the having clause is removed, the query parses fine; I have tried > various incantations regarding how to define the having clause without > avail. > > This query seems taken almost verbatim from their reference docs, yet I > cannot get this to work... > http://db.apache.org/derby/docs/10.1/ref/rrefselectexpression.html > > Any thoughts? > > ___ > hibernate-dev mailing list > hibernate-dev@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hibernate-dev > > - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
