It was my mistake, I misremembered MariaDB, but can't edit my comment now. In my defense, I've barely thought of it since 2009, when it was forked.
On the other hand, I've worked with MySQL a few times in the same period, mostly because Oracle, whatever its failings, has kept MySQL alive. Not thriving, but alive. I'm so glad they didn't buy PostgreSQL.
MariaDB.