[jboss-jira] [JBoss JIRA] (HIBERNATE-172) Hibernate generates no needed update statement

[nimo stephan (Jira)]

     [ https://issues.redhat.com/browse/HIBERNATE-172?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

nimo stephan updated HIBERNATE-172:
-----------------------------------
    Description: 
I have an orderinary entity with this property:


{code:java}
    @Entity
    @DynamicUpdate
    public class User {

        private String name;
    
        @Convert(converter = TaskConverter.class)
        private Map<Task, Type> tasks;
    
    ..
    }
{code}


where the `Task` is an Enum-class and the `Type` is another Enum-class. The converter converts the tasks to a string and back. All works, however, Hibernate generates an additional update statement for the `tasks` when I create a new `User`-Instance or update other entity properties of the `User`-instance:
   

{code:java}
    // this update statement is always created altough "tasks" was not changed
    update User set tasks=? where id_user=?
{code}

The above update statement always follows after another update statement of the same entity. For example:

{code:java} 
   // here I only change the name property and an update is triggered
    update User set name=? where id_user=?
    // but then hibernate also creates this update statement even if I did not change tasks
    update User set tasks=? where id_user=?
{code}

It behaves as if `tasks` would be an @ElementCollection where the tasks is always recreated on create or update of its parent entity `User`. However, I annotated it with `@Convert`. 

Hibernate should not generate an update statement if `tasks` is left unchanged.

  was:
I have an orderinary entity with this property:


{code:java}
    @Entity
    @DynamicUpdate
    public class User {
    
        @Convert(converter = TaskConverter.class)
        private Map<Task, Type> tasks;
    
    ..
    }
{code}


where the `Task` is an Enum-class and the `Type` is another Enum-class. The converter converts the tasks to a string and back. All works, however, Hibernate generates an additional update statement for the `tasks` when I create a new `User`-Instance or update other entity properties of the `User`-instance:
   

{code:java}
    // this update statement is always created altough "tasks" was not changed
    update User set tasks=? where id_user=?
{code}

The above update statement always follows after another update statement of the same entity. For example:

{code:java} 
   // here I only change the name property and an update is triggered
    update User set name=? where id_user=?
    // but then hibernate also creates this update statement even if I did not change tasks
    update User set tasks=? where id_user=?
{code}

It behaves as if `tasks` would be an @ElementCollection where the tasks is always recreated on create or update of its parent entity `User`. However, I annotated it with `@Convert`. 

Hibernate should not generate an update statement if `tasks` is left unchanged.



> Hibernate generates no needed update statement
> ----------------------------------------------
>
>                 Key: HIBERNATE-172
>                 URL: https://issues.redhat.com/browse/HIBERNATE-172
>             Project: Hibernate Integration
>          Issue Type: Bug
>            Reporter: nimo stephan
>            Assignee: Steve Ebersole
>            Priority: Major
>
> I have an orderinary entity with this property:
> {code:java}
>     @Entity
>     @DynamicUpdate
>     public class User {
>         private String name;
>     
>         @Convert(converter = TaskConverter.class)
>         private Map<Task, Type> tasks;
>     
>     ..
>     }
> {code}
> where the `Task` is an Enum-class and the `Type` is another Enum-class. The converter converts the tasks to a string and back. All works, however, Hibernate generates an additional update statement for the `tasks` when I create a new `User`-Instance or update other entity properties of the `User`-instance:
>    
> {code:java}
>     // this update statement is always created altough "tasks" was not changed
>     update User set tasks=? where id_user=?
> {code}
> The above update statement always follows after another update statement of the same entity. For example:
> {code:java} 
>    // here I only change the name property and an update is triggered
>     update User set name=? where id_user=?
>     // but then hibernate also creates this update statement even if I did not change tasks
>     update User set tasks=? where id_user=?
> {code}
> It behaves as if `tasks` would be an @ElementCollection where the tasks is always recreated on create or update of its parent entity `User`. However, I annotated it with `@Convert`. 
> Hibernate should not generate an update statement if `tasks` is left unchanged.



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