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Re: How to safely compare transaction id? - Mailing list pgsql-general

From Tom Lane
Subject Re: How to safely compare transaction id?
Date
Msg-id 6244.1200245608@sss.pgh.pa.us
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In response to Re: How to safely compare transaction id?  (alphax <alphax@vip.163.com>)
Responses Re: How to safely compare transaction id?
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alphax <alphax@vip.163.com> writes:
> So, it seems the system column "cmin" is the logical "current version"
> of that record, isn't it?

No.  Have you read
http://www.postgresql.org/docs/8.2/static/ddl-system-columns.html

            regards, tom lane

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