{"id":20650,"date":"2024-01-02T05:20:25","date_gmt":"2024-01-02T05:20:25","guid":{"rendered":"https:\/\/server.hk\/blog\/20650\/"},"modified":"2024-11-14T10:39:21","modified_gmt":"2024-11-14T02:39:21","slug":"postgresql-command-prepare-transaction","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20650\/","title":{"rendered":"PostgreSQL \u547d\u4ee4: PREPARE TRANSACTION"},"content":{"rendered":"

PostgreSQL \u547d\u4ee4: PREPARE TRANSACTION<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u5ee3\u6cdb\u7684\u529f\u80fd\u548c\u80fd\u529b\u3002PREPARE TRANSACTION<\/code> \u662f PostgreSQL \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\uff0c\u8b93\u4f60\u53ef\u4ee5\u6e96\u5099\u4ea4\u6613\u4ee5\u4fbf\u7a0d\u5f8c\u57f7\u884c\uff0c\u5f9e\u800c\u70ba\u6578\u64da\u5eab\u64cd\u4f5c\u63d0\u4f9b\u9748\u6d3b\u6027\u548c\u63a7\u5236\u6b0a\u3002<\/p>\n

\u4e86\u89e3 PostgreSQL \u4e2d\u7684\u4ea4\u6613<\/h2>\n

\u5728 PostgreSQL \u4e2d\uff0c\u4ea4\u6613\u662f\u4e00\u7cfb\u5217\u4f5c\u70ba\u4e00\u500b\u55ae\u4f4d\u57f7\u884c\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u4ea4\u6613\u53ef\u4ee5\u901a\u904e\u5c07\u591a\u500b\u64cd\u4f5c\u7d44\u5408\u5728\u4e00\u8d77\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5982\u679c\u4ea4\u6613\u4e2d\u7684\u4efb\u4f55\u90e8\u5206\u5931\u6557\uff0c\u6240\u6709\u5728\u8a72\u4ea4\u6613\u4e2d\u7684\u8b8a\u66f4\u90fd\u53ef\u4ee5\u88ab\u56de\u6efe\uff0c\u5f9e\u800c\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/p>\n

PostgreSQL \u7684\u4ea4\u6613\u9075\u5faa ACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u3001\u6301\u4e45\u6027\uff09\u5c6c\u6027\uff0c\u9019\u4fdd\u8b49\u4e86\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u53ef\u9760\u6027\u548c\u53ef\u9810\u6e2c\u6027\u3002<\/p>\n

PREPARE TRANSACTION \u547d\u4ee4<\/h2>\n

PostgreSQL \u4e2d\u7684 PREPARE TRANSACTION<\/code> \u547d\u4ee4\u8b93\u4f60\u53ef\u4ee5\u6e96\u5099\u4e00\u500b\u4ea4\u6613\u4ee5\u4fbf\u7a0d\u5f8c\u57f7\u884c\u3002\u9019\u5728\u9700\u8981\u5ef6\u9072\u4ea4\u6613\u57f7\u884c\u81f3\u7279\u5b9a\u689d\u4ef6\u6eff\u8db3\u6642\uff0c\u6216\u7576\u4f60\u5e0c\u671b\u540c\u6642\u57f7\u884c\u591a\u500b\u4ea4\u6613\u6642\u7279\u5225\u6709\u7528\u3002<\/p>\n

PREPARE TRANSACTION<\/code> \u547d\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

PREPARE TRANSACTION 'transaction_name';\r\n<\/code><\/pre>\n
\u6b64\u8655\u7684 ‘transaction_name’ \u662f\u4e00\u500b\u7528\u6236\u81ea\u5b9a\u7fa9\u7684\u6e96\u5099\u4ea4\u6613\u540d\u7a31\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u6709\u6548\u7684\u63cf\u8ff0\u8a72\u4ea4\u6613\u7684\u5b57\u4e32\u3002<\/p>\n
\u4e00\u65e6\u4ea4\u6613\u88ab\u6e96\u5099\u597d\uff0c\u4fbf\u53ef\u4f7f\u7528 COMMIT PREPARED<\/code> \u547d\u4ee4\u4f86\u57f7\u884c\u8a72\u4ea4\u6613\u3002\u57f7\u884c\u6e96\u5099\u4ea4\u6613\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
COMMIT PREPARED 'transaction_name';\r\n<\/code><\/pre>\n
\u4f7f\u7528 PREPARE TRANSACTION<\/code> \u547d\u4ee4\uff0c\u4f60\u53ef\u4ee5\u5c07\u4ea4\u6613\u57f7\u884c\u5ef6\u5f8c\uff0c\u5f9e\u800c\u63a7\u5236\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6642\u9593\u548c\u9806\u5e8f\u3002<\/p>\n
\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n
\u8b93\u6211\u5011\u8003\u616e\u4e00\u500b\u4f8b\u5b50\uff1a\u5047\u8a2d\u4f60\u6709\u4e00\u500b\u8655\u7406\u8a02\u55ae\u7684\u96fb\u5b50\u5546\u52d9\u61c9\u7528\u7a0b\u5f0f\u3002\u7576\u5ba2\u6236\u4e0b\u55ae\u6642\uff0c\u4f60\u5e0c\u671b\u5728\u5eab\u5b58\u4e2d\u9810\u7559\u5546\u54c1\uff0c\u4e26\u5411\u5ba2\u6236\u7684\u4fe1\u7528\u5361\u6536\u8cbb\u3002\u7136\u800c\uff0c\u4f60\u53ea\u5e0c\u671b\u5728\u5546\u54c1\u53ef\u7528\u6642\u624d\u6536\u53d6\u4fe1\u7528\u5361\u8cbb\u7528\u3002<\/p>\n
\u4f60\u53ef\u4ee5\u4f7f\u7528 PREPARE TRANSACTION<\/code> \u547d\u4ee4\u4f86\u6e96\u5099\u6536\u53d6\u4fe1\u7528\u5361\u7684\u4ea4\u6613\u3002\u5982\u679c\u5546\u54c1\u53ef\u7528\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 COMMIT PREPARED<\/code> \u547d\u4ee4\u4f86\u57f7\u884c\u6e96\u5099\u597d\u7684\u4ea4\u6613\u3002\u5982\u679c\u5546\u54c1\u4e0d\u53ef\u7528\uff0c\u4f60\u53ef\u4ee5\u653e\u68c4\u8a72\u6e96\u5099\u597d\u7684\u4ea4\u6613\u800c\u4e0d\u57f7\u884c\u5b83\u3002<\/p>\n
PREPARE TRANSACTION 'charge_credit_card';\r\n\r\n-- \u6aa2\u67e5\u5eab\u5b58\u548c\u5546\u54c1\u53ef\u7528\u6027\r\nIF items_available() THEN\r\n    COMMIT PREPARED 'charge_credit_card';\r\nELSE\r\n    -- \u653e\u68c4\u6e96\u5099\u597d\u7684\u4ea4\u6613\r\n    ROLLBACK PREPARED 'charge_credit_card';\r\nEND IF;\r\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cPREPARE TRANSACTION<\/code> \u547d\u4ee4\u6e96\u5099\u4e86\u6536\u53d6\u4fe1\u7528\u5361\u7684\u4ea4\u6613\u3002items_available()<\/code> \u51fd\u6578\u6aa2\u67e5\u5eab\u5b58\u548c\u5546\u54c1\u7684\u53ef\u7528\u6027\u3002\u5982\u679c\u5546\u54c1\u53ef\u7528\uff0c\u5247\u4f7f\u7528 COMMIT PREPARED<\/code> \u57f7\u884c\u6e96\u5099\u597d\u7684\u4ea4\u6613\u3002\u5426\u5247\uff0c\u5247\u4f7f\u7528 ROLLBACK PREPARED<\/code> \u653e\u68c4\u8a72\u4ea4\u6613\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
PostgreSQL \u4e2d\u7684 PREPARE TRANSACTION<\/code> \u547d\u4ee4\u63d0\u4f9b\u4e86\u4e00\u500b\u5f37\u5927\u7684\u6a5f\u5236\uff0c\u8b93\u4f60\u53ef\u4ee5\u6e96\u5099\u4ea4\u6613\u4ee5\u4fbf\u7a0d\u5f8c\u57f7\u884c\u3002\u5b83\u5141\u8a31\u4f60\u63a7\u5236\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6642\u9593\u548c\u9806\u5e8f\uff0c\u5f9e\u800c\u70ba\u61c9\u7528\u7a0b\u5f0f\u884c\u70ba\u63d0\u4f9b\u9748\u6d3b\u6027\u548c\u63a7\u5236\u529b\u3002<\/p>\n
\u901a\u904e\u4f7f\u7528 PREPARE TRANSACTION<\/code> \u547d\u4ee4\uff0c\u4f60\u53ef\u4ee5\u5ef6\u9072\u4ea4\u6613\u7684\u57f7\u884c\uff0c\u76f4\u5230\u7279\u5b9a\u689d\u4ef6\u6eff\u8db3\uff0c\u5f9e\u800c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc PostgreSQL \u53ca\u5176\u529f\u80fd\u7684\u8cc7\u8a0a\uff0c\u8acb\u8003\u616e\u63a2\u7d22 Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u9593\u9818\u5148\u7684 VPS \u8a17\u7ba1\u516c\u53f8\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6548\u80fd\u7684\u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PostgreSQL \u547d\u4ee4: P...<\/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-20650","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20650","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=20650"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20650\/revisions"}],"predecessor-version":[{"id":24362,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20650\/revisions\/24362"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}