Bug 140705 Insert group does not work properly when cache preference is set
When cache preference is set, insert group does not work properly. Steps to reproduce problem: In Birt report designer: New a report design, data source, data set; Insert a table, drag several columns into table; Set cache preference for data set: check checkbox "Cache dataset data for report view"; Select "Cache and use first [] rows"; Enter '100' as row count. PREVIEW report; Insert group, Preview report again ---> problem happens: only header line will show up. All details are missing. Sample report is also attached.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/DataSourceAndDataSet.java
}
	/**
	 * @param computedCol1
	 * @param computedCol2
	 * @return
	 */
	private boolean isEqualComputedColumns( List computedCol1, List computedCol2 )
	{
		if ( computedCol1 == computedCol2 )
			return true;
		int basicCol = isEqualBasicCol( computedCol1, computedCol2 );
		if ( basicCol == B_TRUE )
			return true;
		else if ( basicCol == B_FALSE )
			return false;
		Iterator it = computedCol1.iterator( );
		Iterator it2 = computedCol1.iterator( );
		while ( it.hasNext( ) )
		{
			IComputedColumn cc = (IComputedColumn) it.next( );
			IComputedColumn cc2 = (IComputedColumn) it2.next( );
			if ( isEqualComputedCol( cc, cc2 ) == false )
				return false;
		}
		return true;
	}
	/**
	 * @param cc
	 * @param cc2
	 * @return