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/PreparedDataSourceQuery.java
* @throws DataException
	 */
	PreparedDataSourceQuery( DataEngineImpl dataEngine,
			IQueryDefinition queryDefn, IBaseDataSetDesign dataSetDesign,
			Map appContext )
			throws DataException
	{
		this.dataSetDesign = dataSetDesign;
		this.queryDefn = queryDefn;
		this.dataEngine = dataEngine;
		
		preparedQuery = new PreparedQuery( dataEngine.getContext( ),
				dataEngine.getExpressionCompiler( ),
				dataEngine.getSharedScope( ),
				queryDefn,
				this,
				appContext );
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.api.IPreparedQuery#getReportQueryDefn()
	 */
	public IQueryDefinition getReportQueryDefn()
	{
		return this.queryDefn;
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.impl.IPreparedQueryService#getDataSourceQuery()
	 */