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https://issues.apache.org/jira/browse/SOLR-8237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16430017#comment-16430017
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Erick Erickson commented on SOLR-8237:
--------------------------------------

Can this be closed? There's been a lot of changes since this was opened.

> 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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