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 ( isEqualParameterBindings( this.parameterBindings,
						parameterBindings2 ) )
					return true;
			}
			else if ( this.dataSetDesign == null || dataSetDesign2 == null )
			{
				return false;
			}
		}
		else if ( this.dataSourceDesign == null || dataSourceDesign2 == null )
		{
			return false;
		}
		else
		{
			if ( ( this.dataSetDesign != dataSetDesign2 )
					&& ( this.dataSetDesign == null || dataSetDesign2 == null ) )
				return false;
		}
		
		if ( isEqualDataSourceDesign( dataSourceDesign, dataSourceDesign2 ) == false )
			return false;
		
		if ( isEqualDataSetDesign( dataSetDesign, dataSetDesign2 ) == false )
			return false;
		
		if ( this.isEqualParameterBindings( this.parameterBindings,
				parameterBindings2 ) == false )
			return false;