December 2007 - hibernate-issues - Jboss List Archives

[Hibernate-JIRA] Created: (HHH-2429) SQL Character Types Incorrectly mapped to Java objects

by Tyler Van Gorder (JIRA)

SQL Character Types Incorrectly mapped to Java objects ------------------------------------------------------ Key: HHH-2429 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2429 Project: Hibernate3 Type: Bug Components: core Versions: 3.2.1 Environment: Hibernate 3.2.1, Oracle10g Reporter: Tyler Van Gorder We have a work flow that allows the user to enter an arbitrary SQL statement to be executed by our application. We pass those queries through session.createSQLQuery(). We ran into a problem with String literals, which are reported by Oracle (ResultSetMetaData) to be CHAR. Reading the JDBC API, CHAR is a fixed length string. Hibernate is incorrectly mapping this to a Character field. We ended up overriding the Oracle dialect with our own as follows: In our constructor, for a dialect that extends Oracle9iDialect: super() registerColumnType(Types.CHAR, "char($l)" ); registerHibernateType( Types.CHAR, Hibernate.STRING.getName() ); The HibernateType is the crucial one and we are overriding the behavior in the base "Dialect" class, so this appears that it would be a problem for all database variants that don't explicitly change this. Thanks. -- 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

12 years, 7 months

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[Hibernate-JIRA] Created: (HHH-2774) Call ResultTransformer.transformList() even if the list argument is an empty list

by Christian Bauer (JIRA)

Call ResultTransformer.transformList() even if the list argument is an empty list --------------------------------------------------------------------------------- Key: HHH-2774 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2774 Project: Hibernate3 Issue Type: Improvement Components: core Reporter: Christian Bauer Priority: Trivial I have a case where a ResultTransformer is doing all the work in transformTuple() and always returns null from that method. The transformed target state is held internally in the ResultTransformer instance (I basically turn many tuples into one). Now I can't get this state out of the ResultTransformer because transformList() is not called after transformTuple(). It would be better if transformList() is called even if the list of tuples returned by transformTuple() is empty. -- 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

12 years, 7 months

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[Hibernate-JIRA] Created: (EJB-276) Support for CLOB not working for DB2 when table per concrete class is being used

by breako (JIRA)

Support for CLOB not working for DB2 when table per concrete class is being used -------------------------------------------------------------------------------- Key: EJB-276 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-276 Project: Hibernate Entity Manager Type: Bug Versions: 3.2.1 Reporter: breako Hi, This came up in the forums: http://forum.hibernate.org/viewtopic.php?p=2344008#2344008 Sample code: Two Pojos @Entity public class Person { private int i; @Identity public int getI() { return i; } public void setI(int i){ this.i = i; } } @Entity public class Employee extends Person{ @Basic(fetch=FetchType.LAZY) @Lob public String getClobAttr() { return clobAttr; } public void setClobAttr(String clobAttr) { this.clobAttr = clobAttr; } } Simple test: public static void main (String args[]) { Query queryImpl = em.createQuery(" from Person"); List list = queryImpl.getResultList(); } This will generate SQL select person0_.clobAttr as clobAttr1 from (select nullif(0,0) as clobAttr from TPerson union all select clobAttr from TEmployee) person0_ which chucks the exception: DB2 SQL error: SQLCODE: -415, SQLSTATE: 42825, SQLERRMC: null I think the SQL hibernate should generate should be: select person0_.clobAttr as clobAttr1 from (select cast(null as CLOB) as clobAttr from TPerson union all select clobAttr from TEmployee) person0_ -- 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

12 years, 8 months

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[Hibernate-JIRA] Created: (HHH-2955) Unnecessary version updates in two cases.

by Sławomir Wojtasiak (JIRA)

Unnecessary version updates in two cases. ----------------------------------------- Key: HHH-2955 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2955 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.2.5 Environment: JDK 5.0 Reporter: Sławomir Wojtasiak Attachments: HibernateTest.zip I found two situations where hibernate generates unnecessary version updates. Let's illustrate it with a simple example: Session session = SessionFactory.getSession(); Transaction transaction = session.getTransaction(); transaction.begin(); Article a = new Article(); a.setName( "atricle" ); ********************************************* *** Quantity is the owner of the relation *** ********************************************* Quantity q = new Quantity(); q.setName( "quantity" ); q.setArticle( a ); a.getQuantities().add( q ); session.persist( a ); session.flush(); ***** Hibernate generates following SQLs ***** Hibernate: select nextval ('hibernate_sequence') Hibernate: select nextval ('hibernate_sequence') Hibernate: insert into Article (name, version, id) values (?, ?, ?) Hibernate: insert into Quantity (article_id, name, version, id) values (?, ?, ?, ?) ********************************************** a.getQuantities().clear(); session.flush(); *** Hibernate generates following SQLs *** Hibernate: update Article set name=?, version=? where id=? and version=? This update of version field is performed because collection of quantities is marked as dirty, but Article entity is not relation owner so nothing change in database after this clear. Should it works like this? It looks like a bug because database remain unchanged so version changing is unnecessary in my opinion. ****************************************** session.clear(); **** SECOND PROBLEM *** Now I generate true copy of persisted objects. Notice that I use HashSet instead of PersistSet which was set during persist operation. This operation is similar to merging objects prepared by SOAP, during communication with remote client for example. *********************** Article a1 = new Article(); a1.setId( a.getId() ); a1.setName( a.getName() ); a1.setVersion( a.getVersion() ); Quantity q1 = new Quantity(); q1.setArticle( a1 ); q1.setName( q.getName() ); q1.setVersion( q.getVersion() ); q1.setId( q.getId() ); a1.getQuantities().add( q1 ); a1 = (Article)session.merge( a1 ); session.flush(); ***** This operation generates following SQLs ***** Hibernate: select article0_.id as id0_1_, article0_.name as name0_1_, article0_.version as version0_1_, quantities1_.article_id as article4_3_, quantities1_.id as id3_, quantities1_.id as id1_0_, quantities1_.article_id as article4_1_0_, quantities1_.name as name1_0_, quantities1_.version as version1_0_ from Article article0_ left outer join Quantity quantities1_ on article0_.id=quantities1_.article_id where article0_.id=? Hibernate: update Article set name=?, version=? where id=? and version=? It looks like problem is located in replaceElements() method of CollectgionType class (or somewhere near it). Maybe I'm wrong but this collection was checked for changes during merge operation (See this select above.) so why it remains dirty if it contains the same data as database?. I checked this issue on other JPA implementations (OpenJPA for example) and version is not incremented after similar merge operation. ***************************************************** transaction.rollback(); -- 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

12 years, 8 months

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[Hibernate-JIRA] Created: (EJB-318) PostUpdate callback not called after update on a collection / association (@OneToMany for example)

by Aghnar von Salza (JIRA)

PostUpdate callback not called after update on a collection / association (@OneToMany for example) -------------------------------------------------------------------------------------------------- Key: EJB-318 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-318 Project: Hibernate Entity Manager Issue Type: Bug Components: EntityManager Environment: Hibernate core3.2.5, entityManager 3.3.1, annotation 3.3.0, oracle 9i Reporter: Aghnar von Salza Environment is Weblogic 10 (J2EE 5), with Hibernate used as JPA provider There is no PostUpdate callback on an entity when one of its collections of other Entities (for example annoted with @OneToMany) is updated (i mean when one entity element is added or removed). JPA specification says that a postUpate must be called after the update of at least one data of an entity. I think we have to consider that a collection of other entities can be considered as data. -- 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

12 years, 8 months

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[Hibernate-JIRA] Created: (ANN-667) Foreign key name on @OneToOne

by Immo Heikkinen (JIRA)

Foreign key name on @OneToOne ----------------------------- Key: ANN-667 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-667 Project: Hibernate Annotations Issue Type: Bug Components: binder Affects Versions: 3.3.0.ga Environment: Hibernate Core 3.2.5.GA , Hibernate Annotations 3.3.0.GA, Sybase ASE 15 Reporter: Immo Heikkinen Priority: Minor Attachments: Child.java, Parent.java Foreign key constraint name cannot be changed using @org.hibernate.annotations.ForeignKey on a @OneToOne with foreign key. It doesn't matter which class is annotated with @ForeignKey. Please find the test case as an attachment. Original thread on the user forum: http://forum.hibernate.org/viewtopic.php?p=2367400 -- 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

12 years, 9 months

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[Hibernate-JIRA] Created: (HHH-2225) NPE when eager fetching joined component with native SQL query

by Christian Bauer (JIRA)

NPE when eager fetching joined component with native SQL query -------------------------------------------------------------- Key: HHH-2225 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2225 Project: Hibernate3 Type: Bug Components: query-sql Versions: 3.2.0.ga Reporter: Christian Bauer Priority: Minor Item -> many-to-one -> User -> joined component -> billingAddress This: result = session.createSQLQuery("select {i.*}, {u.*}, {ba.*} from ITEM i" + " join USERS u on i.SELLER_ID = u.USER_ID" + " left join BILLING_ADDRESS ba on u.USER_ID = ba.USER_ID" + " where u.USERNAME = :uname") .addEntity("i", Item.class) .addJoin("u", "i.seller") .addJoin("ba", "u.billingAddress") fails with: java.lang.NullPointerException at org.hibernate.loader.DefaultEntityAliases.<init>(DefaultEntityAliases.java:37) at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.generateCustomReturns(SQLQueryReturnProcessor.java:283) at org.hibernate.loader.custom.sql.SQLCustomQuery.<init>(SQLCustomQuery.java:129) at org.hibernate.engine.query.NativeSQLQueryPlan.<init>(NativeSQLQueryPlan.java:43) at org.hibernate.engine.query.QueryPlanCache.getNativeSQLQueryPlan(QueryPlanCache.java:114) at org.hibernate.impl.AbstractSessionImpl.getNativeSQLQueryPlan(AbstractSessionImpl.java:137) at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:142) at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:150) -- 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

12 years, 9 months

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[Hibernate-JIRA] Created: (HHH-3028) Memory consumption when query cache is enabled

by Markus Heiden (JIRA)

Memory consumption when query cache is enabled ---------------------------------------------- Key: HHH-3028 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3028 Project: Hibernate3 Issue Type: Bug Components: caching (L2), core Affects Versions: 3.2.5 Environment: Hibernate 3.2.5, Oracle 9i Reporter: Markus Heiden As discussed in the hibernate-dev mailing list from 9.11.2007 to 12.11.2007 this bug describes a memory consumption issue which is located in ActionQueue/EntityAction. Some snippets from ActionQueue: private ArrayList executions; public void execute(Executable executable) { final boolean lockQueryCache = session.getFactory().getSettings().isQueryCacheEnabled(); if ( executable.hasAfterTransactionCompletion() || lockQueryCache ) { executions.add( executable ); } ... } This code leads to a kind of memory leak, because if the "executable" is added to "executions", the related entity which is referenced from the "executable" is prevented from being garbage collected until the transaction ends. So if one needs to insert large amounts of transient objects in one transaction, there is no chance to get rid of the inserted objects by flushing and evicting them, if e.g. the query cache is enabled. One solution to this problem might be to rework the above "if" condition to only add objects to "executions" if this is really needed. The problem is to determine when it is really needed. Some snippets from EntityAction (which implements Executable): private final Object instance; public final Serializable getId() { if ( id instanceof DelayedPostInsertIdentifier ) { return session.getPersistenceContext().getEntry( instance ).getId(); } return id; } public final Object getInstance() { return instance; } Another solution might be to set the reference to the related entity (field "instance" in EntityAction) to null after flushing. This does not prevent "executions" from being filled, but the related entities might be garbage collected and so the memory consumption is acceptable. The problem is that subclasses of EntityAction use the "instance" field for post transaction work. The are currently two workarounds to this problems: 1) To always disable the query cache 2) To use shorter transactions Workaround 1 is not really acceptable, because it prohibits the use of a very useful feature. Workaround 2 is sometimes acceptable but not wanted in most cases, because it breaks transactional safety. -- 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

12 years, 9 months

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[Hibernate-JIRA] Created: (HHH-2449) Lazy loading for one-to-one asociations

by jose (JIRA)

Lazy loading for one-to-one asociations --------------------------------------- Key: HHH-2449 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2449 Project: Hibernate3 Type: New Feature Components: core Versions: 3.2.2 Environment: Hibernate 3.2.2 Reporter: jose After read "Some explanations on lazy loading" and my tests I found a lossing feature in Hibernate (3.2.2). one-to-one with lazy="proxy"_____________________________________________ Hibernate ALWAYS launch selects to know if one-to-one is null or can be proxied. one-to-one with lazy="no-proxy"__________________________________________ Instrumentation allows to hibernate modify the getter to allows lazy loading on demand: * but allways initialize ALL no-proxy relations (with first getter call) -> must initialize ONLY the requested property * never auto-initialize FETCH joins, ALWAYS doit on demand (if opened session) -> must auto-initialize ONLY the FETCHED property note: Can submit a fix for this? How? NEW FEATURE: one-to-one with lazy="proxy" without multiple SELECTS______ If Hibernate adds join, for all one-to-one relations, to get the foreign-key of other tables, can check it to create a proxy or null. note: that hibernate adds joins for hierarchy, why not for one-to-one relations? This solution avoids: * 'multiple subselects' after first select * 'instrumentation' of bytecode -- 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

12 years, 10 months

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[Hibernate-JIRA] Created: (ANN-614) @WhereJoinTable doesn't work with @ManyToOne

by Victor (JIRA)

@WhereJoinTable doesn't work with @ManyToOne -------------------------------------------- Key: ANN-614 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-614 Project: Hibernate Annotations Issue Type: Bug Affects Versions: 3.3.0.ga Reporter: Victor @ManyToOne( fetch=FetchType.LAZY ) @JoinTable(name="CATEGORY_PRODUCT", uniqueConstraints = @UniqueConstraint(columnNames = {"PDID", "CATID"}), joinColumns = @JoinColumn(name="PDID"), inverseJoinColumns = @JoinColumn(name="CATID") ) @WhereJoinTable(clause="CATMAIN=1") protected Category getMainCategory() { return mainCategory; } protected void setMainCategories(Category mainCategory) { this.mainCategory = mainCategory; } Best regards, Victor -- 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

12 years, 10 months

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hibernate-issues December 2007