[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2676) Cannot apply UPGRADE lock to scalar Query object
Cannot apply UPGRADE lock to scalar Query object
------------------------------------------------
Key: HHH-2676
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2676
Project: Hibernate3
Issue Type: Bug
Components: query-hql
Affects Versions: 3.1
Reporter: John Wood
Priority: Minor
Attachments: Bean.hbm.xml, Bean.java
If you try and add a lock to a Query object (against a named alias) when doing a scalar
HQL query (e.g. "select sum(foo) from bah") then an error occurs.
The sample code (full working example is attached):
// Create query
Query q = session.createQuery("select b.value from Bean b");
// Set lock mode on query
q.setLockMode("b", LockMode.UPGRADE);
// Executre
q.list();
This causes the following error:
Exception in thread "main" java.lang.IllegalArgumentException: could not
locate alias to apply lock mode : b
at org.hibernate.loader.hql.QueryLoader.applyLocks(QueryLoader.java:297)
at org.hibernate.loader.Loader.preprocessSQL(Loader.java:201)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
at org.hibernate.loader.Loader.doQuery(Loader.java:673)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.doList(Loader.java:2220)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
I have tried this both with an older version of Hibernate (3.1) and the latest with the
same result (although the older Hibernate has the error message "alias not
found".
I have attached a simple example to demonstrate this.
See also HHH-1965.
Perhaps, it is simply that one cannot lock scalar queries of this type. If so, then the
fix would presumably be to include this in the Query class Javadocs.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://opensource.atlassian.com/projects/hibernate/secure/Administrators....
-
For more information on JIRA, see: http://www.atlassian.com/software/jira