Bug 201013 [Automation][Regression]Invalid group key column name: _{$TEMP_GROUP_1$} occurs when preview attached report[1102]
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/dscache/CandidateQuery.java
{
	
	private DataSetResultCache datasetCache;
	private DataEngineSession session;
	
	public CandidateQuery( DataEngineSession session )
	{
		this.session = session;
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.odi.ICandidateQuery#getResultClass()
	 */
	public IResultClass getResultClass( ) throws DataException
	{