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How to safely compare transaction id?

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To: pg-general <pgsql-general@xxxxxxxxxxxxxx>
Subject: How to safely compare transaction id?
From: alphax <alphax@xxxxxxxxxxx>
Date: Fri, 11 Jan 2008 21:49:20 +0800
User-agent: Thunderbird 2.0.0.9 (Windows/20071031)

Hi,

I want to compare the record's transaction id in sql statements or
PL/pgSQL stored procedure. Are there any system function or operator can
safely(transaction id wraparound safed) compare the transaction id?

Thanks!



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