> 2. how to combine the results from all these classes and list the > comments by date? I dont understanding this part. any sample code on > this?
you will need 3 queries. one query for each entity. each queries will need to be executed individualy. ie (puesdo code) pm.execute("select c.text from CommentA c where date=?") pm.execute("select c.text from CommentB c where date=?") pm.execute("select c.text from CommentC c where date=?") so your write may be fast but now your reads will be slow. u cant 'OR' the queries since they are different entities. This solution doesnt look like a scalable solution for bigtable. was the article for SQL tables NOT bigtable? -lp -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.