used to return MYSQL_LONG_LONG in 10.2 in result set metadata, but
and changed to MYSQL_LONG UNSIGNED in 10.3
We need to track the changes between the versions, so there are not many potentially breaking changes in the future.
as noted in
MDEV-16347, changing types can break client programs
In 10.3, according to Bar,
MDEV-12619 caused all functions that used to return 64bit now can return 32bit, and those are over 50, and this breaking change went almost undocumented.