`information_schema.column_udt_usage.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`column_udt_usage`
	`column_name`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`table_catalog`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`table_name`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`table_schema`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`udt_catalog`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`udt_name`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported
	`udt_schema`	unsupported	unsupported	unsupported	`SQL_IDENTIFIER`: 7.4-9.6 `SQL_IDENTIFIER NULL`: 10-15	20.2-21.2	unsupported