{"id":21544,"date":"2024-01-02T11:14:24","date_gmt":"2024-01-02T11:14:24","guid":{"rendered":"https:\/\/server.hk\/blog\/21544\/"},"modified":"2024-11-14T10:30:59","modified_gmt":"2024-11-14T02:30:59","slug":"mongodb-glossary-2d-index","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21544\/","title":{"rendered":"MongoDB\u8a5e\u5f59\u8868 &#8211; 2d \u7d22\u5f15"},"content":{"rendered":"<h1 id=\"mongodb-glossary-2d-index-UFaTNCbPdq\">MongoDB\u8a5e\u5f59\u8868 &#8211; 2d \u7d22\u5f15<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7684\u9818\u57df\uff0cMongoDB\u56e0\u5176\u9748\u6d3b\u6027\u3001\u53ef\u64f4\u5c55\u6027\u53ca\u6027\u80fd\u800c\u53d7\u5230\u4e86\u5ee3\u6cdb\u7684\u95dc\u6ce8\u3002\u4f7fMongoDB\u6210\u70ba\u773e\u591a\u958b\u767c\u8005\u9996\u9078\u7684\u91cd\u8981\u7279\u9ede\u4e4b\u4e00\u662f\u5176\u5c0d\u5404\u7a2e\u985e\u578b\u7d22\u5f15\u7684\u652f\u6301\u3002\u672c\u6587\u5c07\u63a2\u8a0eMongoDB\u4e2d2d\u7d22\u5f15\u7684\u6982\u5ff5\uff0c\u4e26\u7406\u89e3\u5176\u5728\u512a\u5316\u67e5\u8a62\u6027\u80fd\u65b9\u9762\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"understanding-indexes-in-mongodb-UFaTNCbPdq\">\u4e86\u89e3MongoDB\u4e2d\u7684\u7d22\u5f15<\/h2>\n<p>\u7d22\u5f15\u5728\u63d0\u5347\u6578\u64da\u5eab\u67e5\u8a62\u6027\u80fd\u65b9\u9762\u8d77\u8457\u81f3\u95dc\u91cd\u8981\u7684\u4f5c\u7528\u3002\u5b83\u5011\u662f\u6578\u64da\u7d50\u69cb\uff0c\u4f7f\u5f97\u6578\u64da\u5eab\u80fd\u5920\u6839\u64da\u7279\u5b9a\u5b57\u6bb5\u6709\u6548\u5730\u6aa2\u7d22\u548c\u7be9\u9078\u6578\u64da\u3002\u901a\u904e\u5728\u7d93\u5e38\u67e5\u8a62\u7684\u5b57\u6bb5\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u7372\u53d6\u6240\u9700\u6578\u64da\u6240\u9700\u7684\u6642\u9593\u3002<\/p>\n<p>\u5728MongoDB\u4e2d\uff0c\u7d22\u5f15\u662f\u4f7f\u7528<code>createIndex()<\/code>\u65b9\u6cd5\u5275\u5efa\u7684\u3002\u6b64\u65b9\u6cd5\u63a5\u53d7\u96c6\u5408\u7684\u540d\u7a31\u548c\u9700\u8981\u5275\u5efa\u7d22\u5f15\u7684\u5b57\u6bb5\u3002MongoDB\u652f\u6301\u5404\u7a2e\u985e\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec\u55ae\u5b57\u6bb5\u7d22\u5f15\u3001\u8907\u5408\u7d22\u5f15\u3001\u591a\u9375\u7d22\u5f15\u548c\u5730\u7406\u7a7a\u9593\u7d22\u5f15\u3002<\/p>\n<h2 id=\"introducing-2d-index-UFaTNCbPdq\">\u4ecb\u7d392d\u7d22\u5f15<\/h2>\n<p>2d\u7d22\u5f15\uff0c\u4e5f\u7a31\u4f5c\u4e8c\u7dad\u7d22\u5f15\uff0c\u662f\u4e00\u7a2e\u5c08\u70ba\u5b58\u5132\u548c\u67e5\u8a62\u4e8c\u7dad\u6578\u64da\u800c\u8a2d\u8a08\u7684\u5730\u7406\u7a7a\u9593\u7d22\u5f15\u3002\u5b83\u4e3b\u8981\u7528\u65bc\u8868\u793a\u4e8c\u7dad\u5e73\u9762\u4e0a\u7684\u9ede\uff0c\u4f8b\u5982\u5730\u5716\u4e0a\u7684\u5750\u6a19\u3002<\/p>\n<p>\u5728\u5275\u5efa2d\u7d22\u5f15\u6642\uff0cMongoDB\u671f\u671b\u7d22\u5f15\u5b57\u6bb5\u5305\u542b\u4e00\u500b\u6578\u7d44\u6216\u5b50\u6587\u6a94\uff0c\u8a72\u6578\u7d44\u5305\u542b\u5169\u500b\u6578\u503c\uff0c\u4ee3\u8868x\u548cy\u5750\u6a19\u3002\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u6587\u6a94\uff1a<\/p>\n<pre><code>{\r\n  \"_id\": 1,\r\n  \"location\": [40.7128, -74.0060]\r\n}\r\n<\/code><\/pre>\n<p>\u8981\u5728&#8221;location&#8221;\u5b57\u6bb5\u4e0a\u5275\u5efa2d\u7d22\u5f15\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>db.collection.createIndex({ \"location\": \"2d\" })\r\n<\/code><\/pre>\n<p>\u4e00\u65e6\u7d22\u5f15\u5275\u5efa\u5b8c\u6210\uff0c\u6211\u5011\u4fbf\u53ef\u4ee5\u57f7\u884c\u5404\u7a2e\u5730\u7406\u7a7a\u9593\u67e5\u8a62\uff0c\u4ee5\u6839\u64da\u8207\u7279\u5b9a\u9ede\u7684\u63a5\u8fd1\u7a0b\u5ea6\u6216\u67d0\u500b\u5340\u57df\u5167\u7684\u4f4d\u7f6e\u627e\u5230\u6587\u6a94\u3002<\/p>\n<h2 id=\"performing-geospatial-queries-with-2d-index-UFaTNCbPdq\">\u4f7f\u75282d\u7d22\u5f15\u57f7\u884c\u5730\u7406\u7a7a\u9593\u67e5\u8a62<\/h2>\n<p>\u6709\u4e862d\u7d22\u5f15\uff0cMongoDB\u63d0\u4f9b\u4e86\u591a\u500b\u67e5\u8a62\u64cd\u4f5c\u7b26\u4f86\u57f7\u884c\u5730\u7406\u7a7a\u9593\u67e5\u8a62\uff1a<\/p>\n<ul>\n<li><code>$near<\/code>\uff1a\u8fd4\u56de\u63a5\u8fd1\u6307\u5b9a\u9ede\u7684\u6587\u6a94\u3002<\/li>\n<li><code>$geoWithin<\/code>\uff1a\u8fd4\u56de\u5728\u6307\u5b9a\u5340\u57df\u5167\u7684\u6587\u6a94\u3002<\/li>\n<li><code>$geoIntersects<\/code>\uff1a\u8fd4\u56de\u8207\u6307\u5b9a\u5e7e\u4f55\u5f62\u72c0\u76f8\u4ea4\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u8981\u627e\u5230\u8207\u7d66\u5b9a\u9ede\u5728\u7279\u5b9a\u8ddd\u96e2\u5167\u7684\u6240\u6709\u6587\u6a94\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528<code>$near<\/code>\u64cd\u4f5c\u7b26\uff1a<\/p>\n<pre><code>db.collection.find({\r\n  \"location\": {\r\n    \"$near\": {\r\n      \"$geometry\": {\r\n        \"type\": \"Point\",\r\n        \"coordinates\": [40.7128, -74.0060]\r\n      },\r\n      \"$maxDistance\": 1000\r\n    }\r\n  }\r\n})\r\n<\/code><\/pre>\n<p>\u6b64\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u8ddd\u96e2\u6307\u5b9a\u9ede1000\u7c73\u5167\u7684\u6587\u6a94\u3002<\/p>\n<h2 id=\"conclusion-UFaTNCbPdq\">\u7d50\u8ad6<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c2d\u7d22\u5f15\u662f\u7528\u65bc\u5b58\u5132\u548c\u67e5\u8a62\u4e8c\u7dad\u6578\u64da\uff08\u4f8b\u5982\u5730\u5716\u4e0a\u7684\u5750\u6a19\uff09\u7684\u5f37\u5927\u5de5\u5177\u3002\u901a\u904e\u5229\u75282d\u7d22\u5f15\u7684\u80fd\u529b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u512a\u5316\u5730\u7406\u7a7a\u9593\u67e5\u8a62\uff0c\u4e26\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<p>\u8981\u4e86\u89e3\u66f4\u591a\u6709\u95dcMongoDB\u53ca\u5176\u7279\u6027\u7684\u8cc7\u8a0a\uff0c\u53ef\u4ee5\u8003\u616e\u63a2\u7d22<a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u9818\u5148\u7684VPS\u4e3b\u6a5f\u63d0\u4f9b\u5546\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u53ef\u64f4\u5c55\u7684MongoDB\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB\u8a5e\u5f59\u8868 &#038;#821&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21544","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21544"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21544\/revisions"}],"predecessor-version":[{"id":23913,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21544\/revisions\/23913"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}