{"id":20377,"date":"2024-01-02T05:10:23","date_gmt":"2024-01-02T05:10:23","guid":{"rendered":"https:\/\/server.hk\/blog\/20377\/"},"modified":"2024-11-14T10:39:31","modified_gmt":"2024-11-14T02:39:31","slug":"postgresql-command-rollback-to-savepoint","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20377\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aROLLBACK TO SAVEPOINT"},"content":{"rendered":"<h1 id=\"postgresql-command-rollback-to-savepoint-BGVKZFDRYJ\">PostgreSQL \u547d\u4ee4\uff1aROLLBACK TO SAVEPOINT<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u591a\u7a2e\u529f\u80fd\u548c\u7279\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\u662f <code>ROLLBACK TO SAVEPOINT<\/code>\u3002\u6b64\u547d\u4ee4\u5141\u8a31\u60a8\u64a4\u92b7\u4e8b\u52d9\uff0c\u4e26\u8fd4\u56de\u5230\u8a72\u4e8b\u52d9\u4e2d\u7684\u67d0\u500b\u7279\u5b9a\u4fdd\u5b58\u9ede\u3002<\/p>\n<h2 id=\"understanding-transactions-and-savepoints-BGVKZFDRYJ\">\u4e86\u89e3\u4e8b\u52d9\u548c\u4fdd\u5b58\u9ede<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u4e8b\u52d9\u662f\u4e00\u7cfb\u5217\u4f5c\u70ba\u4e00\u500b\u55ae\u4f4d\u57f7\u884c\u7684 SQL \u8a9e\u53e5\u3002\u4e8b\u52d9\u901a\u904e\u5c07\u591a\u500b\u64cd\u4f5c\u8996\u70ba\u4e00\u500b\u908f\u8f2f\u55ae\u5143\u4f86\u4fdd\u8b49\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5982\u679c\u4e8b\u52d9\u4e2d\u7684\u4efb\u4f55\u90e8\u5206\u5931\u6557\uff0c\u6574\u500b\u4e8b\u52d9\u5c07\u88ab\u56de\u6efe\uff0c\u64a4\u92b7\u8a72\u4e8b\u52d9\u4e2d\u9032\u884c\u7684\u6240\u6709\u66f4\u6539\u3002<\/p>\n<p>\u4fdd\u5b58\u9ede\u5247\u662f\u4e8b\u52d9\u4e2d\u7684\u6a19\u8a18\uff0c\u5141\u8a31\u60a8\u5275\u5efa\u56de\u6efe\u7684\u9ede\u3002\u4fdd\u5b58\u9ede\u975e\u5e38\u6709\u7528\uff0c\u7576\u60a8\u60f3\u64a4\u92b7\u4e8b\u52d9\u7684\u4e00\u90e8\u5206\u800c\u4e0d\u56de\u6efe\u6574\u500b\u4e8b\u52d9\u6642\u53ef\u4ee5\u4f7f\u7528\u5b83\u3002<\/p>\n<h2 id=\"using-rollback-to-savepoint-BGVKZFDRYJ\">\u4f7f\u7528 ROLLBACK TO SAVEPOINT<\/h2>\n<p><code>ROLLBACK TO SAVEPOINT<\/code> \u547d\u4ee4\u7528\u65bc\u64a4\u92b7\u4e8b\u52d9\uff0c\u4e26\u8fd4\u56de\u5230\u8a72\u4e8b\u52d9\u4e2d\u7684\u67d0\u500b\u7279\u5b9a\u4fdd\u5b58\u9ede\u3002\u6b64\u547d\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ROLLBACK TO SAVEPOINT savepoint_name;\r\n<\/code><\/pre>\n<p>\u6b64\u8655\u7684 <code>savepoint_name<\/code> \u662f\u60a8\u8981\u56de\u6efe\u7684\u4fdd\u5b58\u9ede\u540d\u7a31\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8a72\u4fdd\u5b58\u9ede\u5fc5\u9808\u5df2\u7d93\u5728\u4e8b\u52d9\u4e2d\u901a\u904e <code>SAVEPOINT<\/code> \u547d\u4ee4\u5b9a\u7fa9\u3002<\/p>\n<p>\u7576\u57f7\u884c <code>ROLLBACK TO SAVEPOINT<\/code> \u547d\u4ee4\u6642\uff0c\u6240\u6709\u5728\u6307\u5b9a\u4fdd\u5b58\u9ede\u4e4b\u5f8c\u9032\u884c\u7684\u66f4\u6539\u90fd\u6703\u88ab\u64a4\u92b7\uff0c\u4e8b\u52d9\u56de\u6efe\u81f3\u8a72\u4fdd\u5b58\u9ede\u3002\u4efb\u4f55\u5728\u8a72\u4fdd\u5b58\u9ede\u4e4b\u5f8c\u5275\u5efa\u7684\u4fdd\u5b58\u9ede\u4e5f\u6703\u88ab\u91cb\u653e\u3002<\/p>\n<h2 id=\"example-BGVKZFDRYJ\">\u7bc4\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u770b\u4e00\u500b\u7bc4\u4f8b\u4f86\u7406\u89e3 <code>ROLLBACK TO SAVEPOINT<\/code> \u547d\u4ee4\u662f\u5982\u4f55\u904b\u4f5c\u7684\uff1a<\/p>\n<pre><code>BEGIN;\r\n\r\nINSERT INTO employees (id, name, salary) VALUES (1, 'John Doe', 5000);\r\nSAVEPOINT sp1;\r\n\r\nINSERT INTO employees (id, name, salary) VALUES (2, 'Jane Smith', 6000);\r\nSAVEPOINT sp2;\r\n\r\nINSERT INTO employees (id, name, salary) VALUES (3, 'Mike Johnson', 7000);\r\n\r\nROLLBACK TO SAVEPOINT sp1;\r\n\r\nCOMMIT;\r\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>BEGIN<\/code> \u547d\u4ee4\u555f\u52d5\u4e00\u500b\u4e8b\u52d9\u3002\u6211\u5011\u96a8\u5f8c\u5728 &#8220;employees&#8221; \u8868\u4e2d\u63d2\u5165\u4e09\u689d\u8a18\u9304\u3002\u5728\u63d2\u5165\u7b2c\u4e00\u689d\u8a18\u9304\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 <code>SAVEPOINT<\/code> \u547d\u4ee4\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba &#8220;sp1&#8221; \u7684\u4fdd\u5b58\u9ede\u3002\u540c\u6a23\u5730\uff0c\u6211\u5011\u5728\u63d2\u5165\u7b2c\u4e8c\u689d\u8a18\u9304\u5f8c\u5275\u5efa\u4e86\u53e6\u4e00\u500b\u540d\u70ba &#8220;sp2&#8221; \u7684\u4fdd\u5b58\u9ede\u3002<\/p>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u63d2\u5165\u4e86\u7b2c\u4e09\u689d\u8a18\u9304\uff0c\u7136\u5f8c\u6c7a\u5b9a\u4f7f\u7528 <code>ROLLBACK TO SAVEPOINT<\/code> \u547d\u4ee4\u56de\u6efe\u81f3\u4fdd\u5b58\u9ede &#8220;sp1&#8243;\u3002\u6b64\u547d\u4ee4\u64a4\u92b7\u4e86\u7b2c\u4e09\u689d\u8a18\u9304\u7684\u63d2\u5165\uff0c\u4e26\u91cb\u653e\u4e86\u4fdd\u5b58\u9ede &#8220;sp2&#8243;\u3002\u6700\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 <code>COMMIT<\/code> \u547d\u4ee4\u63d0\u4ea4\u4e86\u4e8b\u52d9\u3002<\/p>\n<h2 id=\"summary-BGVKZFDRYJ\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>ROLLBACK TO SAVEPOINT<\/code> \u547d\u4ee4\u5141\u8a31\u60a8\u64a4\u92b7\u4e8b\u52d9\uff0c\u4e26\u8fd4\u56de\u5230\u8a72\u4e8b\u52d9\u4e2d\u7684\u67d0\u500b\u7279\u5b9a\u4fdd\u5b58\u9ede\u3002\u4fdd\u5b58\u9ede\u901a\u904e\u5141\u8a31\u60a8\u50c5\u56de\u6efe\u4e8b\u52d9\u7684\u4e00\u90e8\u5206\u800c\u4e0d\u5f71\u97ff\u6574\u500b\u4e8b\u52d9\uff0c\u70ba\u4e8b\u52d9\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u3002\u7406\u89e3\u4e26\u6709\u6548\u5730\u4f7f\u7528\u6b64\u547d\u4ee4\uff0c\u5c07\u6709\u52a9\u65bc\u60a8\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc VPS \u8a17\u7ba1\u670d\u52d9\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4\uff1aRO&#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":[4924],"tags":[],"class_list":["post-20377","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20377","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=20377"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20377\/revisions"}],"predecessor-version":[{"id":24372,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20377\/revisions\/24372"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}