`information_schema.collation_character_set_applicability.character_set_catalog`

mysql

type: SQL_IDENTIFIER NULL

Note:

Character sets are currently not implemented as schema objects, so this column is null

10-15

type: SQL_IDENTIFIER

Note:

Character sets are currently not implemented as schema objects, so this column is null

9.1-9.6

type: unknown

Note:

Always NULL (unsupported by CockroachDB).