`information_schema.user_defined_types.character_maximum_length`

mysql

mariadb

tidb

postgres

type: CARDINAL_NUMBER NULL

Note:

Applies to a feature not available in PostgreSQL

© 1996-2022 The PostgreSQL Global Development Group

10-15

type: CARDINAL_NUMBER

Note:

Applies to a feature not available in PostgreSQL

© 1996-2022 The PostgreSQL Global Development Group

9.2-9.6

cockroachdb

mssql