Bug 202038 errors occurred when preview the attached design file.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/binding/FeaturesTest.java
{
		String testSQL = "select COUNTRY, CITY from " + getTestTableName( );
		( (OdaDataSetDesign) this.dataSet ).setQueryText( testSQL );
		
		QueryDefinition queryDefn = newReportQuery( );
		IPreparedQuery preparedQuery = dataEngine.prepare( queryDefn );
		IQueryResults queryResults = preparedQuery.execute( null );
		IResultMetaData metadata = queryResults.getResultMetaData( );
		assertEquals( "VARCHAR", metadata.getColumnNativeTypeName( 1 ) );
		assertEquals( "VARCHAR", metadata.getColumnNativeTypeName( 2 ) );
	}
	/**
	 * @throws Exception
	 */
	public void testPassThruContext() throws Exception
	{
		String testSQL =  "select COUNTRY, CITY from " + getTestTableName( );
		((OdaDataSetDesign)this.dataSet).setQueryText( testSQL );
		
		String[] bindingNameRow = new String[]{
				"ROW_COUNTRY",
				"ROW_CITY"
		};
		IBaseExpression[] bindingExprRow = new IBaseExpression[]{
				new ScriptExpression( "dataSetRow.COUNTRY", 0 ),
				new ScriptExpression( "dataSetRow.CITY", 0 )
		};
		
		QueryDefinition queryDefn = this.createQuery( null,
				null,