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/impl/document/RDSave.java
}
			}
			catch ( IOException e )
			{
				throw new DataException( ResourceConstants.RD_SAVE_ERROR,
						e,
						"Result Set" );
			}
		}
	}
	
	/**
	 * @throws DataException
	 */
	private void saveForIV( ) throws DataException
	{
		this.saveExprMetadata( );
		this.saveTransform( );
	}
	
	/**
	 * @throws DataException
	 */
	private void saveExprMetadata( ) throws DataException
	{
		OutputStream outputStream = context.getOutputStream( queryResultID,
				subQueryID,
				DataEngineContext.EXPR_META_STREAM );
		ExprMetaUtil.saveExprMetaInfo( queryDefn, outputStream );
		try