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/impl/QueryExecutor.java
}
		dataSet = null;
		dataSource = null;
		logger.logp( Level.FINER,
				QueryExecutor.class.getName( ),
				"close",
				"executor closed " );
	}
	/*
	 * @see org.eclipse.birt.data.engine.impl.IQueryExecutor#getDataSet()
	 */
	public DataSetRuntime getDataSet( )
	{
		return dataSet;
	}
	/*
	 * @see org.eclipse.birt.data.engine.impl.IQueryExecutor#getSharedScope()
	 */
	public Scriptable getSharedScope( )
	{
		return this.sharedScope;
	}
	/**
	 * Gets the Javascript scope for evaluating expressions for this query
	 * 
	 * @return
	 */
	public Scriptable getQueryScope( )
	{
		if ( queryScope == null )