Bug 192332 Engine does not set values for parameters in a data extraction task
Engine does not set values for parameters in a data extraction task. So if a query binds a paramter, we can not get correct data from document.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTaskV1.java
return rsetList;
		}
		return resultMetaList;
	}
	/**
	 * get the metadata of a result set.
	 * 
	 * @param rsetName
	 * @return
	 */
	protected IResultMetaData getResultMetaData( String rsetName )
	{
		Iterator iter = resultMetaList.iterator( );
		while ( iter.hasNext( ) )
		{
			IResultSetItem rsetItem = (IResultSetItem) iter.next( );
			if ( rsetItem.getResultSetName( ).equals( rsetName ) )
			{
				return rsetItem.getResultMetaData( );
			}
		}
		return null;
	}
	public void selectColumns( String[] columnNames )
	{
		selectedColumns = columnNames;
	}
	public IExtractionResults extract( ) throws EngineException
	{
		try