this chapter introduces mvcc
http://www.interdb.jp/pg/pgsql05.html
原始訊息 自： rajan <vgmon...@gmail.com> 日期： 2017/7/1 14:32
(GMT+08:00) 至： pgsql-general@postgresql.org 主旨： [GENERAL] have trouble
understanding xmin and xmax with update operations from two different se
On 06/30/2017 11:32 PM, rajan wrote:
have trouble understanding xmin and xmax with update operations from two
different sessions
So, as found below, Session2 is trying to update a row which is already
updated with a different value and it's update fails with *UPDATE 0*
But from Session3, I see
have trouble understanding xmin and xmax with update operations from two
different sessions
So, as found below, Session2 is trying to update a row which is already
updated with a different value and it's update fails with *UPDATE 0*
But from Session3, I see that xmax value is visible as
