org.netbeans.api.db.explorer.DatabaseException: ??????????? ????? ???????????
        at org.netbeans.modules.db.explorer.infos.TableListNodeInfo.initChildren(TableListNodeInfo.java:110)
        at org.netbeans.modules.db.explorer.infos.DatabaseNodeInfo.getChildren(DatabaseNodeInfo.java:688)
        at org.netbeans.modules.db.explorer.nodes.DatabaseNode$DatabaseNodeChildFactory.createKeys(DatabaseNode.java:382)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:147)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
java.sql.SQLException: ??????????? ????? ???????????
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
        at oracle.jdbc.driver.OracleResultSetImpl.getString(OracleResultSetImpl.java:382)
        at org.netbeans.lib.ddl.impl.DriverSpecification.getRow(DriverSpecification.java:230)
        at org.netbeans.modules.db.explorer.infos.TableListNodeInfo.initChildren(TableListNodeInfo.java:96)
        at org.netbeans.modules.db.explorer.infos.DatabaseNodeInfo.getChildren(DatabaseNodeInfo.java:688)
        at org.netbeans.modules.db.explorer.nodes.DatabaseNode$DatabaseNodeChildFactory.createKeys(DatabaseNode.java:382)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:147)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)