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/RDLoad.java
{
			throw new DataException( ResourceConstants.RD_LOAD_ERROR,
					e,
					"Result Data" );
		}
		if ( exprValueMap.containsKey( expr.getID( ) ) == false )
			throw new DataException( ResourceConstants.RD_EXPR_INVALID_ERROR );
		return exprValueMap.get( expr.getID( ) );
	}
	/**
	 * @param name
	 * @return
	 * @throws DataException
	 */
	Object getValue( String name ) throws DataException
	{
		try
		{
			if ( readIndex < currPos )
			{
				this.skipTo( currPos - 1 );
				this.initCurrentRow( );
			}
			readIndex = currPos;
		}
		catch ( IOException e )
		{
			throw new DataException( ResourceConstants.RD_LOAD_ERROR,
					e,
					"Result Data" );