{"provider_name":"Hatena Blog","blog_title":"sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8","version":"1.0","author_name":"sakaik","type":"rich","width":"100%","provider_url":"https://hatena.blog","title":" MySQL GIS\u62e1\u5f35\u95a2\u6570\uff1a STX_IsRing()","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/s/sakaik/20260220/20260220083350.png","url":"https://sakaik.hateblo.jp/entry/20260220/STX_IsRing_func","blog_url":"https://sakaik.hateblo.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsakaik.hateblo.jp%2Fentry%2F20260220%2FSTX_IsRing_func\" title=\" MySQL GIS\u62e1\u5f35\u95a2\u6570\uff1a STX_IsRing() - sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2026-02-20 08:55:43","categories":["mysql","gis","spatial","newfunc"],"description":"MySQL Plugin\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u3001MySQL\u306bSpatial(GIS;\u5730\u7406\u7a7a\u9593\u60c5\u5831)\u30c7\u30fc\u30bf\u3092\u6271\u3046\u95a2\u6570\u3092\u7206\u5897\u3055\u305b\u308b\u8a66\u307f\u3092\u3057\u3066\u3044\u307e\u3059\u3002 \uff08MySQL Spatial Functions Plugin \u3092\u516c\u958b\u3057\u307e\u3057\u305f(\u03b1\u7248) - sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8\uff09\u691c\u8a3c\u3057\u306a\u304c\u3089\u95a2\u6570\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304f\u30a8\u30f3\u30c8\u30ea\u30fc\u30016\u500b\u76ee\u306e\u95a2\u6570\u306f IsRing \u3067\u3059\u3002 ST_IsRing() \u5f15\u6570\u3067\u4e0e\u3048\u3089\u308c\u305f LINESTRING\u304c\u300c\u9589\u3058\u3066\u3044\u308b\u304b\u300d\u3092\u691c\u8a3c\u3057\u3066 True/False( 1/0 ) \u3092\u8fd4\u3059\u95a2\u6570\u3067\u3059\u3002MySQL\u6a19\u6e96\u306b\u306f\u4f3c\u305f\u95a2\u6570\u3068\u3057\u3066 ST_IsClosed() \u3068\u3044\u3046\u306e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u3061\u3089\u306f\u59cb\u70b9\u3068\u7d42\u70b9\u304c\u540c\u3058\u3067\u3042\u2026","author_url":"https://blog.hatena.ne.jp/sakaik/","height":"190"}