Hello Igor, Please check out this: https://github.com/MariaDB/server/tree/bb-10.8-mdev26996-no-sel-arg-ascendin... This is a patch that removes SEL_ARG::is_ascending. Does it make the code better in your opinion? BR Sergei -- Sergei Petrunia, Software Developer MariaDB Corporation | Skype: sergefp | Blog: http://petrunia.net