org.netbeans.api.db.explorer.DatabaseException: ???????????? ???????? ??? ??????? ??????? ???????.
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:167)
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:78)
        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$Processor.run(RequestProcessor.java:997)
java.sql.SQLException: ???????????? ???????? ??? ??????? ??????? ???????.
        at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:0)
        at org.apache.derby.client.am.SqlException.getSQLException(SqlException.java:0)
        at org.apache.derby.client.am.ResultSet.getString(ResultSet.java:0)
        at org.netbeans.lib.ddl.impl.DriverSpecification.getRow(DriverSpecification.java:230)
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:111)
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:78)
        at org.netbeans.modules.db.explorer.infos.DatabaseNodeInfo.getChildren(DatabaseNodeInfo.java:688)
        at org.netbeans.modules.db.explorer.nodes.DatabaseNode$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)
org.apache.derby.client.am.SqlException: ???????????? ???????? ??? ??????? ??????? ???????.
        at org.apache.derby.client.am.ResultSet.checkForValidCursorPosition(ResultSet.java:0)
        at org.apache.derby.client.am.ResultSet.checkGetterPreconditions(ResultSet.java:0)
        at org.apache.derby.client.am.ResultSet.getString(ResultSet.java:0)
        at org.netbeans.lib.ddl.impl.DriverSpecification.getRow(DriverSpecification.java:230)
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:111)
        at org.netbeans.modules.db.explorer.infos.TableNodeInfo.initChildren(TableNodeInfo.java:78)
        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)