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Date: Mon, 13 Jun 2011 16:41:51 +0000 (UTC)
From: "Koji Sekiguchi (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: 
 <871070844.3025.1307983311914.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (SOLR-2136) Function Queries: if() function
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    [ https://issues.apache.org/jira/browse/SOLR-2136?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D13048=
642#comment-13048642 ]=20

Koji Sekiguchi commented on SOLR-2136:
--------------------------------------

I've met a strange behavior. With empty index, start example solr. Then hit=
:

http://localhost:8983/solr/select/?q=3D{!func}if(exists(f1_b),10,20)&debug=
=3Dresults

you got an empty xml as expected. Then hit the above URL again, you got the=
 following exception:

{code}
SEVERE: java.lang.ClassCastException: org.apache.solr.search.ValueSourcePar=
ser$60$1 cannot be cast to org.apache.solr.search.function.SingleFunction
=09at org.apache.solr.search.function.SimpleBoolFunction.equals(SimpleBoolF=
unction.java:66)
=09at org.apache.solr.search.function.IfFunction.equals(IfFunction.java:137=
)
=09at org.apache.solr.search.function.FunctionQuery.equals(FunctionQuery.ja=
va:202)
=09at org.apache.solr.search.QueryResultKey.equals(QueryResultKey.java:78)
=09at java.util.HashMap.getEntry(HashMap.java:349)
=09at java.util.LinkedHashMap.get(LinkedHashMap.java:280)
=09at org.apache.solr.search.LRUCache.get(LRUCache.java:129)
=09at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearche=
r.java:991)
=09at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.jav=
a:346)
=09at org.apache.solr.handler.component.QueryComponent.process(QueryCompone=
nt.java:441)
=09at org.apache.solr.handler.component.SearchHandler.handleRequestBody(Sea=
rchHandler.java:239)
=09at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandl=
erBase.java:129)
=09at org.apache.solr.core.SolrCore.execute(SolrCore.java:1308)
=09at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter=
.java:353)
=09at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilte=
r.java:248)
=09at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet=
Handler.java:1212)
=09at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3=
99)
=09at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.jav=
a:216)
=09at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:1=
82)
=09at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:7=
66)
=09at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
=09at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHand=
lerCollection.java:230)
=09at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.=
java:114)
=09at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1=
52)
=09at org.mortbay.jetty.Server.handle(Server.java:326)
=09at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:54=
2)
=09at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpCo=
nnection.java:928)
=09at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
=09at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
=09at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
=09at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.=
java:228)
=09at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.j=
ava:582)
{code}


> Function Queries: if() function
> -------------------------------
>
>                 Key: SOLR-2136
>                 URL: https://issues.apache.org/jira/browse/SOLR-2136
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 1.4.1
>            Reporter: Jan H=C3=B8ydahl
>             Fix For: 4.0
>
>         Attachments: SOLR-2136.patch, SOLR-2136.patch
>
>
> Add an if() function which will enable conditional function queries.
> The function could be modeled after a spreadsheet if function (e.g: http:=
//wiki.services.openoffice.org/wiki/Documentation/How_Tos/Calc:_IF_function=
)
> IF(test; value1; value2) where:
>     test is or refers to a logical value or expression that returns a log=
ical value (TRUE or FALSE).
>     value1 is the value that is returned by the function if test yields T=
RUE.
>     value2 is the value that is returned by the function if test yields F=
ALSE.
> If value2 is omitted it is assumed to be FALSE; if value1 is also omitted=
 it is assumed to be TRUE.
> Example use:
> if(color=3D=3D"red"; 100; if(color=3D=3D"green"; 50; 25))
> This function will check the document field "color", and if it is "red" r=
eturn 100, if it is "green" return 50, else return 25.

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