[Xapian-discuss] STEM_SOME and prefixes.. (even boolean)

[Jesper Krogh]

Matthew Somerville wrote:
> Jesper Krogh wrote:
>> I have acc listed as a boolean prefix.
> 
> Do you mean you have something like:
>     $queryparser->add_boolean_prefix('acc', 'Q');
> or something else?
> 
>> I have some terms like Q1W2E3 that is listed as boolean prefixes.
> 
> Do you mean you have a document in your database that has Q1W2E3 as a 
> term? I'm guessing not because of what you say below, so what is the 
> term you have entered in the database for the ID "Q1W2E3"?
> 
>  > This is essential ID's.. so I really dont want the stemming algorithm to
>> accidentally stumble over them. But then if the id happens to be start 
>> with an
>> upper-case letter it gets fed to the search like this:
>> Search:
>> acc:Q1W2E3
>>
>> Running query 'Xapian::Query(0 * ACC:Q1W2E3)'
> 
> This doesn't sound like a stemming issue (though I could be wrong :) ). 
> If I have "acc" as a boolean prefix here with the above queryparser 
> line, a query for acc:Q1W2E3 to QueryParser becomes:
>     Xapian::Query(0 * QQ1W2E3)
> and if I don't have "acc" as a boolean prefix, it becomes:
>     Xapian::Query((acc:(pos=1) PHRASE 2 q1w2e3:(pos=2)))
> ie. it's treated as a phrase search.

I have both behaviors if I put in q1w2e3 instead of Q1W2E3, that was
why i thought it was related to the stemming.

> Do you have some short example code that exhibits the issue?

Have you set stemming strategy to STEM_SOME?

Jesper

-- 
Jesper