`information_schema.innodb_foreign_cols.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`innodb_foreign_cols`
	`for_col_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`id`	`VARCHAR NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`pos`	`INT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`ref_col_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported