`information_schema.sql_implementation_info.*`

show items implemented by

any at least two only one database all databases

relation	column	mysql	mariadb	tidb	postgres	cockroachdb	mssql
`sql_implementation_info`
	`character_value`	unsupported	unsupported	unsupported	`CHARACTER_DATA`: 7.4-9.6 `CHARACTER_DATA NULL`: 10-15	unsupported	unsupported
	`comments`	unsupported	unsupported	unsupported	`CHARACTER_DATA`: 7.4-9.6 `CHARACTER_DATA NULL`: 10-15	unsupported	unsupported
	`implementation_info_id`	unsupported	unsupported	unsupported	`CHARACTER_DATA`: 7.4-9.6 `CHARACTER_DATA NULL`: 10-15	unsupported	unsupported
	`implementation_info_name`	unsupported	unsupported	unsupported	`CHARACTER_DATA`: 7.4-9.6 `CHARACTER_DATA NULL`: 10-15	unsupported	unsupported
	`integer_value`	unsupported	unsupported	unsupported	`CARDINAL_NUMBER`: 7.4-9.6 `CARDINAL_NUMBER NULL`: 10-15	unsupported	unsupported