: I have two fields TOWN and POSTALCODE and I want to concat those two in one : field to do faceting
As others have pointed out, copy field doesn't do a "concat", it just adds the field values from the source field to the desc field (so with those two <copyField/> lines you will typically get two values for each doc in the dest field) if you don't wnat to go the DIH route, and you don't want to change your talend process, you could use a simple UpdateProcessor for this (update processors are used to process add/delete requests no matter what source the come from, before analysis happens) ... but i don't think we have any off the shelf "Concat" update processors in solr at the moment there is a patch for a a Script based on which might be helpful.. https://issues.apache.org/jira/browse/SOLR-1725 All of that said, based on what you've described about your usecase i would question from a UI standpoint wether this field would actually a good idea... isn't there an extremely large number of postal codes even in a single city? why not let people fact on just the town field first, and then only when they click on one, offer them a facet on Postal code? Otherwise your facet UI is going to have a tendenzy to look like this... Gender: * Male (9000 results) * Female (8000 results) Town/Postal: * paris, 75016 (560 results) * paris, 75015 (490 results) * paris, 75022 (487 results) * boulogne sur mer 62200 (468 results) * paris, 75018 (465 results) * (click to see more) Color: * Red (900 results) * Blue (800 results) ...and many of your users will never find the town they are looking for (let alone the post code) -Hoss
