collation_server 
=====================================

collation_server 用于设置服务器默认字符集和字符序。


| **属性**  |                                                                                                                                                                                                                                                                                               **描述**                                                                                                                                                                                                                                                                                                |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 参数类型    | string                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 默认值     | utf8mb4_general_ci                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| 取值范围    | * utf8mb4_general_ci   * utf8mb4_bin   * utf8mb4_unicode_ci   * gbk_bin   * gbk_chinese_ci   * gb18030_bin   * gb18030_chinese_ci   * utf16_general_ci   * utf16_bin   * utf16_unicode_ci   * binary    |
| 生效范围    | * GLOBAL   * SESSION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| 是否参与序列化 | 是                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| 是否可以为空  | 是                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |