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
{
	/**
	 * Index of the the parent group, i.e., the immediate outer group that this
	 * group belongs to
	 */
	int parent = -1;
	/**
	 * Index of the first child group. If the current group is the innermost
	 * group, this is the ID of the first data row in the group
	 */
	int firstChild = -1;
}
/**
 * Structure to hold a group instance with its startIndex, endIndex, filter
 * result, sortKeys and Sort directions.
 * 
 */
final class GroupBoundaryInfo