Bug 153387 Database item can't be dragged and dropped onto editor field
Steps to reproduce: 1.Start up BIRT in Mac OS X; 2.File->New->Project; 3.File->New->Report Design; 4.In Data Explorer, create a New Data Source, and choose "Classic Models Inc. Sample DataBase", press "Next" and then press "finish"; 5.In Data Explorer, create a New Data Set, press "Next"; 6.In the popup window, expand the "CLASSICMODELS", select and drag a item onto the editor field at right side.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
}
	
	/**
	 * Gets the list of schema objects
	 */
	private void getAvailableSchema( )
	{
		if ( isSchemaSupported )
		{
			ResultSet schemas = metaDataProvider.getAllSchema( );
			schemaList = getAllSchemaList( schemas );
		}
	}
	
	/**
	 * 
	 * @param schemaName
	 * @param schemaTreeItem
	 */
	protected void populateTableList( String schemaName ,TreeItem schemaTreeItem )
	{
		if ( schemaTreeItem != null )
		{
			removeTreeItem( schemaTreeItem );
		}
		String namePattern = null;
		String[] tableType = null;
		cachedSearchTxt = searchTxt.getText( );
		namePattern = SQLUtility.getTailoredSearchText( searchTxt.getText( ) );