It appears that any attempt to sort a search on a date column fails. The two date columns that can be searched on are publication date and acquisition date. Video: http://screencast.com/t/yaRfaqA7mW2r I've also reproduced this on master.
Hi Kyle, might be good to check - does it behave the same with and without QueryParser?
I could reproduce the problem in advanced (advanced search ind staff client) with 3.16.02 and with current master. The Bug occurs not only with sorting after dates. I had it. e.g. after serching for publication year 2013 and sorting after Author. Set to P3 major because parts of search functionality is broken. During the tests, I had following URLs: 1) Staff client, advanced search, search for publication year 2013 /cgi-bin/koha/catalogue/search.pl?idx=yr&q=2013&idx=kw&idx=kw&sort_by=relevance 2) Sort result by publication year results in following URL /cgi-bin/koha/catalogue/search.pl?idx=yr%252Cst-numeric&q=2013&sort_by=pubdate_dsc Result: Empty 3) I changed the URL to: /cgi-bin/koha/catalogue/search.pl?idx=yr&idx=st-numeric&q=2013&sort_by=pubdate_dsc Result: List displays as expected. The part %252C seems to be the result of some double-encoding, could be %252c = %2C = a comma (,) (following http://stackoverflow.com/questions/8348197 ) Replacing %252c with a comma resulted in an empty list. I then repaced it with &idx= and had the expected result.
This seems to be fixed.