Hi again,
Thanks for everyone who replied. The PerFieldAnalyzerWrapper was a good
suggestion, and one I had overlooked, but for our particular
requirements it wouldn't quite work so I went with overriding
getFieldQuery().
You were right, Paul. In 1.4.2 a whole heap of QueryParser changes were
made, mostly removing the analyzer parameter from methods.
In the end I built my changes on top of the NewMultiFieldQueryParser
which was shared here recently and works wonders -- thanks Bill Janssen
and sergiu gordea. I added support for slops and boosts to build
together with the multi-fields array, and then overrode getFieldQuery to
check the queryText for a start char ("=" for example) and if found
remove it and switch to a non-tokenising analyser.
Then I found that because that analyser always returns a single token
(TermQuery) it would send through spaces into the final query string,
causing problems. So also in getFieldQuery I check if it needs breaking
up and converting into a PhraseQuery.
Seems to work, just needs thorough testing. If anyone would like a copy
I could post it up here.
Regards, --Leto
(excuse the disclaimer...)
> We have the need for analysed and 'not analysed/not tokenised' clauses
> within one query. Imagine an unparsed query like:
>
> +title:"Hello World" +path:Resources\Live\1
>
> In the above example we would want the first clause to use
> StandardAnalyser and the second to use an analyser which returns the
> term as a single token. So a parsed result might look like:
>
> +(title:hello title:world) +path:Resources\Live\1
>
> Would anyone have any suggestions on how this could be done? I was
> thinking maybe the QueryParser would have to be changed/extended to
> accept a separator other than colon ":", something like "=" for
> example to indicate this clause is not to be tokenised. Or perhaps
> this can all be done using a single analyser?
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