this.metaData = metaData;
if( null == selectedColumns) { this.metaData = metaData; } else { this.metaData = new ResultMetaData( metaData, selectedColumns ); }
	ExtractionResults( IQueryResults queryResults, IResultMetaData metaData, String[] selectedColumns )	{		this.selectedColumns = selectedColumns;		this.queryResults = queryResults;		this.metaData = metaData;	}