Bug 131011 Support running query based on report document data
Data Engine should support running a query based on data set and expression data stored in a report document. This bugzilla entry serves as a repository for design docs and notes related to this feature.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/group/GroupCalculationUtil.java
}
		this.rsMeta = rsMeta;
		this.smartCache = rsCache;
	}
	/**
	 * 
	 * @return
	 */
	public GroupInformationUtil getGroupInformationUtil( )
	{
		return this.groupInformationUtil;
	}
	/**
	 * @param inputStream
	 */
	public void doSave( OutputStream outputStream )
	{
		try
		{
			this.groupInformationUtil.saveGroupsToStream( outputStream );
		}
		catch ( IOException e )
		{
			e.printStackTrace( );
		}
	}
	/**
	 * Everytime in CachedResultSet the result set cache changed, it must be
	 * reset to GroupCalculationUtil. Set the value of smartCache.
	 *