`information_schema.character_sets.default_collate_catalog`

mysql

type: SQL_IDENTIFIER NULL

Note:

Name of the database containing the default collation (always the current database, if any collation is identified)

10-15

type: SQL_IDENTIFIER

Note:

Name of the database containing the default collation (always the current database, if any collation is identified)

9.1-9.6

type: unknown

Note:

Name of the database containing the default collation (if any collation is identified, always the current database).