`information_schema.innodb_datafiles.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`innodb_datafiles`
	`path`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`space`	`VARBINARY NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported