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The CHARACTER_SETS table provides information about character sets. Currently, TiDB only supports some of the character sets.
USE INFORMATION_SCHEMA;DESC CHARACTER_SETS;
The output is as follows:
+----------------------+-------------+------+------+---------+-------+| 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)
View the CHARACTER_SETS table:
SELECT * FROM `CHARACTER_SETS`;
The output is as follows:
+--------------------+----------------------+-------------------------------------+--------+| CHARACTER_SET_NAME | DEFAULT_COLLATE_NAME | DESCRIPTION | MAXLEN |+--------------------+----------------------+-------------------------------------+--------+| ascii | ascii_bin | US ASCII | 1 || binary | binary | binary | 1 || gbk | gbk_chinese_ci | Chinese Internal Code Specification | 2 || latin1 | latin1_bin | Latin1 | 1 || utf8 | utf8_bin | UTF-8 Unicode | 3 || utf8mb4 | utf8mb4_bin | UTF-8 Unicode | 4 |+--------------------+----------------------+-------------------------------------+--------+6 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_NAMEThe default collation name of the character set.DESCRIPTIONThe description of the character set.MAXLENThe maximum length required to store a character in this character set.
