rollback meaning

The common notation for JDBC manual transaction commit rollback has been that rollback is written after the commit catch:Try　　{ conn.setautocommit (false);　　Ps.executeupdate (); Ps.executeupdate (); conn.commit ();} Catch (Exception e) {

oracle| data Continued above: HTTP://WWW.CSDN.NET/DEVELOP/READ_ARTICLE.ASP?ID=20220 Ii. the database is activated. If you detect a data file that is missing or corrupted the rollback segment tablespace, and the database is running, do not drop it.

From the functional partition, the SQL language can be divided into three categories: Ddl,dml and DCL.1. DDL (Data Definition Language)A data definition language that defines and manages the language of all objects in a SQL

1. Add a new Object The mapping class mapped to the entity table is described earlier, user, if we want to persist it (Persist), then we need to add this object instance created by the user class to the session instance that we create earlier: The

/****** Related Parameters ****/Fast_start_parallel_rollback1. There are 3 kinds of values: False,low,high2. Value Meaning: False---Disable the parallel rollback featureLow---Parallel rollback max is 2*cpu_countHigh---Parallel rollback maximum is

1. Add a new Object The mapping class user mapped to the Entity table is described earlier, and if we want to persist it (Persist), then we need to add the object instance created by the user class to the session instance of our previous creation:

First say the problem encountered today, see a config.php configuration file has been in the state of modification, but and remote config.php is inconsistent, I do not need to submit it, but see it in the state of modified, very uncomfortable, want

Git version rollback, git version Let's talk about the problem encountered today. We can see a config. the php configuration file is always in the modified state, but with the remote config. php is inconsistent. I don't need to submit it, but it is

The JUnit Unit test framework is common but can disrupt database locality and a large number of hard-coded occurrences (Applicationcontext.getbean (""));Today, Buddy, let's introduce some annotations in spring test, a spring-brought jar package, to

When I updated my website, Xiao Bian accidentally found that the snapshot of the website was archived, and the rollback was very good, almost one week. I couldn't help but sweat. Although I could not rule out Baidu's algorithm adjustment, I think 80%