From: Rudi Starcevic <rudi@oasis.net.au>
Cc: pgsql-sql@postgresql.org
Subject: Re: Bitwise operation
Date: Tue, 01 Jul 2003 09:48:01 +1000
Message-ID: <3F00CC31.3030200@oasis.net.au> (raw)
In-Reply-To: <20030630124249.GB26142@wolff.to>
References: <20030630122815.M76087@oasis.net.au>
<20030630124249.GB26142@wolff.to>
Bruno,Hubert,
Thanks.
It's all crystal clear now.
Now I can keep moving on with my app.
If all goes well I hope to add a 'techdoc' on how to do this.
I've found documents from other DBMS on using Bitwise operations
but not PG.
Cheers
Rudi.
Bruno Wolff III wrote:
>On Mon, Jun 30, 2003 at 22:28:15 +1000,
> Rudi Starcevic <rudi@oasis.net.au> wrote:
>
>
>>Hi,
>>
>>I'm learning to use Postgresql's bitwise operator's as I'm interested
>>in building super fast search's based on user selections in web forms.
>>
>>So far so good but I have just lost it a little so I thought I'd post.
>>Please growl at me if I'm asking on the wrong list :-)
>>
>>I understand this:
>>
>>SELECT 111 & 11 = 11
>>
>>but not this
>>
>>SELECT 1111 & 111 = 71
>>
>>I was expecting the second example to be
>>
>>SELECT 1111 & 111 = 111
>>
>>
>
>In the above examples the numbers are decimal values.
>
>Maybe you wanted to do something like the following:
>
>area=> select b'1111' & b'0111';
> ?column?
>----------
> 0111
>(1 row)
>
>---------------------------(end of broadcast)---------------------------
>TIP 4: Don't 'kill -9' the postmaster
>
>
>
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Subject: Re: Bitwise operation
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