Bug 144403 Jion include scripted dataset the result set is not list in the data explorer
Description; Jion include scripted dataset, the result set is not list in the data explorer Step to reproduce: Refer to the design file attached. Jioned with any scripted dataset will cause the problem. Actual result: Refer to the screenshot.
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/impl/DataSetMetaDataHelper.java
{
					ResultSetColumn rsc = StructureFactory.createResultSetColumn( );
					rsc.setColumnName( getColumnName( rsMeta, i ) );
					rsc.setDataType( toModelDataType( rsMeta.getColumnType( i ) ) );
					rsc.setPosition( new Integer( i ) );
					dataSetHandle.getCachedMetaDataHandle( )
							.getResultSet( )
							.addItem( rsc );
				}
			}
			
			if ( dataSetHandle instanceof ScriptDataSetHandle == false )
				dataSetHandle.getPropertyHandle( DataSetHandle.RESULT_SET_PROP )
						.clearValue( );
		}
		if ( e != null )
			throw e;
		return rsMeta;
	}
	/**
	 * 
	 * @param dataSetHandle
	 * @param rsMeta
	 * @return
	 * @throws BirtException
	 */
	private boolean needsSetCachedMetaData( DataSetHandle dataSetHandle,
			IResultMetaData rsMeta ) throws BirtException
	{
		if ( dataSetHandle.getCachedMetaDataHandle( ) == null