Thanks Ian, I've started going through the functions.
On https://mariadb.com/kb/en/mariadb/st_convexhull/, the note says
"ST_ConvexHull() was introduced in MariaDB 10.1.2" -- per your last
email, it sounds like that means that ConvexHull (no ST_) should've been
in MariaDB in all versions.
Since MySQL didn't add ConvexHull until 5.7.5, I'm wondering if
* I'm misinterpreting that,
* MariaDB really did have ConvexHull since the start
* MySQL's docs are off and it did have it previously
* MariaDB's docs are off and ConvexHull was also added in 10.1.2
Also, MySQL 5.7.6 deprecated several functions, including ConvexHull()
-- are any functions currently deprecated in MariaDB, and if so, are
they noted as such? Or would that come in a future version?
Once again, thanks for your help!