xor for text

From: <btober(at)seaworthysys(dot)com>
To: <pgsql-general(at)postgresql(dot)org>
Subject: xor for text
Date: 2003-12-04 20:59:52
Message-ID: 64453.216.238.112.88.1070571592.squirrel@$HOSTNAME
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Anyone have a good function for byte-by-byte XOR of text or varchar data
(or does one exist already in pg which I missed in the documentation)?

~Berend Tober

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