Greetings, Hope you are safe and doing great, This post describes the things I've done during 22-28 June for Coding phase-1 under the mentor-ship of Sergei Golubchik and Oleksandr Byelkin for GSoC-20 to implement MDEV-12326. The tasks taken up for this week was to work towards validating the fields of the return list, requested by the client when it uses *multi-table DELETE....RETURNING *or* multi-table UPDATE....RETURNING*. If an invalid column name is requested in the return list then it should result in displaying: *ERROR 1054 (42S22): Unknown column '<invalid column>' in 'field list' *. Things I learnt while implementing this was, firstly that *setup_fields* and *setup_wild* functions validate the *returning_item_list* i.e. column names, expressions, etc. in *RETURNING* statement and understood that validation is done implicitly. Moreover, *setup_returning_fields* method could also be used interchangeably. Secondly, if we have to completely run a .test file that has many failing test cases then we should provide --force option twice, as in*:* *./mtr <file_name> --force --force. * I've also written and recorded the result for the above usecase, for *multi-table DELETE.... RETURNING *and will also do the same for *multi-table UPDATE.... RETURNING v*ery soon. All in all coding phase-1 was really informative and I would like to thank *MariaDB Foundation* for having me. All the code is uploaded up to date in these remote repositories, please feel free to comment. MULTI-TABLE UPDATE RETURNING: https://github.com/MariaDB/server/compare/10.5...MohammedHMateen:MDEV-12326-... MULTI-TABLE DELETE RETURNING: https://github.com/MariaDB/server/compare/10.5...MohammedHMateen:MDEV-12326-... Thank you Regards, Mohammed Hammaad Mateen