All the methods specified here for explicit database rollbacks clear any global temporary tables and prevent the runtime error COMMIT_GTT_ERROR in the case of implicit database commits.
So even though the second create table does commit, this leaves the original transaction alone. So you can still roll it back. If you need to create a table part-way through a transaction before 18c, this is the way to do it. If you want to try it out: Copy code snippet Copied to...
Database rollback 0 I was interested in the question by Rene Smit about how to force a database-level commit to occur from within a microflow by ending the transaction prematurely. Would it be possible to force a rollback by similar means? I would like to restore the database to the s...
COMMIT SQL 语句1 SQL 语句2 …… ROLLBACK 隐式方式 当用户没有显式地定义事务时, DBMS按缺省规定自动划分事务 事务结束 COMMIT 事务正常结束 ROLLBACK 提交事务的所有操作(读 +更新) 事务中所有对数据库的更 新永久生效 事务异常终止 事务运行的过程中发生了 故障,不能继续执行 回滚事务的所有更新操作 事务...
MySQL powers the most demanding Web, E-commerce, SaaS and Online Transaction Processing (OLTP) applications. It is a fully integrated transaction-safe, ACID compliant database with full commit, rollback, crash recovery and row level locking capabilities. MySQL delivers the ease of use, scalability...
MySQL powers the most demanding Web, E-commerce, SaaS and Online Transaction Processing (OLTP) applications. It is a fully integrated transaction-safe, ACID compliant database with full commit, rollback, crash recovery and row level locking capabilities. MySQL delivers the ease of use, scalability...
Rollback Transaction >> No Nest Transaction Use SavePoint instead. SAVEPOINTsare a method of creating transactions, similar to BEGIN and COMMIT, except that the SAVEPOINT and RELEASE commands are named and may be nested. Create SAVEPOINT
可能事务完成后,没有写入 block,这个时候,假设事务 commit 了,显然,我们需要 redo 这些变更 同时,需要考虑的还有 concurrency control 的语义:同一个object, 被 txn1 写入之后,在 txn1 commit/abort 之前被 txn2 写入了应该怎么办呢?幸运的是,如果我们采用的是 strict 2PL 协议,这里并不会有这种情况。而 ts...
Aborted, after the transaction has been rolled back and the database has been restored to its state prior to the start of the transaction. Committed, after successful completion. 因此,更准确的对事务 commited, aborted, terminated 的定义为:We say that a transaction has committed only if it ha...
COMMIT,ROLLBACK, or non-DML statements (such asSETROLE,ALTERSYSTEM,LOCKTABLE) are allowed in the transaction. Otherwise, an error is returned. ACOMMIT,ROLLBACK, or DDL statement terminates the read-only transaction; a DDL statement causes an implicit commit of the read-only transaction and ...