PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u548c\u7279\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6307\u4ee4\u662f SAVEPOINT\uff0c\u5b83\u5141\u8a31\u4f7f\u7528\u8005\u5728\u4ea4\u6613\u4e2d\u5275\u5efa\u5132\u5b58\u9ede\u3002\u672c\u6587\u5c07\u63a2\u8a0e PostgreSQL \u4e2d SAVEPOINT \u6307\u4ee4\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n
\u5728\u6df1\u5165\u63a2\u8a0e SAVEPOINT \u6307\u4ee4\u4e4b\u524d\uff0c\u6211\u5011\u5148\u7c21\u55ae\u4e86\u89e3\u4e00\u4e0b PostgreSQL \u4e2d\u7684\u4ea4\u6613\u3002\u4ea4\u6613\u662f\u4e00\u7d44\u4f5c\u70ba\u55ae\u4f4d\u57f7\u884c\u7684 SQL \u8a9e\u53e5\uff0c\u78ba\u4fdd\u4ea4\u6613\u4e2d\u7684\u6240\u6709\u8a9e\u53e5\u8981\u9ebc\u5168\u90e8\u63d0\u4ea4\uff0c\u8981\u9ebc\u5168\u90e8\u56de\u6efe\u3002<\/p>\n
PostgreSQL \u4e2d\u7684\u4ea4\u6613\u63d0\u4f9b\u4e86 ACID \u7279\u6027\uff0c\u5373\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u548c\u6301\u4e45\u6027\u3002\u9019\u4e9b\u7279\u6027\u78ba\u4fdd\u5373\u4f7f\u5728\u5931\u6557\u7684\u60c5\u6cc1\u4e0b\uff0c\u8cc7\u6599\u5eab\u4ecd\u7136\u4fdd\u6301\u4e00\u81f4\u6027\u3002<\/p>\n
PostgreSQL \u4e2d\u7684 SAVEPOINT \u6307\u4ee4\u5141\u8a31\u4f7f\u7528\u8005\u5728\u4ea4\u6613\u4e2d\u5275\u5efa\u5132\u5b58\u9ede\u3002\u5132\u5b58\u9ede\u662f\u4ea4\u6613\u4e2d\u7684\u4e00\u500b\u5177\u540d\u9ede\uff0c\u5141\u8a31\u6211\u5011\u56de\u6efe\u81f3\u8a72\u9ede\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5c07\u4ea4\u6613\u5283\u5206\u70ba\u8f03\u5c0f\u55ae\u4f4d\u7684\u65b9\u5f0f\uff0c\u4e26\u5728\u9700\u8981\u6642\u9078\u64c7\u6027\u5730\u56de\u6efe\u81f3\u67d0\u500b\u7279\u5b9a\u7684\u5132\u5b58\u9ede\u3002<\/p>\n
\u5275\u5efa\u5132\u5b58\u9ede\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
SAVEPOINT savepoint_name;<\/code><\/pre>\n\u9019\u88e1\u7684 savepoint_name<\/code> \u662f\u5132\u5b58\u9ede\u7684\u540d\u7a31\uff0c\u5b83\u5728\u4ea4\u6613\u4e2d\u61c9\u8a72\u662f\u552f\u4e00\u7684\u3002<\/p>\n\u5728 PostgreSQL \u4e2d\u4f7f\u7528 SAVEPOINT<\/h2>\n
\u8b93\u6211\u5011\u901a\u904e\u4e00\u500b\u4f8b\u5b50\u4f86\u4e86\u89e3\u5982\u4f55\u5728 PostgreSQL \u4e2d\u4f7f\u7528 SAVEPOINT \u6307\u4ee4\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba employees<\/code> \u7684\u8868\u683c\uff0c\u5305\u542b id<\/code> \u548c name<\/code> \u6b04\u4f4d\u3002\u6211\u5011\u5e0c\u671b\u66f4\u65b0\u4e00\u540d\u54e1\u5de5\u7684\u59d3\u540d\uff0c\u4f46\u5982\u679c\u767c\u751f\u932f\u8aa4\uff0c\u6211\u5011\u5e0c\u671b\u56de\u6efe\u66f4\u6539\u3002<\/p>\n\u4ee5\u4e0b\u662f\u4f7f\u7528 SAVEPOINT \u6307\u4ee4\u9054\u6210\u6b64\u76ee\u7684\u7684\u65b9\u6cd5\uff1a<\/p>\n
BEGIN;\r\n\r\nSAVEPOINT update_employee;\r\n\r\nUPDATE employees SET name = 'John Doe' WHERE id = 1;\r\n\r\n-- \u57f7\u884c\u984d\u5916\u7684\u64cd\u4f5c\r\n\r\n-- \u5982\u679c\u767c\u751f\u932f\u8aa4\uff0c\u56de\u6efe\u81f3\u5132\u5b58\u9ede\r\nROLLBACK TO SAVEPOINT update_employee;\r\n\r\n-- \u5426\u5247\uff0c\u63d0\u4ea4\u66f4\u6539\r\nCOMMIT;<\/code><\/pre>\n\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 BEGIN<\/code> \u6307\u4ee4\u555f\u52d5\u4e00\u500b\u4ea4\u6613\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 SAVEPOINT \u6307\u4ee4\u5275\u5efa\u4e00\u500b\u540d\u70ba update_employee<\/code> \u7684\u5132\u5b58\u9ede\u3002\u63a5\u8457\uff0c\u6211\u5011\u66f4\u65b0 id<\/code> \u70ba 1 \u7684\u54e1\u5de5\u59d3\u540d\u3002\u5982\u679c\u5728\u96a8\u5f8c\u7684\u64cd\u4f5c\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 ROLLBACK TO SAVEPOINT<\/code> \u6307\u4ee4\u56de\u6efe\u5230\u8a72\u5132\u5b58\u9ede\u3002\u6700\u5f8c\uff0c\u5982\u679c\u4e00\u5207\u9806\u5229\uff0c\u6211\u5011\u4f7f\u7528 COMMIT<\/code> \u6307\u4ee4\u63d0\u4ea4\u66f4\u6539\u3002<\/p>\n\u7d50\u8ad6<\/h2>\n
PostgreSQL \u4e2d\u7684 SAVEPOINT \u6307\u4ee4\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5728\u4ea4\u6613\u4e2d\u5275\u5efa\u5132\u5b58\u9ede\u7684\u5f37\u5927\u6a5f\u5236\u3002\u5b83\u5141\u8a31\u4f7f\u7528\u8005\u5c07\u4ea4\u6613\u5283\u5206\u70ba\u8f03\u5c0f\u7684\u55ae\u4f4d\uff0c\u4e26\u5728\u9700\u8981\u6642\u9078\u64c7\u6027\u5730\u56de\u6efe\u81f3\u67d0\u500b\u7279\u5b9a\u7684\u5132\u5b58\u9ede\u3002\u901a\u904e\u4f7f\u7528\u5132\u5b58\u9ede\uff0c\u6211\u5011\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u4e26\u6709\u6548\u8655\u7406\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u932f\u8aa4\u3002<\/p>\n
\u6458\u8981<\/h2>\n
\u7e3d\u7d50\u4f86\u8aaa\uff0cPostgreSQL \u4e2d\u7684 SAVEPOINT \u6307\u4ee4\u5141\u8a31\u4f7f\u7528\u8005\u5728\u4ea4\u6613\u4e2d\u5275\u5efa\u5132\u5b58\u9ede\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5c07\u4ea4\u6613\u5283\u5206\u70ba\u8f03\u5c0f\u55ae\u4f4d\u7684\u65b9\u5f0f\uff0c\u4e26\u5728\u9700\u8981\u6642\u9078\u64c7\u6027\u5730\u56de\u6efe\u81f3\u7279\u5b9a\u7684\u5132\u5b58\u9ede\u3002\u901a\u904e\u4f7f\u7528\u5132\u5b58\u9ede\uff0c\u6211\u5011\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\uff0c\u4e26\u6709\u6548\u8655\u7406\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u932f\u8aa4\u3002\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc PostgreSQL \u53ca\u5176\u529f\u80fd\uff0c\u5efa\u8b70\u63a2\u7d22 Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u63d0\u4f9b\u53ef\u9760\u548c\u9ad8\u6548\u80fd\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u7684\u9818\u5148 VPS \u8a17\u7ba1\u516c\u53f8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"PostgreSQL \u6307\u4ee4\uff1aSA...<\/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-20376","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20376","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=20376"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20376\/revisions"}],"predecessor-version":[{"id":24373,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20376\/revisions\/24373"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}