information_schema.engines.engine

mysql

type: VARCHAR NOT NULL
5.7-8

mariadb

type: NULL
Note:
Name of the storage engine.
© 2022 MariaDB
5.1-10.8
type: VARCHAR NOT NULL
Note:
Name of the storage engine.
© 2022 MariaDB
10.2-10.7

tidb

type: VARCHAR(64) NULL
4-6.1

postgres

cockroachdb

mssql