`information_schema.innodb_foreign.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`innodb_foreign`
	`for_name`	`VARCHAR NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`id`	`VARCHAR NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`n_cols`	`BIGINT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`ref_name`	`VARCHAR NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`type`	`BIGINT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported