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
private int currRowBytes = 0;
	private boolean rowStart = true;
	
	/**
	 * @param currIndex
	 * @param exprID
	 * @param exprValue
	 */
	public void saveExprValue( int currIndex, String exprID, Object exprValue )
			throws DataException
	{
		initSave( false );
		if ( currIndex != lastRowIndex )
		{
			try
			{
				if ( currIndex > 0 )
					this.currRowBytes += 4;
				
				saveEndOfCurrRow( lastRowIndex, currIndex );
			}
			catch ( IOException e )
			{
				throw new DataException( ResourceConstants.RD_SAVE_ERROR,
						e,
						"Result Data" );
			}
			lastRowIndex = currIndex;
		}