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Unsubscribe from updates to this bug at: https://bugs.mysql.com/77681 Updated by: Daniel che chung So Reported by: OCA Admin Category: Connector/J Severity: S3 (Non-critical) -Status: In progress +Status: Closed Version: 5.1.x OS: Any [20 Aug 23:25] Daniel che chung So Added the following entry to the Connector/J 5.1.37 changelog: "The code for executing a REPLACE statement when rewriteBatchedStatements=true has been refactored by putting multiple batched statements into a single query, making it work more like an INSERT statement. This increases the efficiency for running REPLACE statements. Thanks to Jie Han for contributing the patch." ------------------------------------------------------------------------ [21 Jul 9:17] jie han we have billions records transfer from offline to online , rewrite replace statement will save lots of bytes. and rewirte to one sql means don‘t need explicitly begin transaction ,because one sql will execute in a standalone transaction when autocommit is true,this save two request for every batch. where network is slow autocommit will save more time. hope rewrite replace statement will release in next version. ------------------------------------------------------------------------ [20 Jul 17:27] Filipe Silva Bug#40561 is a duplicate of this. ------------------------------------------------------------------------ [12 Jul 8:00] Umesh Umesh Hello! Thank you for the report and contribution. Thanks, Umesh
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原文地址：http://www.cnblogs.com/xhan/p/4767733.html
