information_schema.system_variables.variable_comment

mysql

mariadb

type: NULL
Note:
Help text, usually shown in mysqld --help --verbose.
© 2022 MariaDB
10.1-10.8
type: VARCHAR NOT NULL
Note:
Help text, usually shown in mysqld --help --verbose.
© 2022 MariaDB
10.2-10.7

tidb

postgres

cockroachdb

mssql