[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - Urgent help please!
[Using JBoss 4.0.3, EJB2, MySQL] Hi Folks, I have an EJB 2.0 app. and I need to effect the following (psudo) query for an entity... SELECT obj FROM Obj WHERE (obj.x IN {0}) LIMIT {1} Using dynamicQL does it, but the LIMIT doesn't go into the actual SQL for MySQL and blows the transaction timeout. OK, so I use declared-sql, but I NEED to parameterise the IN list from the application - how can do I do this? Anybody got any ideas, or alternative approaches. Many many thanks for any help [Hope this is clear enough] Ian Hunter View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958256#3958256 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3958256 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
[jboss-user] [Beginners Corner] - Caching large volumes of entities
Hi Folks, We have a server designed to serve 'live' database data. We have now been asked to provide a facility for querying 'historical' database data from the database. I *think* that serving up large volumes of historical data would consume resources and slow down the live service. [I *really* think the historical stuff should be on another box but thats another fight.] I propose to NOT use JBoss CMP, but to go straight to JDBC for these historical queries [the queries will also be paged for performance]. Does anybody have similar experiences they can share, and any alternative ideas. For instance, can I destroy the cache for the historical data when the data has been sent to the client - if so, an example would be really great. Any ideas or comments appreciated Ian Hunter View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973857#3973857 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3973857 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user