CANNOT use a * or ? symbol as the first character of a search.

[liujb <li...@ufida.com.cn>]

oh,my god,

Query Parser Syntax 

CANNOT use a * or ? symbol as the first character of a search.

that's mean I can't wrinte a search string like '*test'. this will be cause a great restriction to use lucence.
but ,that's a really a important search scene.

can you give me some advice on this problem.

tks.


owind.

Re: CANNOT use a * or ? symbol as the first character of a search.

[Shashi Kant <sk...@sloan.mit.edu>]

You can enable that by

QueryParser.setAllowLeadingWildcard( true )


On Mon, Dec 28, 2009 at 2:46 AM, liujb <li...@ufida.com.cn> wrote:
>
> oh,my god,
>
> Query Parser Syntax
>
> CANNOT use a * or ? symbol as the first character of a search.
>
> that's mean I can't wrinte a search string like '*test'. this will be cause a great restriction to use lucence.
> but ,that's a really a important search scene.
>
> can you give me some advice on this problem.
>
> tks.
>
>
> owind.

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Re: CANNOT use a * or ? symbol as the first character of a search.

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

: References: <4B...@gmail.com>
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: Subject: CANNOT use a * or ? symbol as the first character of a search.

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Re: CANNOT use a * or ? symbol as the first character of a search.

[Anshum <an...@gmail.com>]

Hi,
Don't worry! there always are ways!
Is prefix query is what you are trying to run? They would run but would be
highly unoptimized as lucene stores terms in a lexically sorted manner in
its index. <term>* like query terms are allowed by the parser/searcher
though.
Possible solution for this would be:
Index flipped terms (using an appropriate analyzer) i.e. cat is also indexed
as tac. You may then query on ta* instead of at*.
Does that solve your issues/concern?

--
Anshum Gupta
Naukri Labs!
http://ai-cafe.blogspot.com

The facts expressed here belong to everybody, the opinions to me. The
distinction is yours to draw............


On Mon, Dec 28, 2009 at 1:16 PM, liujb <li...@ufida.com.cn> wrote:

> oh,my god,
>
> Query Parser Syntax
>
> CANNOT use a * or ? symbol as the first character of a search.
>
> that's mean I can't wrinte a search string like '*test'. this will be cause
> a great restriction to use lucence.
> but ,that's a really a important search scene.
>
> can you give me some advice on this problem.
>
> tks.
>
>
> owind.
>