Re: PostgreSQL clustering VS MySQL clustering

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Hannu Krosing <hannu(at)tm(dot)ee>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>, marty(at)outputservices(dot)com, herve(at)elma(dot)fr, pgsql-performance(at)postgresql(dot)org
Subject: Re: PostgreSQL clustering VS MySQL clustering
Date: 2005-01-25 15:41:53
Message-ID: 3582.1106667713@sss.pgh.pa.us
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Hannu Krosing <hannu(at)tm(dot)ee> writes:
> Why is removing index entries essential ?

Because once you re-use the tuple slot, any leftover index entries would
be pointing to the wrong rows.

regards, tom lane

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