STORAGE: Time versions and Delta records

From: "F J Cuberos" <fjcuberos(at)infomail(dot)lacaixa(dot)es>
To: <pgsql-general(at)postgresql(dot)org>
Subject: STORAGE: Time versions and Delta records
Date: 1999-09-16 17:02:11
Message-ID: 002201bf0067$0a35e940$eccf35c3@default
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Some questions about the storage system:

How PostgreSQL store tuples? Using the Postgre (no SQL) mechanism of an
anchor pointer (to the original tuple) and a list of pointers to the (delta
tuples) differences with the initial register?

It´s possible access to the value of a tuple in a specified time? Or only
acces to the actual value?

What function access the value of a tuple from the disk?

Thanks everybody.

Francisco Javier Cuberos.

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