How to Upgrade MariaDB from Ubuntu-18.04 to Ubuntu-20.04

Beyond Here

  Environment
    u1804 : Ubuntu-18.04
    u2004 : Ubuntu-20.04

If you convert MariaDB from Ubuntu-18.04 to Ubuntu-20.04, you can see error message

Row size too large (> 8126). Changing some columns to TEXT or BLOB or using ROW_FORMAT=DYNAMIC or ROW_FORMAT=COMPRESSED may help.

In current row format, BLOB prefix of 768 bytes is stored inline

1. Change Row type from Compact to Dynamic