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

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 -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Is-this-a-bug-when-us... Sent from the Drools - User mailing list archive at Nabble.com.