MDEV-37932: Parser support for FULL OUTER JOIN syntax#4408

DaveGosselin-MariaDB wants to merge 1 commit into12.2-mdev-36813-full-outer-joinMariaDB/server:12.2-mdev-36813-full-outer-joinfrom

12.3-MDEV-37932-full-outer-join-syntaxMariaDB/server:12.3-MDEV-37932-full-outer-join-syntaxCopy head branch name to clipboard