{"id":207444,"date":"2025-07-08T13:26:21","date_gmt":"2025-07-08T05:26:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207444\/"},"modified":"2025-07-08T13:26:21","modified_gmt":"2025-07-08T05:26:21","slug":"%e8%bf%90%e8%a1%8c%e6%97%b6%e9%94%99%e8%af%af%ef%bc%9a%e6%97%a0%e6%95%88%e7%9a%84%e5%86%85%e5%ad%98%e5%9c%b0%e5%9d%80%e6%88%96%e9%9b%b6%e6%8c%87%e9%92%88%e5%8f%96%e6%b6%88%e5%bc%95%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207444\/","title":{"rendered":"\u201c\u8fd0\u884c\u65f6\u9519\u8bef\uff1a\u65e0\u6548\u7684\u5185\u5b58\u5730\u5740\u6216\u96f6\u6307\u9488\u53d6\u6d88\u5f15\u7528\u201d\u521b\u5efa\u8868"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u201c\u8fd0\u884c\u65f6\u9519\u8bef\uff1a\u65e0\u6548\u7684\u5185\u5b58\u5730\u5740\u6216\u96f6\u6307\u9488\u53d6\u6d88\u5f15\u7528\u201d\u521b\u5efa\u8868<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-22 17:36:31<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u201c\u8fd0\u884c\u65f6\u9519\u8bef\uff1a\u65e0\u6548\u7684\u5185\u5b58\u5730\u5740\u6216\u96f6\u6307\u9488\u53d6\u6d88\u5f15\u7528\u201d\u521b\u5efa\u8868\u300b<\/span>\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u5c1d\u8bd5\u4f7f\u7528 go 1.11 \u548c postgres\u3002<\/p>\n<pre>package db\n\nimport (\n    \"database\/sql\"\n    _ \"github.com\/lib\/pq\" \/\/database connector\n    g \"app\/globalvariables\"\n)\n\nfunc createtable(tid int) {\ns := \"create table someschema.sometable\" + string(tid) + \"(id serial primary key,...);\"\n    db, _ := sql.open(\"postgres\", \"user=\"+g.db_user+\" dbname=\"+g.db_name+\" sslmode=disable\")\n    defer db.close()\n    q, _ := db.prepare(s)\n    q.exec()\n}<\/pre>\n<p>\u6d4b\u8bd5\u51fd\u6570\u65f6\u6211\u5f97\u5230\uff1a<\/p>\n<pre>panic: runtime error: invalid memory address or nil pointer dereference [recovered]\n    panic: runtime error: invalid memory address or nil pointer dereference\n[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x51d46a]<\/pre>\n<p>\u5b83\u53ef\u80fd\u662f\u4ec0\u4e48\uff1f<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u6211\u9519\u8bef\u5730\u7528\u201cstring\u201d\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002\u6211\u5fc5\u987b\u4f7f\u7528 strconv.Iota\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u201c\u8fd0\u884c\u65f6\u9519\u8bef\uff1a\u65e0\u6548\u7684\u5185\u5b58\u5730\u5740\u6216\u96f6\u6307\u9488\u53d6\u6d88\u5f15\u7528\u201d\u521b\u5efa\u8868\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207444","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207444","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=207444"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207444\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}