{"id":21498,"date":"2024-01-02T10:23:25","date_gmt":"2024-01-02T10:23:25","guid":{"rendered":"https:\/\/server.hk\/blog\/21498\/"},"modified":"2024-11-14T10:33:08","modified_gmt":"2024-11-14T02:33:08","slug":"how-to-fix-postgresql-error-code-p0003-too_many_rows","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21498\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows"},"content":{"rendered":"<h1 id=\"how-to-fix-postgresql-error-code-p0003-too_many_rows-clPecjDIzY\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u4e0d\u540c\u7684\u61c9\u7528\u7a0b\u5f0f\u3002\u7136\u800c\uff0c\u8207\u6240\u6709\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u4e5f\u53ef\u80fd\u9047\u5230\u9700\u8981\u89e3\u6c7a\u7684\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows\u3002\u7576\u67e5\u8a62\u8fd4\u56de\u591a\u65bc\u4e00\u884c\u7d50\u679c\uff0c\u4f46\u61c9\u7528\u7a0b\u5f0f\u9810\u671f\u53ea\u8fd4\u56de\u4e00\u884c\u6642\uff0c\u5c31\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u6210\u56e0\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"causes-of-postgresql-error-code-p0003-too_many_rows-clPecjDIzY\">PostgreSQL \u932f\u8aa4\u4ee3\u78bc P0003 &#8211; too_many_rows \u7684\u6210\u56e0<\/h2>\n<p>\u4ee5\u4e0b\u662f\u5c0e\u81f4 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows \u7684\u5e7e\u500b\u5e38\u898b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u932f\u8aa4\u7684\u67e5\u8a62\u8a9e\u53e5\uff1a<\/strong>\u6700\u5e38\u898b\u7684\u539f\u56e0\u662f\u67e5\u8a62\u8a9e\u53e5\u4e0d\u6b63\u78ba\u3002\u5982\u679c\u60a8\u7684\u67e5\u8a62\u8a9e\u53e5\u7de8\u5beb\u4e0d\u7576\u6216\u7f3a\u5c11\u9069\u7576\u7684\u7be9\u9078\u689d\u4ef6\uff0c\u53ef\u80fd\u6703\u8fd4\u56de\u591a\u884c\u6578\u64da\uff0c\u800c\u975e\u55ae\u884c\u6578\u64da\u3002<\/li>\n<li><strong>\u7f3a\u5c11\u806f\u63a5\uff1a<\/strong>\u53e6\u4e00\u500b\u539f\u56e0\u662f\u67e5\u8a62\u8a9e\u53e5\u4e2d\u7f3a\u5c11\u806f\u63a5 (Join)\u3002\u7576\u60a8\u67e5\u8a62\u591a\u500b\u8868\u6642\uff0c\u5982\u679c\u6c92\u6709\u6307\u5b9a\u5fc5\u8981\u7684\u806f\u63a5\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u8fd4\u56de\u591a\u884c\u7d50\u679c\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\u554f\u984c\uff1a<\/strong>\u6578\u64da\u5b8c\u6574\u6027\u554f\u984c\uff0c\u4f8b\u5982\u91cd\u8907\u8a18\u9304\u6216\u4e0d\u4e00\u81f4\u7684\u6578\u64da\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows\u3002\u78ba\u4fdd\u6578\u64da\u4e7e\u6de8\u4e14\u4e00\u81f4\u975e\u5e38\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h2 id=\"how-to-fix-postgresql-error-code-p0003-too_many_rows-clPecjDIzY\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows<\/h2>\n<p>\u73fe\u5728\u6211\u5011\u4e86\u89e3\u4e86 PostgreSQL \u932f\u8aa4\u4ee3\u78bc P0003 &#8211; too_many_rows \u7684\u6210\u56e0\uff0c\u63a5\u4e0b\u4f86\u8b93\u6211\u5011\u63a2\u8a0e\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-review-and-modify-your-query-clPecjDIzY\">1. \u6aa2\u67e5\u4e26\u4fee\u6539\u60a8\u7684\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u60a8\u7684\u67e5\u8a62\u8a9e\u53e5\uff0c\u78ba\u4fdd\u5b83\u662f\u6b63\u78ba\u7684\u3002\u6aa2\u67e5\u662f\u5426\u7f3a\u5c11\u4efb\u4f55\u7be9\u9078\u689d\u4ef6\u6216\u5176\u4ed6\u53ef\u80fd\u5c0e\u81f4\u8fd4\u56de\u591a\u884c\u6578\u64da\u7684\u554f\u984c\u3002\u78ba\u4fdd\u60a8\u7684\u67e5\u8a62\u8db3\u5920\u5177\u9ad4\uff0c\u53ea\u6aa2\u7d22\u6240\u9700\u7684\u55ae\u884c\u6578\u64da\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662f SELECT \u8a9e\u53e5\uff0c\u53ef\u4ee5\u8003\u616e\u6dfb\u52a0 WHERE \u5b50\u53e5\u4ee5\u7e2e\u5c0f\u7d50\u679c\u7bc4\u570d\u3002\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662f UPDATE \u6216 DELETE \u8a9e\u53e5\uff0c\u8acb\u4ed4\u7d30\u6aa2\u67e5\u689d\u4ef6\uff0c\u4ee5\u78ba\u4fdd\u5b83\u5011\u53ea\u91dd\u5c0d\u9810\u671f\u7684\u6578\u64da\u884c\u3002<\/p>\n<h3 id=\"2-add-joins-to-your-query-clPecjDIzY\">2. \u70ba\u67e5\u8a62\u8a9e\u53e5\u6dfb\u52a0\u806f\u63a5<\/h3>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u67e5\u8a62\u591a\u500b\u8868\uff0c\u8acb\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u5305\u62ec\u5fc5\u8981\u7684\u806f\u63a5\u3002\u806f\u63a5\u6709\u52a9\u65bc\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u4e26\u78ba\u4fdd\u67e5\u8a62\u8fd4\u56de\u671f\u671b\u7684\u55ae\u884c\u6578\u64da\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u8981\u5f9e\u5169\u500b\u8868\uff08\u8868 A \u548c\u8868 B\uff09\u4e2d\u9078\u64c7\u6578\u64da\uff0c\u4e26\u4e14\u5b83\u5011\u7531\u4e00\u500b\u516c\u5171\u6b04\u4f4d\u76f8\u95dc\u806f\uff0c\u8acb\u4f7f\u7528\u9069\u7576\u7684\u806f\u63a5\uff08\u5982 INNER JOIN \u6216 LEFT JOIN\uff09\u4f86\u57fa\u65bc\u9019\u7a2e\u95dc\u4fc2\u5408\u4f75\u8868\u6578\u64da\u3002<\/p>\n<h3 id=\"3-verify-data-integrity-clPecjDIzY\">3. \u9a57\u8b49\u6578\u64da\u5b8c\u6574\u6027<\/h3>\n<p>\u6aa2\u67e5\u60a8\u7684\u6578\u64da\u662f\u5426\u5b58\u5728\u4efb\u4f55\u53ef\u80fd\u5c0e\u81f4 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows \u7684\u5b8c\u6574\u6027\u554f\u984c\u3002\u67e5\u627e\u91cd\u8907\u8a18\u9304\u3001\u4e0d\u4e00\u81f4\u6578\u64da\u6216\u5176\u4ed6\u53ef\u80fd\u5c0e\u81f4\u8fd4\u56de\u591a\u884c\u6578\u64da\u7684\u7570\u5e38\u60c5\u6cc1\u3002<\/p>\n<p>\u78ba\u4fdd\u60a8\u7684\u6578\u64da\u5df2\u6b63\u898f\u5316\uff0c\u4e26\u9075\u5faa\u4fdd\u6301\u6578\u64da\u5b8c\u6574\u6027\u7684\u6700\u4f73\u505a\u6cd5\u3002\u5b9a\u671f\u57f7\u884c\u6578\u64da\u9a57\u8b49\u548c\u6e05\u7406\uff0c\u4ee5\u6d88\u9664\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n<h3 id=\"4-use-limit-or-fetch-first-1-row-only-clPecjDIzY\">4. \u4f7f\u7528 LIMIT \u6216 FETCH FIRST 1 ROW ONLY<\/h3>\n<p>\u5982\u679c\u60a8\u78ba\u5b9a\u67e5\u8a62\u61c9\u8a72\u53ea\u8fd4\u56de\u4e00\u884c\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528 LIMIT \u5b50\u53e5\u6216 FETCH FIRST 1 ROW ONLY \u4f86\u9650\u5236\u7d50\u679c\u96c6\u53ea\u8fd4\u56de\u4e00\u884c\u6578\u64da\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u9632\u6b62 PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows \u7684\u767c\u751f\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5728\u67e5\u8a62\u7684\u672b\u5c3e\u6dfb\u52a0 &#8220;LIMIT 1&#8221; \u4f86\u53ea\u6aa2\u7d22\u7b26\u5408\u689d\u4ef6\u7684\u7b2c\u4e00\u884c\u6578\u64da\u3002<\/p>\n<pre><code>SELECT * FROM table_name WHERE condition LIMIT 1;<\/code><\/pre>\n<h2 id=\"summary-clPecjDIzY\">\u7e3d\u7d50<\/h2>\n<p>\u900f\u904e\u4ed4\u7d30\u6aa2\u67e5\u4e26\u4fee\u6539\u67e5\u8a62\u8a9e\u53e5\u3001\u6dfb\u52a0\u5fc5\u8981\u7684\u806f\u63a5\u3001\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u4ee5\u53ca\u4f7f\u7528 LIMIT \u6216 FETCH FIRST 1 ROW ONLY \u4f86\u9650\u5236\u7d50\u679c\u96c6\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a PostgreSQL \u932f\u8aa4\u4ee3\u78bc: P0003 &#8211; too_many_rows\u3002\u9075\u5faa\u9019\u4e9b\u6b65\u9a5f\uff0c\u80fd\u78ba\u4fdd\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u6b63\u5e38\u904b\u4f5c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u4e14\u9ad8\u6548\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u6211\u5011\u63d0\u4f9b\u4e00\u6d41\u7684 VPS \u8a17\u7ba1\u670d\u52d9\uff0c\u70ba\u60a8\u7684 PostgreSQL \u53ca\u5176\u4ed6\u61c9\u7528\u7a0b\u5f0f\u5e36\u4f86\u5353\u8d8a\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4fee\u5fa9 PostgreSQL &#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-21498","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21498","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=21498"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21498\/revisions"}],"predecessor-version":[{"id":23969,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21498\/revisions\/23969"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}