Sort by function

["Asherman, Doug" <do...@cbs.com>]

Hello:

I¹ve been reading through the docs trying to find a way to sort by a dynamic
value; preferably I¹d like to place a function into the configuration.
Something like:

Value=sum(sum(f1,f2,f3),sum(pow(x,4),f1))


The closest thing I can find is the ³sort by function², which doesn¹t seem
to be available in 1.4. If such a thing is possible in 1.4, could someone
point me to the pertinent part of the docs?

Thanks.

Re: Sort by function

[Chris Hostetter <ho...@fucit.org>]

: Value=sum(sum(f1,f2,f3),sum(pow(x,4),f1))

: The closest thing I can find is the �sort by function�, which doesn�t seem
: to be available in 1.4. If such a thing is possible in 1.4, could someone

Hey doug: I think i was mistaken the last time we talked.

As you've discovered (and as Koji verified) Sort by function is not 
available in Solr 1.4.

What you can do however (w/o applying any patches) is query on a function 
so that the function result is used as the score, and then use filter 
queries to constrain the resulting documents.  for simple "i need to sort 
by a function" purposes this works fine, what it can't deal with (cleanly) 
is "i want to sort by a field desc, and then i want a secondary sort on a 
funcA() asc, and then a tertiary sort on funcB() desc, ..."

ie...

q={!func}sum(sum(f1,f2,f3),sum(pow(x,4),f1))&fq=your+query&sort=score+desc


PS...

http://people.apache.org/~hossman/#solr-user


-Hoss

Re: Sort by function

[Koji Sekiguchi <ko...@r.email.ne.jp>]

(10/05/06 7:53), Asherman, Doug wrote:
> Hello:
>
> I've been reading through the docs trying to find a way to sort by a 
> dynamic value; preferably I'd like to place a function into the 
> configuration.  Something like:
>
> Value=sum(sum(f1,f2,f3),sum(pow(x,4),f1))
>
>
> The closest thing I can find is the "sort by function", which doesn't 
> seem to be available in 1.4. If such a thing is possible in 1.4, could 
> someone point me to the pertinent part of the docs?
>
> Thanks. 
Sort by Function ia available in branch_3x. Here is the patch:

https://issues.apache.org/jira/browse/SOLR-1297

Koji

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