Hi there, I'm a bit struggling with the syntax for filter function, after it changed from Oct2014 to Jul2015. I have looked at the release notes, but they don't seem to even mention this change of syntax. This used to work in Oct2014: create filter function maxlevenshtein(s1 string, s2 string, k int) external name str."distjoin_levenshtein"; select t.name, f.name from sys.tables t, sys.functions f where t.name maxlevenshtein(2) f.name; In Jul2015, if I look at Niels' comment in https://www.monetdb.org/bugzilla/show_bug.cgi?id=3702 , it should be something similar to select t.name, f.name from sys.tables t, sys.functions f where [t.name] maxlevenshtein [f.name, 2]; But this is still not right. How should it be? And should I change the SQL / MAL / C interface of the function as well? Thanks,