[rules-users] Is this a bug? when using Human Task.

[XiaoMiTang]

When use the Human Task,some tables were created in DB automatic,but one SQL
statement  occured error is this:

create table Notification_EmailNotificationHeader 
(
   Notification_id numeric(19,0) not null, 
   emailHeaders_id numeric(19,0) not null, 
   mapkey varchar(255) null, 
   primary key (Notification_id, mapkey), 
  unique (emailHeaders_id)
)

the mapkey is nullable,can not be defined as primary key~
Is this a bug? or something wrong with my development enviroment?
Eclipse + tomcat + MS SQL Server2008
Mina 2.0(hibernate-core-3.3.0.SP1.jar)

persistence.xml is this:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence
    version="1.0"
    xsi:schemaLocation=
      "http://java.sun.com/xml/ns/persistence
       http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
       http://java.sun.com/xml/ns/persistence/orm
       http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
    xmlns:orm="http://java.sun.com/xml/ns/persistence/orm"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/persistence">

  <persistence-unit name="org.drools.task">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <class>org.drools.task.Attachment</class>
    <class>org.drools.task.Content</class>
    <class>org.drools.task.BooleanExpression</class>
    <class>org.drools.task.Comment</class>
    <class>org.drools.task.Deadline</class>
    <class>org.drools.task.Comment</class>
    <class>org.drools.task.Deadline</class>
    <class>org.drools.task.Delegation</class>
    <class>org.drools.task.Escalation</class>
    <class>org.drools.task.Group</class>
    <class>org.drools.task.I18NText</class>
    <class>org.drools.task.Notification</class>
    <class>org.drools.task.EmailNotification</class>
    <class>org.drools.task.EmailNotificationHeader</class>
    <class>org.drools.task.PeopleAssignments</class>
    <class>org.drools.task.Reassignment</class>
    <class>org.drools.task.Status</class>
    <class>org.drools.task.Task</class>
    <class>org.drools.task.TaskData</class>
    <class>org.drools.task.SubTasksStrategy</class>
    <class>org.drools.task.OnParentAbortAllSubTasksEndStrategy</class>
    <class>org.drools.task.OnAllSubTasksEndParentEndStrategy</class>
    <class>org.drools.task.User</class>

    <properties>
      <property name="hibernate.dialect"
value="org.hibernate.dialect.SQLServerDialect"/>
      <property name="hibernate.connection.driver_class"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
      <property name="hibernate.connection.url"
value="jdbc:sqlserver://192.168.101.91:1433;DatabaseName=BinTest" />
      <property name="hibernate.connection.username" value="sa"/>
      <property name="hibernate.connection.password" value="sa"/>
      <property name="hibernate.connection.autocommit" value="false" />
      <property name="hibernate.max_fetch_depth" value="3"/>
      <property name="hibernate.hbm2ddl.auto" value="create" />
      <property name="hibernate.show_sql" value="true" />
    </properties>
  </persistence-unit>
</persistence>

Can anyone help?
XiaoMiTang


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