[MonetDB-users] CREATE AGGREGATE error

Hello, I am trying to define an aggregate function as I have seen in an old message in this list: http://sourceforge.net/mailarchive/message.php?msg_id=20582949 I am trying to define it as: CREATE AGGREGATE group_concat (BASETYPE = text, SFUNC = _group_concat, STYPE = text); And I get this error: 42000!syntax error, unexpected '=' in: "create aggregate group_concat (basetype =" Any ideas on what I'm doing wrong? I have already defined the _group_concat function as described in the same message mentioned earlier. Running MonetDB v11.9.5 (Apr2012-SP1) on Linux. thank you, Asterios