Comments on: Hibernate exception when loading more than one collection http://iderror.com/errors/java/java_hibernate/hibernate-exception-when-loading-more-than-one-collection/ You have errors, we have solutions! Fri, 10 Jun 2011 15:06:54 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: adminhttp://iderror.com/errors/java/java_hibernate/hibernate-exception-when-loading-more-than-one-collection/comment-page-1/#comment-7893 admin Fri, 20 Mar 2009 10:28:59 +0000 http://localhost/idError/?p=7964#comment-7893 Here are the solutions: a. do not use a bag semantic: use a Set or a List annotated with @IndexColumn b. use a @CollectionId c. use @FetchMode(SELECT) or @FetchMode(SUBSELECT) The underlying reason is that you cannot load more than one bag semantic collection in a given SQL query conceptually, so you won't find this feature in other products either. Here are the solutions:
a. do not use a bag semantic: use a Set or a List annotated with @IndexColumn
b. use a @CollectionId
c. use @FetchMode(SELECT) or @FetchMode(SUBSELECT)
The underlying reason is that you cannot load more than one bag semantic collection in a given SQL query conceptually, so you won’t find this feature in other products either.

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