{"id":4546,"date":"2014-12-01T12:51:46","date_gmt":"2014-12-01T03:51:46","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=4546"},"modified":"2018-11-14T16:33:50","modified_gmt":"2018-11-14T07:33:50","slug":"checkpoint_of_mysql_for_pg_user","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2014\/12\/01\/checkpoint_of_mysql_for_pg_user\/","title":{"rendered":"PostgreSQL\u7d4c\u9a13\u8005\u304cMySQL\u3067\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3057\u305f\u6642\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3002\u4e09\u82eb\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f<a href=\"http:\/\/www.techscore.com\/blog\/2014\/11\/27\/techscore-advent-calendar-2014\/\">TECHSCORE Advent Calendar 2014<\/a>\u30011\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>\u672c\u65e5\u306fPostgreSQL\u7d4c\u9a13\u306e\u9577\u3044\u79c1\u304cMySQL\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u65b0\u898f\u306b\u69cb\u7bc9\u3001\u904b\u7528\u3059\u308b\u3068\u304d\u306b\u30cf\u30de\u3063\u305f\u6ce3\u3044\u305f\u30ea\u30b9\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3068\u3057\u3066\u5171\u6709\u3057\u307e\u3059\u3002<\/p>\n<p>PostgreSQL\u3057\u304b\u307e\u3068\u3082\u306b\u4f7f\u3063\u305f\u3053\u3068\u304c\u306a\u3044\u4eba\u304c\u6e96\u5099\u4e0d\u8db3\u3067MySQL\u306b\u7a81\u6483\u3059\u308b\u3068\u4f55\u304c\u8d77\u3053\u308b\u304b\u77e5\u3063\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>@tmtms \u3055\u3093\u306e<a href=\"http:\/\/tmtms.hatenablog.com\/entry\/2014\/10\/25\/mysql-postgresql\" target=\"_blank\">MySQL\u30e6\u30fc\u30b6\u30fc\u304cPostgreSQL\u3092\u89e6\u3063\u3066\u307f\u305f\u30e1\u30e2<\/a>\u3068\u91cd\u306a\u308b\u90e8\u5206\u3082\u591a\u3044\u3067\u3059\u304c\u3001\u9006\u304b\u3089\u898b\u305f\u8996\u70b9\u3068\u3044\u3046\u3053\u3068\u3067\u3054\u5bb9\u8d66\u3092\u3002<\/p>\n<h1>\u5fc5\u305a\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981<\/h1>\n<ol>\n<li>SQL\u30e2\u30fc\u30c9\u3092POSTGRESQL\u306b\u3059\u308b\u306e\u304c\u826f\u3055\u305d\u3046\n<ul>\n<li>INSERT\u6642\u306b\u30a8\u30e9\u30fc\u3092\u30b9\u30eb\u30fc\u3059\u308b\u3088\u3046\u306a\u6319\u52d5\u3092\u907f\u3051\u308b<\/li>\n<li>\u578b\u306e\u4e0a\u9650\u5024\u3092\u8d85\u3048\u305f\u6570\u5024\u3092INSERT\u3057\u305f\u6642\u306b\u3001\u30a8\u30e9\u30fc\u3092\u51fa\u3055\u305a\u306b\u6700\u5927\u5024\u3092\u30bb\u30c3\u30c8\u3059\u308b\u3088\u3046\u306a\u6319\u52d5\u3092\u907f\u3051\u308b<br \/>\n\uff08\u3053\u306e\u6319\u52d5\u3092\u77e5\u3063\u305f\u5f53\u6642\u306f\u305d\u308c\u306a\u308a\u306b\u885d\u6483\u3067\u3057\u305f\u2026\uff09<\/li>\n<li>GROUP BY\u304c\u66d6\u6627\u306a\u6307\u5b9a\u3092\u8a31\u3055\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u6587\u5b57\u30b3\u30fc\u30c9\u6307\u5b9a\u306futf8\u3067\u306f\u306a\u304futf8mb4\u306b\u3059\u308b\n<ul>\n<li>utf8\u306f3\u30d0\u30a4\u30c8\u307e\u3067\u306eutf8\u6587\u5b57\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3002utf8mb4\u304c4\u30d0\u30a4\u30c8\u6587\u5b57\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3002<\/li>\n<li>MySQL\u3067\u306f\u6587\u5b57\u30b3\u30fc\u30c9\u7bc4\u56f2\u5916\u306e\u6587\u5b57\u304c\u51fa\u3066\u304d\u305f\u5834\u5408\u306f\u4ee5\u964d\u306e\u6587\u5b57\u304c\u3059\u3079\u3066\u524a\u9664\u3055\u308c\u3066INSERT\u3055\u308c\u308b\u3002\uff08SQL\u30e2\u30fc\u30c9\u306b\u3088\u3063\u3066\u9055\u3046\u304b\u3082\uff09<\/li>\n<li>\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u3069\u3093\u306a\u6587\u5b57\u5217\u304c\u5165\u529b\u3055\u308c\u308b\u304b\u308f\u304b\u3089\u306a\u3044\u30b7\u30b9\u30c6\u30e0\u306e\u5834\u5408\u306f\u5fc5\u9808\u3002iOS\u306a\u3069\u306e\u7d75\u6587\u5b57\u304c\u30a2\u30a6\u30c8\u306b\u306a\u308b\u3082\u3088\u3046\uff1f<\/li>\n<\/ul>\n<\/li>\n<li>\u6587\u5b57\u5217\u306f\u30c7\u30d5\u30a9\u30eb\u30c8case sensitive\u3067\u6271\u3046\u3088\u3046\u8a2d\u5b9a\u3057\u3066\u304a\u304f\n<ul>\n<li>MySQL\u306fcase insensitive\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3002<\/li>\n<li>unique index \u3082\u7279\u306b\u6307\u5b9a\u304c\u306a\u3051\u308c\u3070\u3053\u308c\u306b\u5f93\u3046<\/li>\n<\/ul>\n<\/li>\n<li>\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092\u5fc5\u305a\u3064\u3051\u308b\n<ul>\n<li>innodb\u306e\u5834\u5408\u3001auto_increment\u304c\u518d\u8d77\u52d5\u6642\u306b\u5dfb\u304d\u623b\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092\u3064\u3051\u3066\u304a\u304b\u306a\u3044\u3068\u3001\u540c\u3058ID\u304c\u518d\u5ea6\u767a\u884c\u3055\u308c\u89aa\u304c\u524a\u9664\u3055\u308c\u305f\u5b50\u30ec\u30b3\u30fc\u30c9\u304c\u5225\u306e\u89aa\u306b\u7d10\u4ed8\u304f\u5834\u5408\u304c\u3042\u308b\u3002<\/li>\n<li>\u540c\u3058ID\u304c\u4e8c\u5ea6\u3068\u632f\u3089\u308c\u3066\u306f\u3044\u3051\u306a\u3044\u5834\u5408\u306f\u30b7\u30fc\u30b1\u30f3\u30b9\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u308b\u5fc5\u8981\u304c\u3042\u308b<br \/>\nID\u9805\u76ee\u304cExport\u3084URL\u306a\u3069\u3067\u5916\u90e8\u306b\u9732\u51fa\u3059\u308b\u3088\u3046\u306a\u8a2d\u8a08\u306b\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u7279\u306b\u6ce8\u610f\u3002<\/li>\n<li>rails\u3067\u69cb\u7bc9\u3057\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308c\u3070<a href=\"https:\/\/github.com\/matthuhiggins\/foreigner\">foreigner<\/a>\u3068\u3044\u3046gem\u3092\u4f7f\u3046\u3068\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092\u6301\u3064\u30de\u30a4\u30b0\u30ec\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u304c\u66f8\u304d\u3084\u3059\u3044\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h1>\u610f\u8b58\u3057\u3066\u304a\u3051\u3070\u3044\u3044<\/h1>\n<ol>\n<li>JOIN\u304c\u9045\u3044\n<ul>\n<li>PostgreSQL\u306e\u3088\u3046\u306bJOIN\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u591a\u5f69\u3067\u306f\u306a\u3044\u306e\u3067\u96c6\u8a08\u6642\u306b\u8907\u96d1\u306aJOIN\u3092\u907f\u3051\u305f\u308a\u4e00\u6642\u8868\u3092\u4f7f\u3046\u306a\u3069\u306e\u7f6e\u304d\u63db\u3048\u304c\u5fc5\u8981\u306a\u5834\u5408\u304c\u3042\u308b<\/li>\n<li>MySQL\u3067\u6570\u6642\u9593\u3001PostgreSQL\u3067\u6570\u5206\u307f\u305f\u3044\u306a\u3053\u3068\u3082\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u5206\u96e2\u30ec\u30d9\u30eb\u304cREPEATABLE READ\n<ul>\n<li>PostgreSQL\u3088\u308a\u3082\u9ad8\u3044\u5206\u96e2\u30ec\u30d9\u30eb\u3060\u304c\u3001\u601d\u308f\u306c\u3068\u3053\u308d\u3067SELECT\u6642\u306b\u30ed\u30c3\u30af\u304c\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u308b\u3002<br \/>\nREAD COMMITED\u306b\u3057\u3066\u304a\u3051\u3070PostgreSQL\u3068\u540c\u3058\u6c17\u5206\u3067\u958b\u767a\u3067\u304d\u308b\u3002<br \/>\n\u203b\u305f\u3060\u3057READ COMMITED\u306b\u3057\u3066\u304a\u3044\u305f\u3089\u30ed\u30c3\u30af\u3057\u306a\u3044\u304b\u3069\u3046\u304b\u306f\u691c\u8a3c\u3057\u3066\u3044\u306a\u3044\u3002<\/li>\n<li>next key lock \u306a\u3069\u3082\u6ce8\u610f\u3057\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u3002\u8a73\u7d30\u306f\u8907\u96d1\u904e\u304e\u3066\u8aac\u660e\u3059\u308b\u6c17\u304c\u8d77\u304d\u306a\u3044\u306e\u3067\u5404\u3005\u3067\u8abf\u3079\u3066\u6b32\u3057\u3044\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u9577\u5927\u306a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u907f\u3051\u308b\n<ul>\n<li>\u539f\u56e0\u4e0d\u660e\u3060\u304c\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u6b63\u5e38\u306b\u884c\u308f\u308c\u306a\u3044\u30b1\u30fc\u30b9\u304c\u3042\u3063\u305f\u3002<br \/>\nRDS\u3067\u3082\u8d77\u304d\u306a\u3044\u3068\u3044\u3046\u4fdd\u8a3c\u306f\u306a\u3044\u306e\u3067\u907f\u3051\u308b\u306e\u304c\u7121\u96e3\uff1f<\/li>\n<li>\u9577\u5927\u306a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3068\u306f\u3060\u3044\u305f\u3044\uff11\u6642\u9593\u7a0b\u5ea6\uff08\u3067\u3001\u554f\u984c\u304c\u767a\u751f\u3057\u305f\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u5927\u304d\u306a\u30c7\u30fc\u30bf\u3092DB\u306b\u683c\u7d0d\u3059\u308b\u5834\u5408\n<ul>\n<li>max_allowed_packet\u3092\u5927\u304d\u304f\u3057\u3066\u304a\u304b\u306a\u3044\u3068INSERT\u3067\u304d\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u6c17\u3092\u3064\u3051\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>Null\u5024\u306e\u30bd\u30fc\u30c8\u9806\u304cPostgreSQL\u3068MySQL\u3067\u7570\u306a\u308b<\/li>\n<\/ol>\n<h1>\u77e5\u3063\u3068\u3051\u3070\u3044\u3044<\/h1>\n<ol>\n<li>\u30ab\u30e9\u30e0\u6570\u306e\u4e0a\u9650\u304cPostgreSQL\u3068\u306f\u9055\u3046\uff08\u4ee5\u4e0binnodb\u306e\u5834\u5408\uff09\n<ul>\n<li>varchar\u3092\u591a\u7528\u3059\u308b\u3068\u3001\u65e9\u3081\u306b\u9650\u754c\u304c\u6765\u308b\u3002<\/li>\n<li>innodb_file_format=Barracuda \u3067\u9650\u754c\u3092\u7de9\u548c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/li>\n<li>\u30ab\u30e9\u30e0\u3092\u52d5\u7684\u306b\u5897\u6e1b\u3055\u305b\u308b\u3088\u3046\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u306a\u3051\u308c\u3070\u307e\u305a\u554f\u984c\u306b\u306f\u306a\u3089\u306a\u3044<\/li>\n<li>\u203bPostgreSQL\u306f\u305d\u308c\u306f\u305d\u308c\u3067\u30ab\u30e9\u30e0\u8ffd\u52a0\u306e\u4e0a\u9650\u304c1600\u7a0b\u5ea6\u3002\u3057\u304b\u3082DROP COLUMN\u3057\u3066\u3082<strong>\u56de\u5fa9\u3057\u306a\u3044<\/strong>\u3002\u306a\u3069\u306e\u7f60\u304c\u3042\u308b\u3002<br \/>\n\u203bCREATE\/DROP\u3092\u7e70\u308a\u8fd4\u3057\u3001\u3053\u308c\u4ee5\u4e0a\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u30c6\u30fc\u30d6\u30eb\u3092\u3069\u3046\u3057\u3066\u3082\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u518d\u3073\u30ab\u30e9\u30e0\u304c\u8ffd\u52a0\u3067\u304d\u308b\u72b6\u614b\u306b\u623b\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u4e2d\u3067\u65b0\u3057\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u308a\u30c7\u30fc\u30bf\u3092\u79fb\u884c\u3057\u3001\u30ea\u30cd\u30fc\u30e0\u3057\u3066\u3059\u3052\u66ff\u3048\u308b\u3068\u3044\u3046\u8352\u696d\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li>DDL\u304c\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u5185\u3067\u6271\u3048\u306a\u3044\n<ul>\n<li>\u52d5\u7684\u306a\u30ab\u30e9\u30e0\u8ffd\u52a0\u3092\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3067\u4fdd\u8b77\u3057\u305f\u3044\u3088\u3046\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u306a\u3051\u308c\u3070\u307e\u305a\u554f\u984c\u306b\u306f\u306a\u3089\u306a\u3044<br \/>\n\uff08\u304c\u3001\u81ea\u5206\u306f\u554f\u984c\u306b\u306a\u3063\u305f\uff09<\/li>\n<\/ul>\n<\/li>\n<li>\u539f\u56e0\u4e0d\u660e\u306e\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\n<ul>\n<li>\u5927\u91cf\u306e\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u308bDB\u306e\u30ab\u30bf\u30ed\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u983b\u7e41\u306b\u53c2\u7167\u3059\u308b\u3068\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<br \/>\n\uff08\u539f\u56e0\u4e0d\u660e, 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href=\"https:\/\/www.techscore.com\/blog\/2014\/12\/01\/checkpoint_of_mysql_for_pg_user\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[141,63,206],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/4546"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=4546"}],"version-history":[{"count":12,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/4546\/revisions"}],"predecessor-version":[{"id":4894,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/4546\/revisions\/4894"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=4546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=4546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=4546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}