make "q=*" not suck in the lucene and edismax parsers
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Key: SOLR-2996
URL: https://issues.apache.org/jira/browse/SOLR-2996
Project: Solr
Issue Type: Improvement
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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