Dismax Wiki page

[Erick Erickson <er...@gmail.com>]

I was looking at a question on the users list, and there are a couple of
issues...

I'm running 1.4.1 on a Windows box. Trying to specify dismax via
defType=dismax fails, returning 0 results and doesn't look like it hits the
dismax handler at all, at least the parsed query comes back with +() +()
with debugQuery=on.

deftype=dismax is fine. qt=dismax is also fine.

The Wiki page has qt=defType=dismax in one of the examples (
http://wiki.apache.org/solr/DisMaxQParserPlugin). and the rest of the
examples have defType.

Before I fix the Wiki page, what's the preferred syntax? I thought it was
def[T|t]ype.... And is the capitalization thing really a problem or not?

Thanks
Erick

Re: Dismax Wiki page

[Erick Erickson <er...@gmail.com>]

Ahhh, thanks, that clears up some things for me...

Erick

On Mon, Nov 22, 2010 at 5:46 PM, Chris Hostetter
<ho...@fucit.org>wrote:

>
> : I'm running 1.4.1 on a Windows box. Trying to specify dismax via
> : defType=dismax fails, returning 0 results and doesn't look like it hits
> the
> : dismax handler at all, at least the parsed query comes back with +() +()
> : with debugQuery=on.
>
> that parsed query looks like it would have come from dismax if you have no
> "qf" configured.  you cna be certain by using debugQuery=true and looking
> for "QParser" in the debug section.  9that works in solr 1.4.1)
>
> : deftype=dismax is fine. qt=dismax is also fine.
>
> deftype=dismax isn't going to do anything - you'll get the default
> qparser.
>
> qt=dismax is going to change the handler used, so if that works but
> defType=dismax doesn't, that just means that the requestHandler named
> "dismax" has some default params that make the dismax QParser work with
> your schema, but the 'default' requestHandler does not.
>
> : The Wiki page has qt=defType=dismax in one of the examples (
>
> that's a typo ... i fixed it.
>
> : Before I fix the Wiki page, what's the preferred syntax? I thought it was
> : def[T|t]ype.... And is the capitalization thing really a problem or not?
>
> like all solr params, defType is case sensative.
>
> qt vs defType is not a question of "prefrence" is a question of purpose.
> "qt" picks hte requestHandler instance.  "defType" tells that
> requestHandler what you want the default QParser to be for the "q" param.
>
>
> -Hoss
>
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Re: Dismax Wiki page

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

: I'm running 1.4.1 on a Windows box. Trying to specify dismax via
: defType=dismax fails, returning 0 results and doesn't look like it hits the
: dismax handler at all, at least the parsed query comes back with +() +()
: with debugQuery=on.

that parsed query looks like it would have come from dismax if you have no 
"qf" configured.  you cna be certain by using debugQuery=true and looking 
for "QParser" in the debug section.  9that works in solr 1.4.1)

: deftype=dismax is fine. qt=dismax is also fine.

deftype=dismax isn't going to do anything - you'll get the default 
qparser.

qt=dismax is going to change the handler used, so if that works but 
defType=dismax doesn't, that just means that the requestHandler named 
"dismax" has some default params that make the dismax QParser work with 
your schema, but the 'default' requestHandler does not.

: The Wiki page has qt=defType=dismax in one of the examples (

that's a typo ... i fixed it.

: Before I fix the Wiki page, what's the preferred syntax? I thought it was
: def[T|t]ype.... And is the capitalization thing really a problem or not?

like all solr params, defType is case sensative.

qt vs defType is not a question of "prefrence" is a question of purpose. 
"qt" picks hte requestHandler instance.  "defType" tells that 
requestHandler what you want the default QParser to be for the "q" param.


-Hoss

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