[Xapian-discuss] Re: Re: Is there any way to modify the value ofdocumentsaved ago?

[Alexander Lind]

I agree, if there is any way to implement an ultrafast updating method 
in Xapian, that would be most useful.

Alec

Sungsoo Kim wrote:
> Thank you for your kind reply!
>
> I need the same function as Hightman asked.
>
> In general RDBMS we can change values in a certain field very easily
> and get query results sort by the field.
>
> Xapian's value can be thought as field of RDBMS, even thought not 
> exactly same, and can be used to sort the search result.
>
> Therefore I also ask this requirement can be considered in the future 
> release. It will be very useful to Xapian users.
>
>
>
> Sungsoo Kim
>
>
>
> "James Aylett" <james-xapian at tartarus.org> wrote in message news:20070809093815.GB29333 at tartarus.org...
> *Please* keep discussions on-list. There are many more people who can
> help, that way, and the discussion is archived for use by future users.
>
> On Thu, Aug 09, 2007 at 08:35:47AM +0800, Hightman(马明练) wrote:
>
>   
>> Actually, these values will be updated are all have a static length,
>> and I can get the document id by the unique indexed term
>> (Xapian::Database::postlist_begin) .  So if we can get the real
>> offset for these values in the database file, update these values
>> will be possible and simple.
>>     
>
> It isn't a flat file though - it's a btree on disk. You might be able
> to use the internal flint library to access and update things, but no
> one's ever tried this to my knowledge. We don't install the header
> files, so you'll have to hack around a bit to get this to work - and
> if we change the database format in future, or the internal API,
> you'll have to redo your work. However if you need the greater speed,
> this may be the only solution.
>
> J
>
>   
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