字符集与时区

最近更新时间:2018-10-29 15:12:41

如果您期望阅读或下载全量开发文档,请参考 《TDSQL 开发指南》

字符集和时区

TDSQL 在后端存储支持 MySQL 的所有字符集和字符序,此处只是列举,并不代表此处有差异

    mysql> show character set;
    +----------+---------------------------------+---------------------+--------+
    | Charset  | Description                     | Default collation   | Maxlen |
    +----------+---------------------------------+---------------------+--------+
    | big5     | Big5 Traditional Chinese        | big5_chinese_ci     |      2 |
    | dec8     | DEC West European               | dec8_swedish_ci     |      1 |
    | cp850    | DOS West European               | cp850_general_ci    |      1 |
    | hp8      | HP West European                | hp8_english_ci      |      1 |
    | koi8r    | KOI8-R Relcom Russian           | koi8r_general_ci    |      1 |
    | latin1   | cp1252 West European            | latin1_swedish_ci   |      1 |
    | latin2   | ISO 8859-2 Central European     | latin2_general_ci   |      1 |
    | swe7     | 7bit Swedish                    | swe7_swedish_ci     |      1 |
    | ascii    | US ASCII                        | ascii_general_ci    |      1 |
    | ujis     | EUC-JP Japanese                 | ujis_japanese_ci    |      3 |
    | sjis     | Shift-JIS Japanese              | sjis_japanese_ci    |      2 |
    | hebrew   | ISO 8859-8 Hebrew               | hebrew_general_ci   |      1 |
    | tis620   | TIS620 Thai                     | tis620_thai_ci      |      1 |
    | euckr    | EUC-KR Korean                   | euckr_korean_ci     |      2 |
    | koi8u    | KOI8-U Ukrainian                | koi8u_general_ci    |      1 |
    | gb2312   | GB2312 Simplified Chinese       | gb2312_chinese_ci   |      2 |
    | greek    | ISO 8859-7 Greek                | greek_general_ci    |      1 |
    | cp1250   | Windows Central European        | cp1250_general_ci   |      1 |
    | gbk      | GBK Simplified Chinese          | gbk_chinese_ci      |      2 |
    | latin5   | ISO 8859-9 Turkish              | latin5_turkish_ci   |      1 |
    | armscii8 | ARMSCII-8 Armenian              | armscii8_general_ci |      1 |
    | utf8     | UTF-8 Unicode                   | utf8_general_ci     |      3 |
    | ucs2     | UCS-2 Unicode                   | ucs2_general_ci     |      2 |
    | cp866    | DOS Russian                     | cp866_general_ci    |      1 |
    | keybcs2  | DOS Kamenicky Czech-Slovak      | keybcs2_general_ci  |      1 |
    | macce    | Mac Central European            | macce_general_ci    |      1 |
    | macroman | Mac West European               | macroman_general_ci |      1 |
    | cp852    | DOS Central European            | cp852_general_ci    |      1 |
    | latin7   | ISO 8859-13 Baltic              | latin7_general_ci   |      1 |
    | utf8mb4  | UTF-8 Unicode                   | utf8mb4_general_ci  |      4 |
    | cp1251   | Windows Cyrillic                | cp1251_general_ci   |      1 |
    | utf16    | UTF-16 Unicode                  | utf16_general_ci    |      4 |
    | utf16le  | UTF-16LE Unicode                | utf16le_general_ci  |      4 |
    | cp1256   | Windows Arabic                  | cp1256_general_ci   |      1 |
    | cp1257   | Windows Baltic                  | cp1257_general_ci   |      1 |
    | utf32    | UTF-32 Unicode                  | utf32_general_ci    |      4 |
    | binary   | Binary pseudo charset           | binary              |      1 |
    | geostd8  | GEOSTD8 Georgian                | geostd8_general_ci  |      1 |
    | cp932    | SJIS for Windows Japanese       | cp932_japanese_ci   |      2 |
    | eucjpms  | UJIS for Windows Japanese       | eucjpms_japanese_ci |      3 |
    | gb18030  | China National Standard GB18030 | gb18030_chinese_ci  |      4 |
    +----------+---------------------------------+---------------------+--------+
    41 rows in set (0.02 sec)

查看当前连接的字符集:

    mysql> show variables like "%char%";
    +--------------------------+-----------------------------------------------------+
    | Variable_name            | Value                                               |
    +--------------------------+-----------------------------------------------------+
    | character_set_client     | latin1                                              |
    | character_set_connection | latin1                                              |
    | character_set_database   | utf8                                                |
    | character_set_filesystem | binary                                              |
    | character_set_results    | latin1                                              |
    | character_set_server     | utf8                                                |
    | character_set_system     | utf8                                                |
    | character_sets_dir       | /data/tdsql_run/8812/percona-5.7.17/share/charsets/ |
    +--------------------------+-----------------------------------------------------+

设置当前连接相关的字符集:

    mysql> set names utf8;
    Query OK, 0 rows affected (0.03 sec)

    mysql> show variables like "%char%";
    +--------------------------+-----------------------------------------------------+
    | Variable_name            | Value                                               |
    +--------------------------+-----------------------------------------------------+
    | character_set_client     | utf8                                                |
    | character_set_connection | utf8                                                |
    | character_set_database   | utf8                                                |
    | character_set_filesystem | binary                                              |
    | character_set_results    | utf8                                                |
    | character_set_server     | utf8                                                |
    | character_set_system     | utf8                                                |
    | character_sets_dir       | /data/tdsql_run/8811/percona-5.7.17/share/charsets/ |
    +--------------------------+-----------------------------------------------------+

注意:TDSQL 不支持通过命令行设置参数,请到云控制台进行设置

支持通过设置 time_zone 变量修改时区相关的属性

    mysql> show variables like '%time_zone%';
    +------------------+--------+
    | Variable_name    | Value  |
    +------------------+--------+
    | system_time_zone | CST    |
    | time_zone        | SYSTEM |
    +------------------+--------+
    2 rows in set (0.00 sec)

    mysql> create table test.tt (ts timestamp, dt datetime,c int) shardkey=c;
    Query OK, 0 rows affected (0.49 sec)

    mysql>  insert into test.tt (ts,dt,c)values ('2017-10-01 12:12:12', '2017-10-01 12:12:12',1);
    Query OK, 1 row affected (0.09 sec)

    mysql> select * from test.tt;
    +---------------------+---------------------+------+
    | ts                  | dt                  | c    |
    +---------------------+---------------------+------+
    | 2017-10-01 12:12:12 | 2017-10-01 12:12:12 |    1 |
    +---------------------+---------------------+------+
    1 row in set (0.04 sec)

    mysql> set time_zone = '+12:00';
    Query OK, 0 rows affected (0.00 sec)

    mysql> show variables like '%time_zone%';
    +------------------+--------+
    | Variable_name    | Value  |
    +------------------+--------+
    | system_time_zone | CST    |
    | time_zone        | +12:00 |
    +------------------+--------+
    2 rows in set (0.00 sec)

    mysql> select * from test.tt;
    +---------------------+---------------------+------+
    | ts                  | dt                  | c    |
    +---------------------+---------------------+------+
    | 2017-10-01 16:12:12 | 2017-10-01 12:12:12 |    1 |
    +---------------------+---------------------+------+
    1 row in set (0.06 sec)