Mahmoud Almokadem created SOLR-8237:
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Summary: 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
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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