`information_schema.innodb_virtual.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`innodb_virtual`
	`base_pos`	`INT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`pos`	`INT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`table_id`	`BIGINT NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported