`information_schema.schemata_extensions.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`schemata_extensions`
	`catalog_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`options`	`VARCHAR NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`schema_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported