In oracle 10g (or 11g - tried both) i have two tables:

CREATE TABLE TP_SUB_TYP
( ID NUMBER(11,0) DEFAULT 1 NOT NULL ENABLE,
NAME VARCHAR2(512 BYTE),
PRIMARY KEY (ID)
);

CREATE TABLE TP_SUBSTYP
( ID NUMBER(11,0) DEFAULT 1 NOT NULL ENABLE,
NAME VARCHAR2(512 BYTE),
PRIMARY KEY (ID)
);

And when I try to view these tables in eclipse i get:

org.jboss.tools.hibernate.spi.HibernateException: Duplicate names found for primarykey. Existing name: SYS_C00123041 JDBC name: SYS_C00123039 on table org.hibernate.mapping.Table(TP_SUB_TYP)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter$2.execute(LazyDatabaseSchemaWorkbenchAdapter.java:138)
at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:108)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter.readDatabaseSchema(LazyDatabaseSchemaWorkbenchAdapter.java:125)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter.getChildren(LazyDatabaseSchemaWorkbenchAdapter.java:65)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:104)
at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:238)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

This problem will not happen if the names of two tables will be like TP_SUB_TYP_1 and TP_SUB_TYP_2 - but i cannot rename tables.