Re: BUG #8191: Wrong bit conversion

From: Gavin Flower <GavinFlower(at)archidevsys(dot)co(dot)nz>
To: John R Pierce <pierce(at)hogranch(dot)com>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #8191: Wrong bit conversion
Date: 2013-06-01 01:01:05
Message-ID: 51A947D1.50205@archidevsys.co.nz
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On 01/06/13 12:29, John R Pierce wrote:
> On 5/31/2013 4:29 PM, Gerald Luger wrote:
>> Shouldn't I expect all results to be 000...0001?
>>
>> Otherwise it would be
>> 1 != 1?
>
> SQL's BIT type is big endian, a hangover from its IBM mainframe heritage.
>
>
>
>
>
I don't think it has anything to do with byte sex (I know of 3 ways to
store integers in memory, and I suspect there are more !).

Don't confuse how things are displayed with how they are stored in memory.

Just that
1 = two to the power of zero
so it seems logical to start numbering the bits to represent the powers
of 2.

Cheers,
Gavin

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