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/executor/transform/group/GroupCalculationUtil.java
this.endIndex = end;
		sortKeys = new Object[0];
	}
	/**
	 * Return the start index.
	 * 
	 * @return
	 */
	int getStartIndex( )
	{
		return this.startIndex;
	}
	/**
	 * Return the end index.
	 * 
	 * @return
	 */
	int getEndIndex( )
	{
		return this.endIndex;
	}
	/**
	 * Detect whether the given GroupBoundaryInfo consists of the startIdx and
	 * endIdx that included in current GroupBoundaryInfo instance.
	 * 
	 * @param gbi
	 * @return
	 */
	boolean isInBoundary( GroupBoundaryInfo gbi )
	{