{"categories":["MySQL"],"author_url":"https://blog.hatena.ne.jp/mita2db/","blog_url":"https://mita2db.hateblo.jp/","image_url":null,"width":"100%","author_name":"mita2db","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmita2db.hateblo.jp%2Fentry%2F2020%2F11%2F22%2F170027\" title=\"MySQL \u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u306f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3055\u308c\u308b\u304b - mita2 database life\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","provider_url":"https://hatena.blog","type":"rich","height":"190","published":"2020-11-22 17:00:27","url":"https://mita2db.hateblo.jp/entry/2020/11/22/170027","provider_name":"Hatena Blog","blog_title":"mita2 database life","title":"MySQL \u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u306f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3055\u308c\u308b\u304b","description":"MySQL 8.0 \u3067\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u7d71\u8a08\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u5f93\u6765\u3001MySQL\u306f\u30c7\u30fc\u30bf\u304c\u5747\u7b49\u306b\u5206\u5e03\u3057\u3066\u3044\u308b\u3068\u4eee\u5b9a\u3057\u3001\u5b9f\u884c\u8a08\u753b\u3092\u7d44\u307f\u7acb\u3066\u3066\u3044\u307e\u3057\u305f\u3002 \u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u3092\u4f7f\u3048\u3070\u6b63\u78ba\u306a\u30c7\u30fc\u30bf\u306e\u5206\u5e03\u306b\u57fa\u3065\u3044\u3066\u3001\u3088\u308a\u6700\u9069\u306a\u5b9f\u884c\u8a08\u753b\u304c\u9078\u629e\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 yakst.com \u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u306f ANALIZE TABLE \u301c UPDATE HISTOGRAM \u3067\u8ffd\u52a0\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001information_schema.column_statistics \u3092\u53c2\u7167\u3059\u308b\u3068\u3001\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002 mysql> ANALYZE TABLE t UPDATE HISTOGRAM ON val; +\u2026"}