SHOW CHARACTER SET

SHOW CHARACTER SET 语句提供 TiDB 中可用字符集的静态列表。此列表不反映当前连接或用户的任何属性。

语法图

ShowCharsetStmt

SHOW CHARACTER SET - 图1

ShowLikeOrWhere

SHOW CHARACTER SET - 图2

  1. ShowCharsetStmt ::=
  2.     "SHOW" ( ("CHARACTER" | "CHAR") "SET" | "CHARSET" ) ShowLikeOrWhere?
  4. ShowLikeOrWhere ::=
  5.     "LIKE" SimpleExpr
  6. |   "WHERE" Expression

示例

  1. SHOW CHARACTER SET;
  1. +---------+---------------+-------------------+--------+
  2. | Charset | Description   | Default collation | Maxlen |
  3. +---------+---------------+-------------------+--------+
  4. | utf8    | UTF-8 Unicode | utf8_bin          |      3 |
  5. | utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
  6. | ascii   | US ASCII      | ascii_bin         |      1 |
  7. | latin1  | Latin1        | latin1_bin        |      1 |
  8. | binary  | binary        | binary            |      1 |
  9. +---------+---------------+-------------------+--------+
  10. 5 rows in set (0.00 sec)
  1. SHOW CHARACTER SET LIKE 'utf8%';
  1. +---------+---------------+-------------------+--------+
  2. | Charset | Description   | Default collation | Maxlen |
  3. +---------+---------------+-------------------+--------+
  4. | utf8    | UTF-8 Unicode | utf8_bin          |      3 |
  5. | utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
  6. +---------+---------------+-------------------+--------+
  7. 2 rows in set (0.00 sec)
  1. SHOW CHARACTER SET WHERE Description='UTF-8 Unicode';
  1. +---------+---------------+-------------------+--------+
  2. | Charset | Description   | Default collation | Maxlen |
  3. +---------+---------------+-------------------+--------+
  4. | utf8    | UTF-8 Unicode | utf8_bin          |      3 |
  5. | utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
  6. +---------+---------------+-------------------+--------+
  7. 2 rows in set (0.00 sec)

MySQL 兼容性

SHOW CHARACTER SET 语句功能与 MySQL 完全兼容。注意，TiDB 中字符集的默认排序规则与 MySQL 有所不同，具体可以参考与 MySQL 兼容性对比。如发现任何兼容性差异，请尝试 TiDB 支持资源。

另请参阅