information_schema.views.security_type

mysql

type: VARCHAR NULL
8
type: VARCHAR NOT NULL
5.7

mariadb

type: NULL
Note:
SQL SECURITY characteristic, either DEFINER or INVOKER.
© 2022 MariaDB
5.1-10.8
type: VARCHAR NOT NULL
Note:
SQL SECURITY characteristic, either DEFINER or INVOKER.
© 2022 MariaDB
10.2-10.7

tidb

type: VARCHAR(7) NOT NULL
Note:
The value of SQL SECURITY. The value options are DEFINER and INVOKER.
© 2022 PingCAP
4-6.1

postgres

cockroachdb

mssql