5:16 a.m.
Incorrect join ordering with filters and JOINED inheritance
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Key: HHH-2113
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2113
Project: Hibernate3
Type: Bug
Versions: 3.2.0.cr4
Environment: Hibernate 3.2.0 CR4, MySQL 4.1.20
Reporter: Barney Boisvert
I've a TextBlock object that extends AbstractContentObject (and has myriad other
associations illustrated here, but irrelevant) and when doing a polymorphic query for all
AbstractContentObjects Hibernate runs this SQL (note the line with the trailing
asterisks):
select
textblockv0_.id as id21_5_,
textblockv0_.createTimestamp as createTi2_21_5_,
textblockv0_.hibernateVersionId as hibernat3_21_5_,
textblockv0_.lastUpdateTimestamp as lastUpda4_21_5_,
textblockv0_.lastVersionNumber as lastVers5_21_5_,
textblockv0_.activeVersionId as activeVe6_21_5_,
textblockv1_.id as id20_0_,
textblockv1_.createTimestamp as createTi2_20_0_,
textblockv1_.hibernateVersionId as hibernat3_20_0_,
textblockv1_.lastUpdateTimestamp as lastUpda4_20_0_,
textblockv1_.versionNumber as versionN5_20_0_,
textblockv1_.frozen as frozen20_0_,
textblockv1_.commitMessage as commitMe7_20_0_,
textblockv1_.title as title20_0_,
textblockv1_.summary as summary20_0_,
textblockv1_.text as text20_0_,
textblockv1_.versionHistoryId as version11_20_0_,
textblockv2_.id as id21_1_,
textblockv2_.createTimestamp as createTi2_21_1_,
textblockv2_.hibernateVersionId as hibernat3_21_1_,
textblockv2_.lastUpdateTimestamp as lastUpda4_21_1_,
textblockv2_.lastVersionNumber as lastVers5_21_1_,
textblockv2_.activeVersionId as activeVe6_21_1_,
textblock3_.id as id18_2_,
textblock3_1_.createTimestamp as createTi2_18_2_,
textblock3_1_.hibernateVersionId as hibernat3_18_2_,
textblock3_1_.siteId as siteId18_2_,
textblock3_1_.orderCol as orderCol18_2_,
textblock3_1_.folderId as folderId18_2_,
textblock3_.versionHistoryId as versionH2_19_2_,
site4_.id as id1_3_,
site4_.createTimestamp as createTi2_1_3_,
site4_.hibernateVersionId as hibernat3_1_3_,
site4_.lastUpdateTimestamp as lastUpda4_1_3_,
site4_.name as name1_3_,
site4_.parentId as parentId1_3_,
site4_.timeZone as timeZone1_3_,
site4_.familyId as familyId1_3_,
site4_.externalSiteAccessControl as external7_1_3_,
site4_.canonicalDomainId as canonic10_1_3_,
folder5_.id as id17_4_,
folder5_.createTimestamp as createTi2_17_4_,
folder5_.hibernateVersionId as hibernat3_17_4_,
folder5_.lastUpdateTimestamp as lastUpda4_17_4_,
folder5_.leftCol as leftCol17_4_,
folder5_.rightCol as rightCol17_4_,
folder5_.siteId as siteId17_4_,
folder5_.title as title17_4_
from
TextBlockVersionHistory textblockv0_
left outer join
TextBlockVersion textblockv1_
on textblockv0_.activeVersionId=textblockv1_.id
left outer join
TextBlockVersionHistory textblockv2_
on textblockv1_.versionHistoryId=textblockv2_.id
left outer join
TextBlock textblock3_
on textblockv0_.id=textblock3_.versionHistoryId
and ? = textblock3_1_.siteId --
**************************************************
left outer join
AbstractContentObject textblock3_1_
on textblock3_.id=textblock3_1_.id
left outer join
Site site4_
on textblock3_1_.siteId=site4_.id
left outer join
Folder folder5_
on textblock3_1_.folderId=folder5_.id
where
textblockv0_.id=?
The highlighted condition is applied via a filter on AbstractContentObject:
@javax.persistence.Entity
@Inheritance(strategy = InheritanceType.JOINED)
@Filter(name = "siteVisibility", condition = ":siteId = siteId")
@Table(uniqueConstraints = @UniqueConstraint( columnNames = { "folderId",
"order"}))
public abstract class AbstractContentObject
However, the actual SQL condition is supplied to the wrong LEFT OUTER JOIN. It should be
supplied against the AbstractContentObject JOIN that immediately follows the condition.
I.e. move the condition down three lines, and it should work.
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