{"id":178760,"date":"2024-11-08T20:40:18","date_gmt":"2024-11-08T12:40:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178760\/"},"modified":"2024-11-08T20:40:19","modified_gmt":"2024-11-08T12:40:19","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a2202g-invalid_tablesample_repeat%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178760\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2202G – invalid_tablesample_repeat\uff1f"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2202G – invalid_tablesample_repeat<\/h1>\n

\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f2202G – invalid_tablesample_repeat\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u8868\u6a23\u672c\u7684\u91cd\u8907\u4f7f\u7528\u6709\u95dc\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\u6216\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u4fee\u5fa9\u554f\u984c\u3002<\/p>\n

\u932f\u8aa4\u4ee3\u78bc2202G\u7684\u539f\u56e0<\/h2>\n

PostgreSQL\u76842202G\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528\u8868\u6a23\u672c\uff08tablesample\uff09\u6642\uff0c\u7576\u7528\u6236\u5617\u8a66\u5728\u540c\u4e00\u67e5\u8a62\u4e2d\u91cd\u8907\u4f7f\u7528\u76f8\u540c\u7684\u8868\u6a23\u672c\u6642\uff0c\u5c31\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002\u8868\u6a23\u672c\u662f\u4e00\u7a2e\u5f9e\u5927\u578b\u6578\u64da\u96c6\u4e2d\u96a8\u6a5f\u9078\u53d6\u6578\u64da\u7684\u6280\u8853\uff0c\u901a\u5e38\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u6216\u9032\u884c\u6578\u64da\u5206\u6790\u3002<\/p>\n

\u5177\u9ad4\u4f86\u8aaa\uff0c\u7576\u7528\u6236\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u591a\u6b21\u76f8\u540c\u7684\u8868\u6a23\u672c\u6642\uff0cPostgreSQL\u6703\u6aa2\u67e5\u9019\u4e9b\u6a23\u672c\u7684\u6709\u6548\u6027\u3002\u5982\u679c\u767c\u73fe\u91cd\u8907\u4f7f\u7528\uff0c\u5247\u6703\u8fd4\u56de2202G\u932f\u8aa4\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u8907\u96dc\u7684\u67e5\u8a62\u4e2d\uff0c\u7279\u5225\u662f\u7576\u4f7f\u7528\u4e86CTE\uff08\u516c\u7528\u8868\u8868\u9054\u5f0f\uff09\u6216\u5b50\u67e5\u8a62\u6642\u3002<\/p>\n

\u5982\u4f55\u4fee\u5fa92202G\u932f\u8aa4<\/h2>\n

\u4fee\u5fa92202G\u932f\u8aa4\u7684\u7b2c\u4e00\u6b65\u662f\u6aa2\u67e5\u67e5\u8a62\u4e2d\u662f\u5426\u5b58\u5728\u91cd\u8907\u7684\u8868\u6a23\u672c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n

1. \u6aa2\u67e5\u67e5\u8a62\u7d50\u69cb<\/h3>\n

\u9996\u5148\uff0c\u4ed4\u7d30\u6aa2\u67e5\u67e5\u8a62\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u6c92\u6709\u91cd\u8907\u7684\u8868\u6a23\u672c\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8a62\u53ef\u80fd\u6703\u5f15\u767c2202G\u932f\u8aa4\uff1a<\/p>\n

WITH sample_data AS (\n    SELECT * FROM your_table TABLESAMPLE SYSTEM (10)\n)\nSELECT * FROM sample_data\nUNION ALL\nSELECT * FROM sample_data;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0csample_data<\/code>\u88ab\u91cd\u8907\u4f7f\u7528\uff0c\u5c0e\u81f4\u932f\u8aa4\u3002\u53ef\u4ee5\u901a\u904e\u5c07\u67e5\u8a62\u91cd\u69cb\u70ba\u53ea\u4f7f\u7528\u4e00\u6b21\u8868\u6a23\u672c\u4f86\u89e3\u6c7a\u6b64\u554f\u984c\uff1a<\/p>\n
WITH sample_data AS (\n    SELECT * FROM your_table TABLESAMPLE SYSTEM (10)\n)\nSELECT * FROM sample_data;\n<\/code><\/pre>\n
2. \u4f7f\u7528\u4e0d\u540c\u7684\u8868\u6a23\u672c<\/h3>\n
\u5982\u679c\u9700\u8981\u5f9e\u540c\u4e00\u8868\u4e2d\u7372\u53d6\u591a\u500b\u6a23\u672c\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u4e0d\u540c\u7684\u8868\u6a23\u672c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u767e\u5206\u6bd4\u6216\u4e0d\u540c\u7684\u6a23\u672c\u65b9\u6cd5\u4f86\u7372\u53d6\u6578\u64da\uff1a<\/p>\n
WITH sample_data1 AS (\n    SELECT * FROM your_table TABLESAMPLE SYSTEM (10)\n),\nsample_data2 AS (\n    SELECT * FROM your_table TABLESAMPLE SYSTEM (20)\n)\nSELECT * FROM sample_data1\nUNION ALL\nSELECT * FROM sample_data2;\n<\/code><\/pre>\n
3. \u66f4\u65b0PostgreSQL\u7248\u672c<\/h3>\n
\u6709\u6642\u5019\uff0c\u7279\u5b9a\u7248\u672c\u7684PostgreSQL\u53ef\u80fd\u5b58\u5728\u5df2\u77e5\u7684\u932f\u8aa4\u6216\u9650\u5236\u3002\u6aa2\u67e5\u662f\u5426\u6709\u53ef\u7528\u7684\u66f4\u65b0\u7248\u672c\uff0c\u4e26\u8003\u616e\u5347\u7d1a\u5230\u6700\u65b0\u7248\u672c\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u932f\u8aa4\u4fee\u5fa9\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL\u932f\u8aa4\u4ee3\u78bc2202G – invalid_tablesample_repeat\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u4e2d\u91cd\u8907\u4f7f\u7528\u76f8\u540c\u7684\u8868\u6a23\u672c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u7d50\u69cb\u3001\u4f7f\u7528\u4e0d\u540c\u7684\u8868\u6a23\u672c\u6216\u66f4\u65b0PostgreSQL\u7248\u672c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc2202G – invalid_tablesample_repeat\uff0c\u89e3\u6c7a\u6578\u64da\u5eab\u53d6\u6a23\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-178760","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178760","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=178760"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178760\/revisions"}],"predecessor-version":[{"id":178761,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178760\/revisions\/178761"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}