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From: Hubert Lubaczewski <hubert.lubaczewski@eo.pl>
To: Rudi Starcevic <rudi@oasis.net.au>
Cc: pgsql-sql@postgresql.org
Subject: Re: Bitwise operation
Date: Mon, 30 Jun 2003 14:36:31 +0200
Message-ID: <20030630143631.794015db.hubert.lubaczewski@eo.pl> (raw)
In-Reply-To: <20030630122815.M76087@oasis.net.au>
References: <20030630122815.M76087@oasis.net.au>

On Mon, 30 Jun 2003 22:28:15 +1000
"Rudi Starcevic" <rudi@oasis.net.au> wrote:

> SELECT 1111 & 111 = 71
> I was expecting the second example to be 
> SELECT 1111 & 111 = 111

hmm ..:
let's see:
dec(1111) is bin(10001010111)
dec(111)  is bin(00001101111)

so, when we'll "AND" them:
1111 :  10001010111 
111  :  00001101111 
-------------------  
        00001000111 : dec: 71 

quite reasonable, isn't it?

depesz

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