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
if ( isEqualString( dataSourceDesign.getBeforeOpenScript( ),
				dataSourceDesign2.getBeforeOpenScript( ) ) == false
				|| isEqualString( dataSourceDesign.getAfterOpenScript( ),
						dataSourceDesign2.getAfterOpenScript( ) ) == false
				|| isEqualString( dataSourceDesign.getBeforeCloseScript( ),
						dataSourceDesign2.getBeforeCloseScript( ) ) == false
				|| isEqualString( dataSourceDesign.getAfterCloseScript( ),
						dataSourceDesign2.getAfterCloseScript( ) ) == false )
			return false;
		if ( dataSourceDesign instanceof IOdaDataSourceDesign
				&& dataSourceDesign2 instanceof IOdaDataSourceDesign )
		{
			IOdaDataSourceDesign dataSource = (IOdaDataSourceDesign) dataSourceDesign;
			IOdaDataSourceDesign dataSource2 = (IOdaDataSourceDesign) dataSourceDesign2;
			if ( isEqualString( dataSource.getExtensionID( ),
					dataSource2.getExtensionID( ) ) == false )
				return false;
			if ( isEqualProps( dataSource.getPublicProperties( ),
					dataSource2.getPublicProperties( ) ) == false
					|| isEqualProps( dataSource.getPrivateProperties( ),
							dataSource2.getPrivateProperties( ) ) == false )
				return false;
		}
		else if ( dataSourceDesign instanceof IScriptDataSourceDesign
				&& dataSourceDesign2 instanceof IScriptDataSourceDesign )
		{
			IScriptDataSourceDesign dataSource = (IScriptDataSourceDesign) dataSourceDesign;
			IScriptDataSourceDesign dataSource2 = (IScriptDataSourceDesign) dataSourceDesign2;
			if ( isEqualString( dataSource.getOpenScript( ),
					dataSource2.getOpenScript( ) ) == false