A simple question based on the same problem discussed in the "Solr Grouping and empty fields" topic.
It would seem that using group.func=if(exists(groupField),groupField,uuidField) would allow us to only group documents when we know the group field value, and solve the issue given in the above topic. However, it only works if groupField and uuidField are both numeric. If they are strings (like in my application) I get an unsupported operation error. If I use group.func=groupField then everything works, even though groupField is a string type. Is there a reason that the IF function assumes that what it returns is a number? I am considering trying to just change the implementation of IF so I can make this work, but I am rather new to Solr so I wanted see what I might be missing. Thanks! - Scott For completeness: - I can't use the solution mentioned earlier because I would have to create hundreds of needless copy fields. - A full query string example is: q=*%3A*&group=true&group.facet=true&group.func=if(exists(groupField),groupField,uuidField)&rows=10&wt=xml - I am using Solr 4.0.0 -- View this message in context: http://lucene.472066.n3.nabble.com/Using-String-Values-in-Solr-Query-Functions-tp4047108.html Sent from the Solr - User mailing list archive at Nabble.com.
