Yoann Rodière (
https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%...
) *created* an issue
Hibernate ORM (
https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZmMxMGUyNzEx...
) / Bug (
https://hibernate.atlassian.net/browse/HHH-14034?atlOrigin=eyJpIjoiZmMxMG...
) HHH-14034 (
https://hibernate.atlassian.net/browse/HHH-14034?atlOrigin=eyJpIjoiZmMxMG...
) session.byMultipleIds() ignores the provided graph (
https://hibernate.atlassian.net/browse/HHH-14034?atlOrigin=eyJpIjoiZmMxMG...
)
Issue Type: Bug Affects Versions: 5.4.16 Assignee: Unassigned Components: hibernate-core
Created: 20/May/2020 06:47 AM Fix Versions: 5.4-backlog Priority: Major Reporter: Yoann
Rodière (
https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%...
)
As far as I can tell, the graph mentioned in the code below will always be ignored:
session.byMultipleIds( Parent.class )
.with( (RootGraph) session.getEntityGraph( "eager" ), GraphSemantic.FETCH )
.multiLoad( 1, 2, 3 );
This ticket may be a duplicate of HHH-12818 (
https://hibernate.atlassian.net/browse/HHH-12818 ) Open , but honestly I can't bring
myself to consider this as an "improvement" since the API to specify an entity
graph already exists (but is apparently non-functional).
Here is a branch with a reproducer:
I also tried to start working on a fix, but this turned out to be more complex than
initially anticipated. In particular:
* for some reason, fetch graphs apparently don't reset eager associations to lazy;
* the implementation of load graphs seem to be specific to parsed HQL queries (see
org.hibernate.engine.query.spi.EntityGraphQueryHint#toFromElements ,
org.hibernate.hql.internal.ast.HqlSqlWalker#processQuery ), and I'm not sure how to
copy that implementation to
org.hibernate.loader.entity.DynamicBatchingEntityLoaderBuilder.DynamicEntityLoader.
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