Bug 139365 The result of grouping is wrong
Description: The result of grouping is wrong. Step to reproduce: Steps to reproduce: 1. New a report. 2. Create a data source and a data set based on the report. 3. Drag the dataset to the layout, and set two groups on the table. The first level group information: Group key: CITY Interval type: prefix Range: 1 The second level group information: Group key: CUSTOMERNUMBER Interval type: Interval Range: 4 4. Save and preview. (Please refer to the attached design file) Actual result: The result of grouping is wrong. Expected result: In the second level group, the CUSTOMERNUMBER 157, 303, 357, 323 shouldnt in a group. They must be regard as single group according to the conditional of the second level group.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/group/GroupBy.java
{
	private int columnIndex;
	private String columnName;
	private GroupSpec groupSpec;
	/**
	 * Static method to create and instance of subclass of GroupBy, based on the
	 * group definition
	 * 
	 * @param groupDefn
	 * @param columnIndex
	 * @param columnType
	 * @return GroupBy
	 * @throws DataException
	 */
	public static GroupBy newInstance( GroupSpec groupDefn, int columnIndex, String columnName,
			Class columnType ) throws DataException
	{
		assert groupDefn != null;
		GroupBy groupBy = null;
		switch ( groupDefn.getInterval( ) )
		{