{"id":16986,"date":"2017-06-23T22:17:59","date_gmt":"2017-06-23T13:17:59","guid":{"rendered":"https:\/\/jirak.net\/wp\/mysql8-0-%e6%97%a5%e6%9c%ac%e8%aa%9e%e3%81%aeutf8bm4%e3%81%aecollation%e6%96%87%e5%ad%97%e7%85%a7%e5%90%88%e9%a0%86\/"},"modified":"2017-06-23T23:35:12","modified_gmt":"2017-06-23T14:35:12","slug":"mysql8-0-%e6%97%a5%e6%9c%ac%e8%aa%9e%e3%81%aeutf8bm4%e3%81%aecollation%e6%96%87%e5%ad%97%e7%85%a7%e5%90%88%e9%a0%86","status":"publish","type":"post","link":"https:\/\/jirak.net\/wp\/mysql8-0-%e6%97%a5%e6%9c%ac%e8%aa%9e%e3%81%aeutf8bm4%e3%81%aecollation%e6%96%87%e5%ad%97%e7%85%a7%e5%90%88%e9%a0%86\/","title":{"rendered":"MySQL8.0: \u65e5\u672c\u8a9e\u306eutf8bm4\u306eCollation(\u6587\u5b57\u7167\u5408\u9806)"},"content":{"rendered":"

MySQL8.0: \u65e5\u672c\u8a9e\u306eutf8bm4\u306eCollation(\u6587\u5b57\u7167\u5408\u9806)<\/p>\n

MySQL 8.0.1\u3067\u306f\u3001utf8mb4\u306e\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u304a\u3088\u3073\u30a2\u30af\u30bb\u30f3\u30c8\u8a18\u53f7\u4ed8\u304d\u306e\u6587\u5b57\u3092\u5224\u5225\u3059\u308bas_cs collation<\/a>\u306b\u52a0\u3048\u3066\u3001\u65e5\u672c\u8a9e\u7528\u306eCollation(\u6587\u5b57\u7167\u5408\u9806)\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002<\/p>\n

utf8mb4_ja_0900_as_cs<\/tt>\u306b\u3064\u3044\u3066<\/h2>\n

\u65e5\u672c\u8a9e\u306b\u95a2\u3059\u308b\u6587\u5b57\u7167\u5408\u304a\u3088\u3073\u30bd\u30fc\u30c8\u306e\u30eb\u30fc\u30eb\u306f\u8907\u96d1\u3067\u3059\u3002\u65e5\u672c\u8a9e\u3067\u306f\u3072\u3089\u304c\u306a\u3001\u30ab\u30bf\u30ab\u30ca\u3001\u6f22\u5b57\u3001\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8(\u30e9\u30c6\u30f3\u6587\u5b57)\u3092\u6df7\u5728\u3055\u305b\u3066\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u5168\u89d2\u3068\u534a\u89d2\u304c\u5b58\u5728\u3059\u308b\u6587\u5b57\u3082\u3042\u308a\u307e\u3059\u3002\u3067\u306f\u3001\u2018\u3042\u2019, \u2018\u30a2\u2019, \u2018a\u2019, \u2018\uff71\u2019\u306f\u3069\u306e\u3088\u3046\u306b\u30bd\u30fc\u30c8\u3055\u308c\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n

Unicode\u7167\u5408\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/a>(UCA \/ Unicode Collation Algorithm)\u306e\u4e2d\u3067\u898f\u5b9a\u3055\u308c\u3066\u3044\u308b\u30c7\u30d5\u30a9\u30eb\u30c8Unicode\u7167\u5408\u57fa\u672c\u30c6\u30fc\u30d6\u30eb(DUCET \/ Default Unicode Collation Element Table)\u306b\u3066Unicode\u6587\u5b57\u5217\u306e\u6bd4\u8f03\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306eDUCET\u306f\u8a00\u8a9e\u3054\u3068\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3055\u308c\u305f\u60c5\u5831\u3092XML\u5f62\u5f0f\u3067\u63d0\u4f9b\u3059\u308b\u5171\u901a\u30ed\u30b1\u30fc\u30eb\u30c7\u30fc\u30bf\u30ea\u30dd\u30b8\u30c8\u30ea(CLDR, Common Locale Data Repository)\u306b\u3066\u3001\u65e5\u672c\u8a9e\u306b\u95a2\u3059\u308b\u30bd\u30fc\u30c8\u9806\u3092\u5b9a\u7fa9\u3057\u305f\u90e8\u5206[reorder Latn Kana Hani]\u3067\u306e\u65e5\u672c\u8a9e\u306b\u95a2\u3059\u308b\u30bd\u30fc\u30c8\u9806\u306e\u30eb\u30fc\u30eb\u306b\u3088\u308b\u3068\u3001\u30e9\u30c6\u30f3\u6587\u5b57\u306f\u5168\u3066\u306e\u3072\u3089\u304c\u306a\u3084\u30ab\u30bf\u30ab\u30ca\u3088\u308a\u3082\u524d\u306b\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u2018a\u2019\u304c\u6700\u521d\u3068\u306a\u308a\u307e\u3059\u3002\u3067\u306f\u6b8b\u308a\u306e\u2018\u3042\u2019, \u2018\u30a2\u2019, \u2018\uff71\u2019\u306f\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u3053\u3067\u306f\u4ee5\u4e0b\u306e\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u307e\u3059: \u2018&\u3042<<<<\u30a2=\uff71\u2019<\/p>\n

mysql> set names utf8mb4;\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\nmysql> select strcmp('a', '\u3042' collate utf8mb4_ja_0900_as_cs);\r\n+--------------------------------------------------+\r\n| strcmp('a', '\u3042' collate utf8mb4_ja_0900_as_cs)  |\r\n+--------------------------------------------------+\r\n| -1                                               |\r\n+--------------------------------------------------+\r\n1 row in set (0.00 sec)\r\n\r\nmysql> select strcmp('\u3042', '\u30a2' collate utf8mb4_ja_0900_as_cs);\r\n+----------------------------------------------------+\r\n| strcmp('\u3042', '\u30a2' collate utf8mb4_ja_0900_as_cs)    |\r\n+----------------------------------------------------+\r\n| 0                                                  |\r\n+----------------------------------------------------+\r\n1 row in set (0.00 sec)\r\n\r\n\r\nmysql> select strcmp('\u30a2', '\uff71' collate utf8mb4_ja_0900_as_cs);\r\n+----------------------------------------------------+\r\n| strcmp('\u30a2', '\uff71' collate utf8mb4_ja_0900_as_cs)     |\r\n+----------------------------------------------------+\r\n| 0                                                  |\r\n+----------------------------------------------------+\r\n1 row in set (0.00 sec)<\/pre>\n
\u306a\u305c\u2018\u3042\u2019, \u2018\u30a2\u2019, \u2018\uff71\u2019\u306f\u7b49\u4fa1\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1fUCA\u3067\u306f\u30de\u30eb\u30c1\u30ec\u30d9\u30eb\u306e\u6bd4\u8f03\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/a>\u3092\u4f7f\u7528\u3057\u3066\u7167\u5408\u3092\u500b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6bd4\u8f03\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e4\u6b21\u30ec\u30d9\u30eb\u3067\u306f\u2018\u3042\u2019\u304c\u2018\u30a2\u2019\u3088\u308a\u3082\u524d\u306b\u6765\u308b\u3068\u3055\u308c\u3066\u3044\u308b\u306b\u3082\u95a2\u308f\u3089\u305a\u3067\u3059\u3002\u30dd\u30a4\u30f3\u30c8\u306fCLDR\u3067\u306f\u65e5\u672c\u8a9e\u306e\u6587\u5b57\u7167\u5408\u9806\u306e\u5f37\u5ea6\u306f3\u6b21\u30ec\u30d9\u30eb\u3067\u3042\u308b\u3068\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5f93\u3063\u30664\u6b21\u30ec\u30d9\u30eb\u3067\u306e\u5dee\u306f\u7121\u8996\u3055\u308c\u308b\u3053\u3068\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30e6\u30fc\u30b6\u30fc\u306e\u671f\u5f85\u3057\u305f\u6319\u52d5\u3067\u306f\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u6211\u3005\u306f\u65e5\u672c\u8a9e\u3092\u6271\u3046MySQL\u30e6\u30fc\u30b6\u30fc\u306e\u8981\u671b\u3092\u3082\u3068\u306b\u3057\u305fCollation\u3092MySQL 8.0\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u65e5\u672c\u5de5\u696d\u898f\u683c\u306e\u4e00\u3064JIS X 0208 (http:\/\/www.jisc.go.jp\/app\/pager?id=94516<\/a>)\u3067\u306f\u3001\u65e5\u672c\u8a9e\u306e\u6f22\u5b576,355\u6587\u5b57\u3068\u305d\u306e\u30bd\u30fc\u30c8\u9806\u306b\u3064\u3044\u3066\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002utf8mb4_ja_0900_as_cs\u306f\u3053\u306eJIS X 0208\u306b\u6e96\u3058\u305f\u6f22\u5b57\u306e\u30bd\u30fc\u30c8\u3092\u884c\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3053\u306eJIS X 0208\u3067\u306f\u542b\u307e\u308c\u306a\u3044\u6f22\u5b57\u3082\u591a\u6570\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6f22\u5b57\u306b\u3064\u3044\u3066utf8mb4_ja_0900_as_cs\u306fUCA(Unicode Collation Algorithm)\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u305d\u308c\u305e\u308c\u306e\u6587\u5b57\u306e\u91cd\u307f(implicit weight) (http:\/\/www.unicode.org\/reports\/tr10\/#Implicit_Weights<\/a>)\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u6587\u5b57\u3092\u4f8b\u306b\u30bd\u30fc\u30c8\u9806\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3059: \u2018\u738b\u2019, \u2018\u4eba\u2019, \u2018\u5175\u2019, \u2018\ufa0e\u2019, \u2018\u3400\u2019
\n\u6700\u521d\u306e3\u6587\u5b57\u306fJIS X 0208\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u6b8b\u308a\u306e2\u6587\u5b57\u306f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n
mysql> create table jpn(a varchar(10)) collate utf8mb4_ja_0900_as_cs;\r\nQuery OK, 0 rows affected (0.90 sec)\r\n\r\nmysql> insert into jpn values ('\u738b'), ('\ufa0e'), ('\u4eba'), ('\u3400'), ('\u5175');\r\nQuery OK, 5 rows affected (0.05 sec)\r\nRecords: 5 Duplicates: 0 Warnings: 0\r\n\r\nmysql> select a from jpn order by a;\r\n+------+\r\n| a    |\r\n+------+\r\n| \u738b   |\r\n| \u4eba   |\r\n| \u5175   |\r\n| \ufa0e   |\r\n| \u3400   |\r\n+------+\r\n5 rows in set (0.02 sec)<\/pre>\n<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u3053\u306e\u8a18\u4e8b\u4ee5\u5916\u306b\u3082MySQL 8.0\u306b\u304a\u3051\u308bUTF-8\u306e\u6539\u826f\u306b\u95a2\u3059\u308b\u8a18\u4e8b\u3092\u3053\u308c\u307e\u3067\u306b\u3082\u516c\u958b\u3057\u3066\u304a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306b\u3064\u3044\u3066\u3082\u305c\u3072\u3054\u53c2\u7167\u4e0b\u3055\u3044\u3002<\/p>\n