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From "Steve Rowe (JIRA)" <>
Subject [jira] [Commented] (LUCENE-2605) queryparser parses on whitespace
Date Fri, 30 Sep 2016 19:16:21 GMT


Steve Rowe commented on LUCENE-2605:

Hi [~dionoid]

bq. Reading the discussion above, it seems that splitting on whitespace is disabled by default

No, that's wrong - from the commit messages (which you can see in comments on this issue above):

bq. Default behavior remains unchanged: split-on-whitespace=true

In Lucene 7.0, though, the default before will switch to split-on-whitespace=false

How can I test if this works?
Any example configuration would be very helpful!

Have you tried setting [{{setSplitOnWhitespace(false)}}|]
on the query parser before using it?

> queryparser parses on whitespace
> --------------------------------
>                 Key: LUCENE-2605
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/queryparser
>            Reporter: Robert Muir
>            Assignee: Steve Rowe
>             Fix For: 6.2
>         Attachments: LUCENE-2605-dont-split-by-default.patch, LUCENE-2605.patch, LUCENE-2605.patch,
LUCENE-2605.patch, LUCENE-2605.patch, LUCENE-2605.patch, LUCENE-2605.patch
> The queryparser parses input on whitespace, and sends each whitespace separated term
to its own independent token stream.
> This breaks the following at query-time, because they can't see across whitespace boundaries:
> * n-gram analysis
> * shingles 
> * synonyms (especially multi-word for whitespace-separated languages)
> * languages where a 'word' can contain whitespace (e.g. vietnamese)
> Its also rather unexpected, as users think their charfilters/tokenizers/tokenfilters
will do the same thing at index and querytime, but
> in many cases they can't. Instead, preferably the queryparser would parse around only
real 'operators'.

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