`information_schema.column_udt_usage.column_name`

mysql

mariadb

tidb

postgres

type: SQL_IDENTIFIER NULL

Note:

Name of the column

© 1996-2022 The PostgreSQL Global Development Group

10-15

type: SQL_IDENTIFIER

Note:

Name of the column

© 1996-2022 The PostgreSQL Global Development Group

7.4-9.6

cockroachdb

type: unknown

Note:

Name of the column.

© 2022 CockroachDB

20.2-21.2

mssql