将一个表从postgresql绑定到Netbeans中设计表中的表后，我收到以下错误：
run:
[EL Info]: 2013-10-04 10:51:36.097--ServerSession(865393238)--EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507-3faac2b
[EL Info]: connection: 2013-10-04 10:51:36.701--ServerSession(865393238)--file:/D:/Doodle Notes Database/Doodle Notes Projects/build/classes/_DoodleNotesPU login successful
[EL Warning]: 2013-10-04 10:51:37.119--UnitOfWork(1785038318)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: cross-database references are not implemented: "doodlenotes.public.projects"
Position: 139
Error Code: 0
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: cross-database references are not implemented: "doodlenotes.public.projects"
Call: SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects
Position: 139
Error Code: 0
Query: ReadAllQuery(referenceClass=Projects sql="SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects")
Call: SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects
Query: ReadAllQuery(referenceClass=Projects sql="SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects")
at org.eclipse.persistence.internal.jpa.QueryImpl.getDetailedException(QueryImpl.java:377)
at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:260)
at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:468)
at Doodle.doodleNotes_Business.initComponents(doodleNotes_Business.java:26)
at Doodle.doodleNotes_Business.<init>(doodleNotes_Business.java:11)
at Doodle.doodleNotes_Business.main(doodleNotes_Business.java:311)
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: cross-database references are not implemented: "doodlenotes.public.projects"
Position: 139
Error Code: 0
Call: SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects
Query: ReadAllQuery(referenceClass=Projects sql="SELECT project_code, member_incharge, project_category, project_client, project_genre, project_name, project_package, project_status FROM DoodleNotes.public.projects")
at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:340)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:679)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:558)
at org.eclipse.persistence.internal.sessions.AbstractSession.basicExecuteCall(AbstractSession.java:1995)
at org.eclipse.persistence.sessions.server.ServerSession.executeCall(ServerSession.java:570)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:242)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:228)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:299)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:694)
at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRowsFromTable(ExpressionQueryMechanism.java:2714)
at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2667)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:477)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1155)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1114)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:402)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1202)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2894)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1797)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1779)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1744)
at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:258)
... 4 more
Caused by: org.postgresql.util.PSQLException: ERROR: cross-database references are not implemented: "doodlenotes.public.projects"
Position: 139
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2157)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1886)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:555)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:302)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeSelect(DatabaseAccessor.java:1002)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:641)
... 24 more
Java Result: 1
BUILD SUCCESSFUL (total time: 5 seconds)
我该怎么做才能解决错误？
答案 0 :(得分：1)
我对IntelliJ IDEA和Hybernate也有同样的错误，
引起：org.postgresql.util.PSQLException：错误：未实现跨数据库引用：＆＃34; mydb.public.media_types＆＃34;
与你的相同，
引起：org.postgresql.util.PSQLException：错误：未实现跨数据库引用：＆＃34; doodlenotes.public.projects＆＃34;
我已经找到了解决方案，但是我想也是如此，我的解决方案就是从我的hbm.xml文件中删除名为catalog的属性。
之前：
`<class name="pkg.MediaTypesEntity" table="media_types" schema="public"` catalog="MyDB">
后：
<!-- catalog="MyDB" --removed -->
<class name="pkg.MediaTypesEntity" table="media_types" schema="public">
<!-- catalog="MyDB" --removed -->
<id name="id">
<column name="id" sql-type="serial" not-null="true"/>
</id>
<property name="txt">
<column name="txt" sql-type="text" length="2147483647"/>
</property>
</class>
我认为原因是数据库名称是在hibernate.cfg.xml中全局配置的。
<hibernate-configuration>
<session-factory>
<property name="connection.url">jdbc:postgresql://localhost:5432/MyDB</property>
<property name="connection.driver_class">org.postgresql.Driver</property>
<mapping resource="pkg/MediaTypesEntity.hbm.xml"/>
<mapping class="pkg.MediaTypesEntity"/>
</session-factory>
</hibernate-configuration>
而且，真正的原因，MyDB名称无法轻易从JDBC连接字符串中删除。只允许几个不同的hibernate-DBName.cfg.xml。 有关详细信息，请参阅这些链接：
hibernate-using-two-different-database-schemas-in-the-same-application