[Bizgres-general] Re: Bitmap Index on-disk format documentation

Mark Kirkwood markir at paradise.net.nz
Tue Feb 14 04:15:17 GMT 2006


Mark Kirkwood wrote:
> Mark Kirkwood wrote:
> 
>> It has been a quiet week here, so I thought I would have a go at 
>> documenting the on-disk format for the new bitmap indexes:
>>
>> http://www.homepages.paradise.net.nz/markir/bitmap/
>>
>> The section entitled 'Data Structures' is a bit clumsy, (work in 
>> progress - suggestion welcome). I have also included a simple worked 
>> example that reads a bitmap index directly. Enjoy.
>>
>> For anyone that wants to play, the SGML source is at:
>>
>> http://www.homepages.paradise.net.nz/markir/download/bitmap-doc.tar.gz
>>
> 
> I've updated these docs to reflect the changes in the 01-15 patch - 
> specifically 8-bit words and a mapping function based on calculating 
> MaxNumTuples per page.
> 
>

For the hordes of you reading this :-) - I've altered the sgml to be a 
"book" as it seems to look better. Some leftover bits from wordsize = 32 
are also fixed.


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