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/QueryExecutor.java
}
	/**
	 * 
	 * @param expr
	 * @return
	 */
	private String getColumnRefExpression(String expr) 
	{
		return "row[\""+ expr + "\"]";
	}
	
	/**
	 * 
	 * @param cx
	 * @param dataSetFilters
	 * @param queryFilters
	 * @param temporaryComputedColumns
	 * @return
	 */
	private List prepareFilters(Context cx, List dataSetFilters, List queryFilters,
			List temporaryComputedColumns) {
		List result = new ArrayList();
		prepareFilter(cx, dataSetFilters, temporaryComputedColumns, result);
		prepareFilter(cx, queryFilters, temporaryComputedColumns, result);
		return result;
	}
	/**
	 * 
	 * @param cx
	 * @param dataSetFilters