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/impl/QueryExecutor.java
* @return
	 */
	abstract protected DataSetRuntime newDataSetRuntime( )
			throws DataException;
	
	/**
	 * Create a new unopened odiDataSource given the data source runtime
	 * definition
	 * 
	 * @return
	 */
	abstract protected IDataSource createOdiDataSource( )
			throws DataException;
	
	/**
	 * Create an empty instance of odi query
	 * 
	 * @return
	 */
	abstract protected IQuery createOdiQuery( ) throws DataException;
	
	/**
	 * Prepares the ODI query
	 */
	protected void prepareOdiQuery( ) throws DataException
	{
	}
	
	/**
	 * Executes the ODI query to reproduce a ODI result set