{"id":205377,"date":"2025-05-29T16:05:40","date_gmt":"2025-05-29T08:05:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205377\/"},"modified":"2025-05-29T16:05:40","modified_gmt":"2025-05-29T08:05:40","slug":"psycopg2%e6%89%a7%e8%a1%8c%e5%a4%a7%e6%95%b0%e6%8d%ae%e9%87%8fsql%e5%8d%a1%e6%ad%bb%e7%9a%84%e5%8e%9f%e5%9b%a0%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205377\/","title":{"rendered":"Psycopg2\u6267\u884c\u5927\u6570\u636e\u91cfSQL\u5361\u6b7b\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Psycopg2\u6267\u884c\u5927\u6570\u636e\u91cfSQL\u5361\u6b7b\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u89e3\u51b3\uff1f<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300aPsycopg2\u6267\u884c\u5927\u6570\u636e\u91cfSQL\u5361\u6b7b\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u89e3\u51b3\uff1f\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241130\/1732946615674aaab74d84a.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>psycopg2\u6267\u884c\u5927\u6570\u636e\u91cfsql\u5361\u6b7b\u7684\u539f\u56e0\u53ca\u5176\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n<p>\u5728\u4f7f\u7528psycopg2\u5904\u7406\u5927\u6570\u636e\u91cfsql\u65f6\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u6267\u884cexecute(sql)\u540e\u7a0b\u5e8f\u5361\u6b7b\u7684\u73b0\u8c61\uff0c\u540c\u65f6\u5185\u5b58\u5360\u7528\u6301\u7eed\u4e0a\u5347\u3002\u8fd9\u662f\u7531\u4e8epsycopg2\u9ed8\u8ba4\u4f7f\u7528\u5ba2\u6237\u7aef\u6e38\u6807\uff0c\u800c\u5ba2\u6237\u7aef\u6e38\u6807\u4f1a\u5c06\u5168\u90e8\u67e5\u8be2\u7ed3\u679c\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n<p>\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528\u670d\u52a1\u7aef\u6e38\u6807\uff0c\u5176\u53ea\u4f1a\u5728\u9700\u8981\u65f6\u624d\u4ece\u6570\u636e\u5e93\u83b7\u53d6\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u3002<\/p>\n<p><strong>\u670d\u52a1\u7aef\u6e38\u6807\u7684\u7528\u6cd5<\/strong><\/p>\n<p>psycopg2\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5f00\u542f\u670d\u52a1\u7aef\u6e38\u6807\uff1a<\/p>\n<pre>with conn.cursor(name='server_cursor') as cursor:\n    cursor.itersize = 10000  # \u8bbe\u7f6e\u4f60\u8981\u7684\u6279\u91cf\u5927\u5c0f\n    cursor.execute(sql)\n    for record in cursor:\n        # \u5904\u7406\u8bb0\u5f55<\/pre>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>conn\u662f\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61\u3002<\/li>\n<li>cursor.itersize\u8bbe\u7f6e\u6bcf\u6b21\u4ece\u670d\u52a1\u7aef\u83b7\u53d6\u6570\u636e\u7684\u6279\u91cf\u5927\u5c0f\uff0c\u9ed8\u8ba4\u4e3a0\uff0c\u8868\u793a\u53d6\u6d88\u6279\u91cf\u83b7\u53d6\u3002<\/li>\n<\/ul>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aPsycopg2\u6267\u884c\u5927\u6570\u636e\u91cfSQL\u5361\u6b7b\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Psycopg2\u6267\u884c\u5927\u6570\u636e\u91cfSQ&#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-205377","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205377","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=205377"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205377\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}