{"description":"MySQL (8.0.22) \u8abf\u3079\u305f\u9650\u308a\u306a\u3057 Oracle (19c) https://docs.oracle.com/cd/F19136_01/tgsql/query-optimizer-concepts.html#GUID-5A1EB094-1A9E-4B69-9BE5-39BDA2B3253C \u9069\u5fdc\u554f\u5408\u305b\u8a08\u753b(Adaptive Plans) \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9 show parameter OPTIMIZER_ADAPTIVE_PLANS; \u9069\u5fdc\u8a08\u753b\u306f\u6b21\u306e\u6700\u9069\u5316\u3092\u5236\u5fa1\u3057\u307e\u3059 \u30fb\u30cd\u30b9\u30c6\u30c3\u30c9\u30fb\u30eb\u30fc\u30d7\u304a\u3088\u3073\u30cf\u30c3\u30b7\u30e5\u7d50\u5408\u9078\u629e\u30fb\u30b9\u30bf\u30fc\u578b\u5909\u63db\u30d3\u30c3\u30c8\u30de\u30c3\u30d7\u30fb\u30d7\u30eb\u30fc\u30cb\u30f3\u30b0\u30fb\u9069\u5fdc\u30d1\u30e9\u30ec\u30eb\u914d\u5206\u65b9\u6cd5 -- \u30c6\u30b9\u2026","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/HTN20190109/","author_name":"HTN20190109","version":"1.0","categories":["DB"],"type":"rich","image_url":null,"width":"100%","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2021%2F04%2F17%2F191714\" title=\"adaptive plan - HTN20190109\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://htn20190109.hatenablog.com/","title":"adaptive plan","url":"https://htn20190109.hatenablog.com/entry/2021/04/17/191714","blog_title":"HTN20190109\u306e\u65e5\u8a18","published":"2021-04-17 19:17:14","provider_name":"Hatena Blog"}