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https://issues.apache.org/jira/browse/SOLR-2996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589375#comment-13589375
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Alan Woodward commented on SOLR-2996:
-------------------------------------
I've had a quick look, and I think it's just a matter of changing the Clause()
definition in QueryParser.jj. (Warning: untested patch)
{{
Index: solr/core/src/java/org/apache/solr/parser/QueryParser.jj
===================================================================
--- solr/core/src/java/org/apache/solr/parser/QueryParser.jj (revision
1451143)
+++ solr/core/src/java/org/apache/solr/parser/QueryParser.jj (working copy)
@@ -195,7 +195,8 @@
(
- q=Term(field)
+ <STAR> {q=handleBareTokenQuery("*", "*", fuzzySlop, prefix, true, fuzzy,
regexp)}
+ | q=Term(field)
| <LPAREN> q=Query(field) <RPAREN> (<CARAT> boost=<NUMBER>)?
| (localParams = <LPARAMS> (<CARAT> boost=<NUMBER>)? {
q=getLocalParams(field, localParams.image); } )
)
}}
I don't have time to look at this properly now, but I'll probably get a chance
next week. Feel free to try out that patch though!
> make "q=*" not suck in the lucene and edismax parsers
> -----------------------------------------------------
>
> Key: SOLR-2996
> URL: https://issues.apache.org/jira/browse/SOLR-2996
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Reporter: Hoss Man
>
> More then a few users have gotten burned by thinking that "{{\*}}" is the
> appropriate syntax for "match all docs" when what it really does (unless i'm
> mistaken) is create a prefix query on the default search field using a blank
> string as the prefix.
> since it seems very unlikely that anyone has a genuine usecase for making a
> prefix query with a blank prefix, we should change the default behavior of
> the LuceneQParser and EDismaxQParsers (and any other Qparsers that respect
> {{\*:\*}} if i'm forgetting them) to treat this situation the same as
> {{\*:\*}}. we can offer a (local)param to force the old behavior if someone
> really wants it.
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