{"id":178958,"date":"2024-11-08T21:49:18","date_gmt":"2024-11-08T13:49:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178958\/"},"modified":"2024-11-08T21:49:19","modified_gmt":"2024-11-08T13:49:19","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%9a3b000-savepoint_exception%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178958\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a3B000 &#8211; savepoint_exception\uff1f"},"content":{"rendered":"<h1 id=\"%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%9a3b000-savepoint_exception-HZdhDMqODC\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a3B000 &#8211; savepoint_exception<\/h1>\n<p>\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\u662f\u932f\u8aa4\u4ee3\u78bc3B000\uff0c\u9019\u901a\u5e38\u8207savepoint\u7684\u4f7f\u7528\u6709\u95dc\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u4e8b\u52d9\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsavepoint%ef%bc%9f-HZdhDMqODC\">\u4ec0\u9ebc\u662fSavepoint\uff1f<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0csavepoint\u662f\u4e00\u7a2e\u5141\u8a31\u958b\u767c\u8005\u5728\u4e8b\u52d9\u4e2d\u8a2d\u7f6e\u6a19\u8a18\u7684\u529f\u80fd\u3002\u9019\u6a23\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4e8b\u52d9\u4e2d\u56de\u6efe\u5230\u7279\u5b9a\u7684savepoint\uff0c\u800c\u4e0d\u662f\u56de\u6efe\u6574\u500b\u4e8b\u52d9\u3002\u9019\u5c0d\u65bc\u9700\u8981\u90e8\u5206\u56de\u6efe\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc3b000%e7%9a%84%e5%90%ab%e7%be%a9-HZdhDMqODC\">\u932f\u8aa4\u4ee3\u78bc3B000\u7684\u542b\u7fa9<\/h2>\n<p>\u932f\u8aa4\u4ee3\u78bc3B000\u8868\u793a\u201csavepoint_exception\u201d\uff0c\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5617\u8a66\u5728\u4e00\u500b\u5df2\u7d93\u56de\u6efe\u7684\u4e8b\u52d9\u4e2d\u4f7f\u7528savepoint\u3002<\/li>\n<li>\u5728\u4e00\u500b\u672a\u958b\u59cb\u7684\u4e8b\u52d9\u4e2d\u8a2d\u7f6esavepoint\u3002<\/li>\n<li>\u5728\u4e00\u500b\u5df2\u7d93\u63d0\u4ea4\u7684\u4e8b\u52d9\u4e2d\u4f7f\u7528savepoint\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u60c5\u6cc1\u90fd\u6703\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u8b58\u5225savepoint\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc3b000-HZdhDMqODC\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc3B000<\/h2>\n<p>\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u7684\u95dc\u9375\u5728\u65bc\u6b63\u78ba\u7ba1\u7406\u4e8b\u52d9\u548csavepoint\u7684\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u6b65\u9a5f\u548c\u5efa\u8b70\uff1a<\/p>\n<h3 id=\"1-%e7%a2%ba%e4%bf%9d%e4%ba%8b%e5%8b%99%e5%b7%b2%e7%b6%93%e9%96%8b%e5%a7%8b-HZdhDMqODC\">1. \u78ba\u4fdd\u4e8b\u52d9\u5df2\u7d93\u958b\u59cb<\/h3>\n<p>\u5728\u8a2d\u7f6esavepoint\u4e4b\u524d\uff0c\u5fc5\u9808\u78ba\u4fdd\u4e8b\u52d9\u5df2\u7d93\u958b\u59cb\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff1a<\/p>\n<pre><code>BEGIN;<\/code><\/pre>\n<p>\u7136\u5f8c\uff0c\u60a8\u53ef\u4ee5\u5b89\u5168\u5730\u8a2d\u7f6esavepoint\uff1a<\/p>\n<pre><code>SAVEPOINT my_savepoint;<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e4%ba%8b%e5%8b%99%e7%8b%80%e6%85%8b-HZdhDMqODC\">2. \u6aa2\u67e5\u4e8b\u52d9\u72c0\u614b<\/h3>\n<p>\u5728\u4f7f\u7528savepoint\u4e4b\u524d\uff0c\u6aa2\u67e5\u4e8b\u52d9\u7684\u72c0\u614b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5982\u679c\u4e8b\u52d9\u5df2\u7d93\u88ab\u56de\u6efe\u6216\u63d0\u4ea4\uff0c\u5247\u7121\u6cd5\u518d\u4f7f\u7528savepoint\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u6aa2\u67e5\u4e8b\u52d9\u72c0\u614b\uff1a<\/p>\n<pre><code>SELECT txid_current();<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u4e8b\u52d9\u7684ID\uff0c\u5e6b\u52a9\u60a8\u78ba\u8a8d\u4e8b\u52d9\u662f\u5426\u4ecd\u7136\u6709\u6548\u3002<\/p>\n<h3 id=\"3-%e6%ad%a3%e7%a2%ba%e8%99%95%e7%90%86%e5%9b%9e%e6%bb%be-HZdhDMqODC\">3. \u6b63\u78ba\u8655\u7406\u56de\u6efe<\/h3>\n<p>\u5982\u679c\u9700\u8981\u56de\u6efe\u5230\u67d0\u500bsavepoint\uff0c\u8acb\u78ba\u4fdd\u60a8\u53ea\u56de\u6efe\u5230\u5c1a\u672a\u88ab\u56de\u6efe\u7684savepoint\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ROLLBACK TO SAVEPOINT my_savepoint;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u56e0\u70ba\u56de\u6efe\u5230\u5df2\u7d93\u7121\u6548\u7684savepoint\u800c\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e4%be%8b%e5%a4%96%e8%99%95%e7%90%86-HZdhDMqODC\">4. \u4f7f\u7528\u4f8b\u5916\u8655\u7406<\/h3>\n<p>\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u4f7f\u7528\u4f8b\u5916\u8655\u7406\u4f86\u6355\u7372\u548c\u8655\u7406\u9019\u4e9b\u932f\u8aa4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\u4e26\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6236\u9ad4\u9a57\u3002\u4f8b\u5982\uff0c\u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u9019\u6a23\u8655\u7406\uff1a<\/p>\n<pre><code>\ntry:\n    # \u958b\u59cb\u4e8b\u52d9\n    cursor.execute(\"BEGIN;\")\n    cursor.execute(\"SAVEPOINT my_savepoint;\")\n    # \u5176\u4ed6SQL\u64cd\u4f5c\nexcept Exception as e:\n    print(\"\u767c\u751f\u932f\u8aa4:\", e)\n    cursor.execute(\"ROLLBACK TO SAVEPOINT my_savepoint;\")\nfinally:\n    cursor.execute(\"COMMIT;\")\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-HZdhDMqODC\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc3B000 &#8211; savepoint_exception\u901a\u5e38\u662f\u7531\u65bc\u4e0d\u7576\u4f7f\u7528savepoint\u6216\u4e8b\u52d9\u72c0\u614b\u4e0d\u6b63\u78ba\u5f15\u8d77\u7684\u3002\u901a\u904e\u78ba\u4fdd\u4e8b\u52d9\u5df2\u7d93\u958b\u59cb\u3001\u6aa2\u67e5\u4e8b\u52d9\u72c0\u614b\u3001\u6b63\u78ba\u8655\u7406\u56de\u6efe\u4ee5\u53ca\u4f7f\u7528\u4f8b\u5916\u8655\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u548c\u4fee\u5fa9\u9019\u4e00\u932f\u8aa4\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684PostgreSQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u63d0\u4f9b\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc3B000 &#8211; savepoint_exception\uff0c\u89e3\u6c7a\u4fdd\u5b58\u9ede\u7570\u5e38\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u9806\u5229\u9032\u884c\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-178958","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178958","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=178958"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178958\/revisions"}],"predecessor-version":[{"id":178959,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178958\/revisions\/178959"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}