I am interested in keeping a running history of every change which has happened on some tables in my database, thus being able to reconstruct historical states of the database for a开发者_如何学Cnalys
I\'m no DBA, I just want to learn about Oracle\'s Multi-Version Concurrency model. When launching a DML operation, the first step in the MVCC protocol is to开发者_运维技巧 bind a undo segment.The qu
say I want to do the following transactions in read committed mode (in postgres). T1: r(A) -> w(A) T2: r(A) -> w(A)
MongoDB is to me a great database. However there are cases where I really need atomic multi-document transactions. For example to transfer things (like money or reputation) between accounts and this n
I have located many resources on the web giving general overviews of MVCC (multi-version concurrency control) concepts, but no detailed technical references on exactly how it should work or be impleme
How can I add a che开发者_JAVA百科ckbox to each row of a MVCcontrib grid. then when the form is posted find out which records were selected? I Am not finding much when searching for this.
I have a simple (actually simplified :) ) scenario that is possibly the cause for the headache I\'ve been having for the last few days...
Now that Amazon\'s SimpleDB implements consistent reads and conditional update/delete it is possible to implement cross-domain transactions using MVCC.
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