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
{
		IBaseExpression expr = filter.getExpression( );
		if ( expr instanceof IConditionalExpression )
		{
			if ( !ExpressionCompilerUtil.isValidExpressionInQueryFilter( expr ) )
				throw new DataException( ResourceConstants.INVALID_DEFINITION_IN_FILTER,
						new Object[]{
							( (IConditionalExpression) expr ).getExpression( ).getText( )
						} );
			try
			{
				if ( odiQuery instanceof BaseQuery )
				{
					return ( (BaseQuery) odiQuery ).getExprProcessor( )
								.hasAggregation( expr );
				}
			}
			catch ( DataException e )
			{
				return true;
			}
		}
		return false;
	}
	/*
	 * @see org.eclipse.birt.data.engine.impl.IQueryExecutor#getResultMetaData()
	 */
	public IResultMetaData getResultMetaData( ) throws DataException
	{
		assert odiQuery instanceof IPreparedDSQuery