COLLATION_CHARACTER_SET_APPLICABILITY

The COLLATION_CHARACTER_SET_APPLICABILITY table maps collations to the applicable character set name. Similar to the COLLATIONS table, it is included only for compatibility with MySQL.

USE information_schema; DESC collation_character_set_applicability;
+--------------------+-------------+------+------+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------------+-------------+------+------+---------+-------+ | COLLATION_NAME | varchar(32) | NO | | NULL | | | CHARACTER_SET_NAME | varchar(32) | NO | | NULL | | +--------------------+-------------+------+------+---------+-------+ 2 rows in set (0.00 sec)
SELECT * FROM collation_character_set_applicability WHERE character_set_name='utf8mb4';
+----------------+--------------------+ | COLLATION_NAME | CHARACTER_SET_NAME | +----------------+--------------------+ | utf8mb4_bin | utf8mb4 | +----------------+--------------------+ 1 row in set (0.00 sec)

The description of columns in the COLLATION_CHARACTER_SET_APPLICABILITY table is as follows:

  • COLLATION_NAME: The name of the collation.
  • CHARACTER_SET_NAME: The name of the character set which the collation belongs to.