`information_schema.table_constraints_extensions.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`table_constraints_extensions`
	`constraint_catalog`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`constraint_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`constraint_schema`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`engine_attribute`	`JSON NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`secondary_engine_attribute`	`JSON NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported
	`table_name`	`VARCHAR NOT NULL`: 8	unsupported	unsupported	unsupported	unsupported	unsupported