Bug 161191 Null is inserted when drag columns to query text with ctrl key pressed
Description: Null is inserted when drag columns to query text with ctrl key pressed Steps to reproduce: 1. New a data source. 2. New a dataset. 3. Press and hold ctrl key, select OFFICECODE and CITY columns, drag to query text. Expected result: "CLASSICMODELS.OFFICES.OFFICECODE,CLASSICMODELS.OFFICES.CITY" is inserted in query text. Actual result: "null,CLASSICMODELS.OFFICES.OFFICECODE,CLASSICMODELS.OFFICES.CITY" is inserted
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
schemaImage = JFaceResources.getImage( SCHEMA_ICON );
		dataBaseImage = JFaceResources.getImage( DATABASE_ICON );
		columnImage = JFaceResources.getImage( COLUMN_ICON );
	}
	/**
	 *  Initializes the Jdbc related information , used  by this page
	 * ( such as the Jdbc Connection , Catalog Name etc )
	 *
	 */
	protected void initialJdbcInfo( )
	{
		createMetaDataProvider( );
		jdbcConnection = connectMetadataProvider( metaDataProvider,
				this.getDataSetDesign( ).getDataSourceDesign( ) );
		try
		{
			if ( jdbcConnection != null )
			{
				
				isSchemaSupported = metaDataProvider.isSchemaSupported( );
			}
		}
		catch ( Exception e )
		{
			ExceptionHandler.showException( this.getShell( ),
					JdbcPlugin.getResourceString( "exceptionHandler.title.error" ),
					e.getLocalizedMessage( ),
					e );
		}
	}