Sorry, I had sent out this mail, before I received Martin's mail with the clarifying information:
If you would have packaged both instructions in a function, it would work as expected, because io.print can handle any BAT thanks for being a 'pattern'
Thank you
Kambiz
----- Original Message -----
From: darabi@web.de
To: monetdb-developers@lists.sourceforge.net
Cc: "Martin Kersten"
A more informative error mesage might help --- from a user's point of view, variable 'b' has been initialized before it is used.
I would second that.
In fact, the above b:bat[:int,:int] := bbp.bind("test"); is wrong --- or at least implies a silent cast from :oid to :int of the BAT's head --- since bind returns a bat[:oid,:any_1], i.e., only the tail type is "unknown" or "generic".
The type system seems to think that b is b:any and not b:bat[:any_1,:any_2]. When I do this: mal>n := bat.new(:void,:str); mal>bat.setName(n, "person_name"); mal>bat.setPersistent(n, true); mal>transaction.commit(); mal>\q then come back to bind person_name like this: mal>pn := bbp.bind("person_name"); mal>i := bat.info(pn); MAPI = monetdb@localhost:50000 QUERY = i := bat.info(pn); ERROR = !TypeException:user.main[1]:'bat.info' undefined in: i:any := bat.info(pn:any) !TypeException:user.main[1]:'pn' may not be used before being initialized the first error message sounds like the 'function dispatch mechanism' (whatever that might be) was searching for a function bat.info(pn:any) and didn't find it. Looking into the code, I see something which could possibly match in function typeChecker (MonetDB5-server/MonetDB5/src/mal/mal_resolve.mx line 644). So, bbp.bind(:str) didn't assign a bat to pn? Is there a way in mal to output the type of a variable? Thanks Kambiz ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Monetdb-developers mailing list Monetdb-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/monetdb-developers