{"description":"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u306fMySQL Casual Advent Calendar 2015\u306e8\u65e5\u76ee\u3067\u3059\u3002 MySQL 5.7.6\u304b\u3089optimizer_switch\u306bderived_merge\u304c\u8ffd\u52a0\u3055\u308c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u57fa\u672c\u7684\u306b\u3053\u308c\u306f\u307b\u3063\u3068\u3044\u305f\u3089\u3060\u3044\u305f\u3044\u30b5\u30d6\u30af\u30a8\u30ea\u304c\u901f\u304f\u306a\u308b\u3084\u3064\u306a\u306e\u3067\u6c17\u306b\u3057\u306a\u304f\u3066\u3082\u3044\u3044\u3093\u3067\u3059\u304c\u3001\u3061\u3087\u3063\u3068\u975e\u4e92\u63db\u304c\u3042\u308b\u306e\u3067\u3055\u304f\u3063\u3068\u8aac\u660e\u3057\u307e\u3059\u3002 root@localhost [mysqlcasual] > CREATE TABLE t1 (a int); Query OK, 0 rows affected (0.03 sec) root@localhost [mysqlcasual\u2026","author_name":"kamipo","blog_url":"https://blog.kamipo.net/","url":"https://blog.kamipo.net/entry/2015/12/08/075800","version":"1.0","blog_title":"\u304b\u307f\u307d\u308f\u30fc\u308b","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kamipo.net%2Fentry%2F2015%2F12%2F08%2F075800\" title=\"MySQL 5.7\u306eoptimizer_switch\u3001derived_merge\u3068\u306f\u4f55\u305e\u3084 - \u304b\u307f\u307d\u308f\u30fc\u308b\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":[],"image_url":null,"published":"2015-12-08 07:58:00","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/kamipo/","type":"rich","width":"100%","height":"190","title":"MySQL 5.7\u306eoptimizer_switch\u3001derived_merge\u3068\u306f\u4f55\u305e\u3084"}