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
|| isEqualString( dataSource.getCloseScript( ),
							dataSource2.getCloseScript( ) ) == false )
				return false;
		}
		return true;
	}
	/**
	 * compare data set design
	 * @param dataSetDesign
	 * @param dataSetDesign2
	 * @return
	 */
	private boolean isEqualDataSetDesign( IBaseDataSetDesign dataSetDesign,
			IBaseDataSetDesign dataSetDesign2 )
	{
		if ( dataSetDesign == dataSetDesign2 )
			return true;
		if ( dataSetDesign == null || dataSetDesign2 == null )
			return false;
		if ( isEqualString( dataSetDesign.getBeforeOpenScript( ),
				dataSetDesign2.getBeforeOpenScript( ) ) == false
				|| isEqualString( dataSetDesign.getAfterOpenScript( ),
						dataSetDesign2.getAfterOpenScript( ) ) == false
				|| isEqualString( dataSetDesign.getBeforeCloseScript( ),
						dataSetDesign2.getBeforeCloseScript( ) ) == false
				|| isEqualString( dataSetDesign.getAfterCloseScript( ),
						dataSetDesign2.getAfterCloseScript( ) ) == false )
			return false;
		if ( isEqualComputedColumns( dataSetDesign.getComputedColumns( ),
				dataSetDesign2.getComputedColumns( ) ) == false