{"id":278,"date":"2013-07-29T14:34:19","date_gmt":"2013-07-29T06:34:19","guid":{"rendered":"http:\/\/www.gpfeng.com\/?p=278"},"modified":"2013-08-23T23:08:37","modified_gmt":"2013-08-23T15:08:37","slug":"mysql-16%e8%bf%9b%e5%88%b6%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%8e%e7%bc%96%e7%a0%81","status":"publish","type":"post","link":"http:\/\/www.gpfeng.com\/?p=278","title":{"rendered":"MySQL 16\u8fdb\u5236\u5b57\u7b26\u4e32\u4e0e\u7f16\u7801"},"content":{"rendered":"

\u5b9e\u9a8c\uff1a<\/h3>\n

a) \u7cfb\u7edf\u73af\u5883\uff1a<\/h4>\n
\r\n$echo $LANG\r\nen_US.UTF-8\r\n<\/pre>\n
\r\nCREATE TABLE `t1` (\r\n  `id` int(11) NOT NULL AUTO_INCREMENT,\r\n  `str` varchar(128) CHARACTER SET utf8 DEFAULT NULL,\r\n  PRIMARY KEY (`id`)\r\n) ENGINE=InnoDB\r\n<\/pre>\n
<\/p>\n
b) set names latin1;<\/h4>\n
\r\nmysql> set names latin1;\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\nmysql> insert into t1(str) values('\u6625\u7720');\r\nQuery OK, 1 row affected (0.00 sec)\r\n\r\nmysql> insert into t1(str) values(x'E698A5E79CA0');\r\nQuery OK, 1 row affected (0.00 sec)\r\n\r\nmysql> select * from t1;\r\n+----+--------+\r\n| id | str    |\r\n+----+--------+\r\n|  1 | \u6625\u7720 |\r\n|  2 | ??     |\r\n+----+--------+\r\n2 rows in set (0.00 sec)\r\n\r\nmysql> select id,hex(str) from t1;\r\n+----+--------------------------+\r\n| id | hex(str)                 |\r\n+----+--------------------------+\r\n|  1 | C3A6CB9CC2A5C3A7C593C2A0 |\r\n|  2 | E698A5E79CA0             |\r\n+----+--------------------------+\r\n2 rows in set (0.00 sec)\r\n<\/pre>\n
c) set names utf8;<\/h4>\n
\r\nmysql> set names utf8;\r\nQuery OK, 0 rows affected (0.00 sec)\r\n\r\nmysql> select * from t1;\r\n+----+--------------+\r\n| id | str          |\r\n+----+--------------+\r\n|  1 | \u00e6\u02dc\u00a5\u00e7\u0153  |\r\n|  2 | \u6625\u7720       |\r\n+----+--------------+\r\n2 rows in set (0.00 sec)\r\n\r\nmysql> select id,hex(str) from t1;\r\n+----+--------------------------+\r\n| id | hex(str)                 |\r\n+----+--------------------------+\r\n|  1 | C3A6CB9CC2A5C3A7C593C2A0 |\r\n|  2 | E698A5E79CA0             |\r\n+----+--------------------------+\r\n2 rows in set (0.00 sec)\r\n\r\nmysql> insert into t1(str) values('\u6625\u7720');\r\nQuery OK, 1 row affected (0.00 sec)\r\n\r\nmysql> insert into t1(str) values(x'E698A5E79CA0');\r\nQuery OK, 1 row affected (0.00 sec)\r\n\r\nmysql> select * from t1;\r\n+----+--------------+\r\n| id | str          |\r\n+----+--------------+\r\n|  1 | \u00e6\u02dc\u00a5\u00e7\u0153  |\r\n|  2 | \u6625\u7720       |\r\n|  3 | \u6625\u7720       |\r\n|  4 | \u6625\u7720       |\r\n+----+--------------+\r\n4 rows in set (0.00 sec)\r\n\r\nmysql> select id,hex(str) from t1;\r\n+----+--------------------------+\r\n| id | hex(str)                 |\r\n+----+--------------------------+\r\n|  1 | C3A6CB9CC2A5C3A7C593C2A0 |\r\n|  2 | E698A5E79CA0             |\r\n|  3 | E698A5E79CA0             |\r\n|  4 | E698A5E79CA0             |\r\n+----+--------------------------+\r\n4 rows in set (0.00 sec)\r\n<\/pre>\n
\u5206\u6790\uff1a<\/h3>\n
E698A5E79CA0\u662f\u4e2d\u6587\u2018\u6625\u6653\u2019\u7684UTF8\u7f16\u7801<\/p>\n
\u7528vim\u4ee5utf8\u7f16\u8f91\u4e2d\u6587’\u6625\u7720’\u4fdd\u5b58\/tmp\/utf8<\/p>\n
\r\n$hexdump -C \/tmp\/utf8\r\n00000000  e6 98 a5 e7 9c a0                              |.......|\r\n00000007\r\n<\/pre>\n
\u5c06utf8\u6587\u4ef6\u8f6c\u7801\u6210latin1\u540e\u67e5\u770b\uff1a<\/p>\n
\r\n$iconv -f latin1 -t utf8 \/tmp\/utf8 |hexdump -C\r\n00000000  c3 a6 c2 98 c2 a5 c3 a7  c2 9c c2 a0           |.............|\r\n0000000d\r\n<\/pre>\n
\u5373\uff0cset names latin1\u4e0b\uff0c’\u6625\u6653’\u7684utf8\u7f16\u7801E698A5E79CA0\u88ab\u89c6\u4e3alatin1\u7f16\u7801\uff0c\u5c06\u5176\u8f6c\u6210utf8\u7f16\u7801\u540e\u53d8\u6210\uff1aC3A6CB9CC2A5C3A7C593C2A0\uff0c\u800c\u8bfb\u53d6\u65f6\u4e5f\u53ea\u80fd\u5728set names latin1\u4e0b\u624d\u80fd\u6b63\u786e<\/p>\n
\u7ed3\u8bba\uff1a<\/h3>\n
1\u3001\u4ee5x’hexstring’\u65b9\u5f0f\u53d1\u9001\u7684SQL\u5c06\u4e0d\u4f1a\u8fdb\u884c\u8f6c\u7801(\u5ffd\u7565set names)\uff0c\u4f46\u662f\u4f1a\u68c0\u67e516\u8fdb\u5236\u7f16\u7801\u662f\u5426\u6ee1\u8db3\u6821\u9a8c\u96c6COLLATION<\/p>\n
\r\nmysql> insert into t1(str) values(x'B4BAC3DF');\r\nQuery OK, 1 row affected, 1 warning (0.00 sec)\r\n\r\nmysql> show warnings;\r\n+---------+------+----------------------------------------------------------------------+\r\n| Level   | Code | Message                                                              |\r\n+---------+------+----------------------------------------------------------------------+\r\n| Warning | 1366 | Incorrect string value: '\\xB4\\xBA\\xC3\\xDF' for column 'str' at row 1 |\r\n+---------+------+----------------------------------------------------------------------+\r\n1 row in set (0.00 sec)\r\n<\/pre>\n
PS\uff1ax’B4BAC3DF’\u662f’\u6625\u7720’\u7684GBK\u7f16\u7801<\/p>\n
2\u3001\u5373\u4f7f\u5199\u5165\u7684\u5b57\u7b26\u4e32\u7f16\u7801\u65b9\u5f0f\uff08latin1\uff09\u4e0e\u8868\u5b9a\u4e49\uff08\u5b58\u50a8\uff09\u7f16\u7801\u65b9\u5f0f\uff08utf8\uff09\u4e0d\u540c\uff0c\u53ea\u8981\u8bfb\u548c\u5199\u4f7f\u7528\u7684\u662f\u540c\u4e00\u79cd\u7f16\u7801\u65b9\u5f0f\u5c31\u80fd\u6b63\u786e\u8bfb\u53d6\u6570\u636e\uff0c\u4ee3\u4ef7\u662fmysql\u4f1a\u989d\u5916\u8f6c\u7801<\/p>\n
\u4e00\u4e2a\u5e94\u7528\u573a\u666f<\/h3>\n
a) \u573a\u666f\u63cf\u8ff0<\/h4>\n
\u5728\u4e0a\u7bc7\u6587\u7ae0MySQL binlog\u5b57\u7b26\u7f16\u7801\u65b9\u5f0f<\/a>\u4e2d\u63d0\u5230\u4e86\u4f7f\u7528mysqlbinlog\u7684\u89e3\u6790\u7ed3\u679c\u56de\u6eda\u5386\u53f2\u4fee\u6539\uff0c\u6dd8\u5b9d\u667a\u80dc\u7684\u60f3\u6cd5\u5f88\u76f4\u63a5\uff1a\u9006\u5e8f\u6267\u884c\u2018\u53cd\u8f6cbinlog\u2019\uff08INSERT–>DELETE, DELETE–>INSERT, UPDATE–>swap WHERE and SET\uff09<\/p>\n
\r\nmysqldump -v \/path\/to\/mysql-bin.000001|grep ^###\r\n<\/pre>\n
\r\n### INSERT INTO test.t1\r\n### SET\r\n###   @1=13\r\n###   @2='\u6625\u7720\u4e0d\u89c9\u6653'\r\n### UPDATE test.t1\r\n### WHERE\r\n###   @1=13\r\n###   @2='\u6625\u7720\u4e0d\u89c9\u6653'\r\n### SET\r\n###   @1=13\r\n###   @2='\u6625\u7720'\r\n### DELETE FROM test.t1\r\n### WHERE\r\n###   @1=13\r\n###   @2='\u6625\u7720'\r\n<\/pre>\n
\u7136\u800c\u9047\u5230\u4e86\u5b57\u7b26\u96c6\u95ee\u9898\uff0c\u539f\u56e0\u5728MySQL binlog\u5b57\u7b26\u7f16\u7801\u65b9\u5f0f<\/a>\u5206\u6790\u8fc7\u4e86\uff0cbinlog\u4e2d@i=’xxx’\u4e2d\u7684\u2018xxx\u2019\u7684\u5b57\u7b26\u96c6\u5b9e\u9645\u4e0a\u662f\u8868\u4e2d\u5217\u7684\u5b57\u7b26\u96c6\uff08\u5b58\u50a8\u5b57\u7b26\u96c6\uff09\uff0c\u5982\u679c\u4e00\u4e2a\u8868\u4e2d\u4e0d\u540c\u5217\u91c7\u7528\u7684\u5b57\u7b26\u96c6\u5404\u5f02\uff0c\u9006\u5411\u6267\u884c\u2018\u53cd\u5411binlog\u2019\u5c31\u53ef\u80fd\u4f1a\u51fa\u73b0\u95ee\u9898\uff08\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\u90fd\u662f\u91c7\u7528UTF8\uff09\uff0c\u539f\u56e0\u662fSQL\u6267\u884c\u8fc7\u7a0b\u4e2d\u6d89\u53ca\u5230\u7684\u5b57\u7b26\u96c6\u8f6c\u6362\uff1a
\ncharacter_set_client –> character_connection_client –> column character set
\n\u7136\u800c\u6267\u884cSQL\u8fc7\u7a0b\u4e2d\u6ca1\u6709\u529e\u6cd5\u4e3a\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a\u5b57\u7b26\u96c6\uff0cset names yyy\u6307\u5b9a\u7684\u8bdd\uff0c\u6240\u6709char\/varchar\u5b57\u6bb5\u88ab\u89c6\u4e3a\u540c\u4e00\u79cd\u5b57\u7b26\u96c6<\/p>\n
b) \u89e3\u51b3\u65b9\u6848\uff1a<\/h4>\n
\u4fee\u6539mysqlbinlog\u5ba2\u6237\u7aef\u7a0b\u5e8f\uff0c\u5bf9\u4e8echar\/varchar\u7c7b\u578b\uff0c\u8f93\u51fa\u517616\u8fdb\u5236\uff0c\u8fd9\u6837\u5728\u5199\u5165\u65f6\u5c31\u907f\u514d\u4e86\u5b57\u7b26\u96c6\u8f6c\u6362\uff0c\u6548\u679c\uff1a<\/p>\n
\r\nmysqldump -v --hexstring \/path\/to\/mysql-bin.000001|grep ^###\r\n<\/pre>\n
\r\n### INSERT INTO test.t1\r\n### SET\r\n###   @1=13\r\n###   @2=x'e698a5e79ca0e4b88de8a789e69993'\r\n### UPDATE test.t1\r\n### WHERE\r\n###   @1=13\r\n###   @2=x'e698a5e79ca0e4b88de8a789e69993'\r\n### SET\r\n###   @1=13\r\n###   @2=x'e698a5e79ca0'\r\n### DELETE FROM test.t1\r\n### WHERE\r\n###   @1=13\r\n###   @2=x'e698a5e79ca0'\r\n<\/pre>\n
c) patch\u4e0b\u8f7d<\/h4>\n
mysqlbinlog_hexstring.patch<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b9e\u9a8c\uff1a a) \u7cfb\u7edf\u73af\u5883\uff1a $echo $LANG en_US.UTF-8 CREATE TABLE `t1`  … \u7ee7\u7eed\u9605\u8bfbMySQL 16\u8fdb\u5236\u5b57\u7b26\u4e32\u4e0e\u7f16\u7801<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[1],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p3tPZp-4u","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/278"}],"collection":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=278"}],"version-history":[{"count":15,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/278\/revisions"}],"predecessor-version":[{"id":284,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/278\/revisions\/284"}],"wp:attachment":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=278"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}