public override void VisitColumnReference(ColumnReference columnReference) { var identifiers = columnReference.Identifiers; identifiers = MemberUtils.RemoveAlias(_previousStage, identifiers); Expression expression; if (_inAggregateFunction) { expression = MemberUtils.GetMemberGroupByInValue(_previousStage, identifiers, _visitorMetadata.OperationsProvider, out var property); AddUsedProperty(property); } else { expression = MemberUtils.GetMemberGroupByInKey(_previousStage, identifiers, _visitorMetadata.OperationsProvider, out var property); AddUsedProperty(property); } AddExpressionToStack(expression); AddNameToStack(string.Join(".", identifiers)); }