[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-704) Loading objects leads to 1+n queries when JPA's @Id != @DocumentId property

Loading objects leads to 1+n queries when JPA's @Id != @DocumentId property --------------------------------------------------------------------------- Key: HSEARCH-704 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-704 Project: Hibernate Search Issue Type: Improvement Components: query Reporter: Emmanuel Bernard Assignee: Hardy Ferentschik Today we load the objects once using a Criteria query. And to return the object by relevance, we call ObjectLoaderHelper.returnAlreadyLoadedObjectsInCorrectOrder which in the @DocumentId != @Id case, runs one criteria query per object again. That leads to 1+n queries which is not acceptable. To work around that we could (only in the @DocumentId != @Id) case: - run the first criteria query so that it returns a List of tuples { documentIdProperty, entity } - keep this List around - when loading entities ber relevant order, use this list to fetch the data from memory instead of this additional n Criteria queries)