CHARACTER_SETS

The CHARACTER_SETS table provides information about character sets. Currently, TiDB only supports some of the character sets.

USE information_schema; DESC character_sets;
+----------------------+-------------+------+------+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------------------+-------------+------+------+---------+-------+ | CHARACTER_SET_NAME | varchar(32) | YES | | NULL | | | DEFAULT_COLLATE_NAME | varchar(32) | YES | | NULL | | | DESCRIPTION | varchar(60) | YES | | NULL | | | MAXLEN | bigint(3) | YES | | NULL | | +----------------------+-------------+------+------+---------+-------+ 4 rows in set (0.00 sec)
SELECT * FROM `character_sets`;
+--------------------+----------------------+---------------+--------+ | CHARACTER_SET_NAME | DEFAULT_COLLATE_NAME | DESCRIPTION | MAXLEN | +--------------------+----------------------+---------------+--------+ | utf8 | utf8_bin | UTF-8 Unicode | 3 | | utf8mb4 | utf8mb4_bin | UTF-8 Unicode | 4 | | ascii | ascii_bin | US ASCII | 1 | | latin1 | latin1_bin | Latin1 | 1 | | binary | binary | binary | 1 | +--------------------+----------------------+---------------+--------+ 5 rows in set (0.00 sec)

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

  • CHARACTER_SET_NAME: The name of the character set.
  • DEFAULT_COLLATE_NAME The default collation name of the character set.
  • DESCRIPTION The description of the character set.
  • MAXLEN The maximum length required to store a character in this character set.