`information_schema.columns.domain_catalog`

mysql

type: SQL_IDENTIFIER NULL

Note:

If the column has a domain type, the name of the database that the domain is defined in (always the current database), else null.

10-15

type: SQL_IDENTIFIER

Note:

If the column has a domain type, the name of the database that the domain is defined in (always the current database), else null.

7.4-9.6

type: unknown

Note:

Always NULL (unsupported by CockroachDB).

type: NVARCHAR(128) NULL

Note:

If the column is an alias data type, this column is the database name in which the user-defined data type was created. Otherwise, NULL is returned.