[jboss-jira] [JBoss JIRA] (HIBERNATE-167) Map with Enum as key value generates two need unnecessary update statements

[nimo stephan (Jira)]

nimo stephan created HIBERNATE-167:
--------------------------------------

             Summary: Map with Enum as key value generates two need unnecessary update statements
                 Key: HIBERNATE-167
                 URL: https://issues.jboss.org/browse/HIBERNATE-167
             Project: Hibernate Integration
          Issue Type: Bug
         Environment: hibernate-core (v. 5.4.4.Final)
            Reporter: nimo stephan
            Assignee: Steve Ebersole


Having this within an Entity class:


{code:java}
public class User {

@Column(name = "test")
private String test;

// this makes trouble (but the taskConverter works as expected)
// only the persisting makes two needless update statements each time a new User is created
@Column(name = "tasks")
@Convert(converter = TasksConverter.class)
private Map<Task, String> tasks;
}
{code}


and creating a new Entity


{code:java}
User user = new User();
user.setName("test");
// this generates two unnecessary updates:
user.setTasks(Map.of(Task.TASK_START, "hello"));
{code}


creates at first the entity:


{code:java}
/* insert my.User
11:54:43,848 INFO  [stdout]         */ insert 
11:54:43,848 INFO  [stdout]         into
11:54:43,848 INFO  [stdout]             user
11:54:43,855 INFO  [stdout]             (test, tasks)
11:54:43,855 INFO  [stdout]             values
11:54:43,855 INFO  [stdout]             (?, ?)
{code}

*and produces afterwards within the same session two entity updates (which are needless):*



{code:java}
/* update
11:54:44,100 INFO  [stdout]         my.User*/ update
11:54:44,100 INFO  [stdout]             user 
11:54:44,100 INFO  [stdout]         set
11:54:44,100 INFO  [stdout]             tasks=? 
11:54:44,100 INFO  [stdout]         where
11:54:44,100 INFO  [stdout]             id_user=? 
...
11:54:44,157 INFO  [stdout]     /* update
11:54:44,157 INFO  [stdout]         my.User */ update
11:54:44,157 INFO  [stdout]             user 
11:54:44,157 INFO  [stdout]         set
11:54:44,157 INFO  [stdout]             tasks=? 
11:54:44,158 INFO  [stdout]         where
11:54:44,158 INFO  [stdout]             id_user=? 
{code}

*If I replace this:*

@Column(name = "tasks")
@Convert(converter = TasksConverter.class)
private Map<Task, String> tasks;

*with this (using string instead of enum as key):*

{code:java}
@Column(name = "tasks")
@Convert(converter = TasksConverter.class)
private Map<String, String> tasks;
{code}


then all works AND no two needless update statements are produces.








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