Re: the XID question

From: Filip Rembiałkowski <plk(dot)zuber(at)gmail(dot)com>
To: "Charles(dot)Hou" <givemeegn(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: the XID question
Date: 2011-01-19 12:00:43
Message-ID: AANLkTim8MsWWPw3hL_U_U2cdv3us24MgP7TwcFJp2hVy@mail.gmail.com
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2011/1/19 Charles.Hou <givemeegn(at)gmail(dot)com>:
> what's the definetion of XID?

XID == "Transaction ID".

> " select * from mybook" SQL command also increase the XID ?

Yes. Single SELECT is a transaction. Hence, it needs a transaction ID.

greets,
Filip

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