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https://issues.apache.org/jira/browse/SOLR-8237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexandre Rafalovitch resolved SOLR-8237.
-----------------------------------------
Resolution: Implemented
> Invalid parsing with solr edismax operators
> -------------------------------------------
>
> Key: SOLR-8237
> URL: https://issues.apache.org/jira/browse/SOLR-8237
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 4.8.1
> Environment: Windows 2008 R2 - Apache TomCat 7
> Reporter: Mahmoud Almokadem
> Priority: Critical
> Labels: edismax
>
> Using edismax as the parser we got the undesirable parsed queries and
> results. The following is two different cases with strange behavior:
> Searching with these parameters
> "mm":"2",
> "df":"TotalField",
> "debug":"true",
> "indent":"true",
> "fl":"Title",
> "start":"0",
> "q.op":"AND",
> "fq":"",
> "rows":"10",
> "wt":"json"
> and the query is
> "q":"+(public libraries)",
> Retrieve 502 documents with these parsed query
> "rawquerystring":"+(public libraries)",
> "querystring":"+(public libraries)",
> "parsedquery":"(+(+(DisjunctionMaxQuery((Title:public^200.0 |
> TotalField:public^0.1)) DisjunctionMaxQuery((Title:libraries^200.0 |
> TotalField:libraries^0.1)))))/no_coord",
> "parsedquery_toString":"+(+((Title:public^200.0 | TotalField:public^0.1)
> (Title:libraries^200.0 | TotalField:libraries^0.1)))"
> and if the query is
> "q":" (public libraries) "
> then it retrieves 8 documents with these parsed query
> "rawquerystring":" (public libraries) ",
> "querystring":" (public libraries) ",
> "parsedquery":"(+((DisjunctionMaxQuery((Title:public^200.0 |
> TotalField:public^0.1)) DisjunctionMaxQuery((Title:libraries^200.0 |
> TotalField:libraries^0.1)))~2))/no_coord",
> "parsedquery_toString":"+(((Title:public^200.0 | TotalField:public^0.1)
> (Title:libraries^200.0 | TotalField:libraries^0.1))~2)"
> So the results of adding "+" to get all tokens before the parenthesis
> retrieve more results than removing it.
> Request Handler
> <requestHandler name="/select" class="solr.SearchHandler">
> <lst name="defaults”>
> <str name="echoParams">explicit</str>
> <int name="rows">10</int>
> <str name="df">TotalField</str>
> <str name="q.op">AND</str>
> <str name="defType">edismax</str>
> <str name="qf">Title^200 TotalField^1</str>
> </lst>
> </requestHandler>
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