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https://issues.apache.org/jira/browse/SOLR-2136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13048642#comment-13048642
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Koji Sekiguchi commented on SOLR-2136:
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I've met a strange behavior. With empty index, start example solr. Then hit:
http://localhost:8983/solr/select/?q={!func}if(exists(f1_b),10,20)&debug=results
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.ValueSourceParser$60$1 cannot be cast to
org.apache.solr.search.function.SingleFunction
at
org.apache.solr.search.function.SimpleBoolFunction.equals(SimpleBoolFunction.java:66)
at
org.apache.solr.search.function.IfFunction.equals(IfFunction.java:137)
at
org.apache.solr.search.function.FunctionQuery.equals(FunctionQuery.java:202)
at org.apache.solr.search.QueryResultKey.equals(QueryResultKey.java:78)
at java.util.HashMap.getEntry(HashMap.java:349)
at java.util.LinkedHashMap.get(LinkedHashMap.java:280)
at org.apache.solr.search.LRUCache.get(LRUCache.java:129)
at
org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:991)
at
org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:346)
at
org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:441)
at
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:239)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1308)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:353)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:248)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java: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 Høydahl
> 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 logical
> value (TRUE or FALSE).
> value1 is the value that is returned by the function if test yields TRUE.
> value2 is the value that is returned by the function if test yields FALSE.
> 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=="red"; 100; if(color=="green"; 50; 25))
> This function will check the document field "color", and if it is "red"
> return 100, if it is "green" return 50, else return 25.
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