{"id":205063,"date":"2025-05-29T11:42:17","date_gmt":"2025-05-29T03:42:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205063\/"},"modified":"2025-05-29T11:42:17","modified_gmt":"2025-05-29T03:42:17","slug":"%e4%bd%bf%e7%94%a8psycopg2%e5%a4%84%e7%90%86%e5%a4%a7%e6%95%b0%e6%8d%ae%e9%9b%86%e6%97%b6%e5%a6%82%e4%bd%95%e9%81%bf%e5%85%8d%e7%a8%8b%e5%ba%8f%e5%8d%a1%e6%ad%bb%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205063\/","title":{"rendered":"\u4f7f\u7528Psycopg2\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u5982\u4f55\u907f\u514d\u7a0b\u5e8f\u5361\u6b7b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u4f7f\u7528Psycopg2\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u5982\u4f55\u907f\u514d\u7a0b\u5e8f\u5361\u6b7b\uff1f<\/h1>\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241122\/173226730667404d2aaa8ed.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4f7f\u7528 psycopg2 \u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u7684\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<p>\u5728\u4f7f\u7528 psycopg2 \u5e93\u4ece postgresql \u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u5927\u6570\u636e\u96c6\u65f6\uff0c\u9047\u5230 execute(sql) \u65b9\u6cd5\u5361\u6b7b\u7684\u60c5\u51b5\u5e76\u4e0d\u5c11\u89c1\u3002\u8fd9\u662f\u56e0\u4e3a psycopg2 \u9ed8\u8ba4\u4f7f\u7528\u5ba2\u6237\u7aef\u6e38\u6807\uff0c\u5b83\u4f1a\u5c06\u6574\u4e2a\u7ed3\u679c\u96c6\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u5bfc\u81f4\u5185\u5b58\u8017\u5c3d\u548c\u5361\u6b7b\u3002<\/p>\n<p>\u4e0e\u5ba2\u6237\u7aef\u6e38\u6807\u4e0d\u540c\uff0c\u670d\u52a1\u7aef\u6e38\u6807\u4f1a\u5728 postgresql \u670d\u52a1\u5668\u4e0a\u4fdd\u7559\u7ed3\u679c\u96c6\uff0c\u5e76\u4ec5\u53d6\u56de\u5ba2\u6237\u7aef\u6bcf\u6b21\u8bf7\u6c42\u7684\u6570\u636e\u5757\u3002\u8fd9\u6709\u52a9\u4e8e\u907f\u514d\u5185\u5b58\u8fc7\u8f7d\u95ee\u9898\uff0c\u5c24\u5176\u662f\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u3002<\/p>\n<p>\u4e3a\u4e86\u4f7f\u7528\u670d\u52a1\u7aef\u6e38\u6807\uff0c\u9700\u8981\u5728\u521b\u5efa\u6e38\u6807\u65f6\u5c06\u5176\u540d\u79f0\u6307\u5b9a\u4e3a &#8216;server_cursor&#8217;\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>with conn.cursor(name='server_cursor') as cursor:\n    cursor.itersize = 10000  # \u8bbe\u7f6e\u6279\u5904\u7406\u5927\u5c0f\n    cursor.execute(sql)\n    for record in cursor:\n        # \u5904\u7406\u8bb0\u5f55<\/pre>\n<p>\u901a\u8fc7\u8bbe\u7f6e itersize \u53c2\u6570\uff0c\u53ef\u4ee5\u63a7\u5236\u6bcf\u6b21\u4ece\u670d\u52a1\u7aef\u6e38\u6807\u4e2d\u53d6\u56de\u7684\u6570\u636e\u5757\u5927\u5c0f\u3002<\/p>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7248\u672c\u7684 psycopg2 \u90fd\u652f\u6301\u670d\u52a1\u7aef\u6e38\u6807\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd\u4f7f\u7528\u652f\u6301\u8be5\u529f\u80fd\u7684\u7248\u672c\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u4f7f\u7528Psycopg2\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u5982\u4f55\u907f\u514d\u7a0b\u5e8f\u5361\u6b7b\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Psycopg2\u5904\u7406\u5927\u6570\u636e\u96c6&#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-205063","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205063","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=205063"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205063\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}