[Monetdb-developers] Simple bat operations

Niels Nes Niels.Nes at cwi.nl
Thu Oct 11 09:38:10 CEST 2007


On Thu, Oct 11, 2007 at 08:00:36AM +0200, darabi at web.de wrote:
> Hello,
> 
> sorry for asking so many dumb questions, but I don't seem
> to be able to find the answers in the docs.
> 
> I try to create and persist a bat:
> 
> (mclient -d demo -l mal)
> 
> n := bat.new(:oid,:str);
> bat.setName(n, "person_name");
> bat.setPersistent(n, true);
> 
> bat.append(n, "John", true);
> bat.append(n, "James", true);
> 

replace this save
> bat.save(n);
by

transaction.commit();

Niels

(ps later you probably want to switch to subcommit, ie only commit those
bat that changed, for this see the documenation in the transaction module
(src/modules/mal/transaction.mx)
> 
> But this doesn't seem to be sufficient.
> 
> Or at least I then don't know how to load this bat the next
> time I start mclient.
> 
> Is there a file (one of the tests or sth.) which contains
> such basic tests? I tried to find-grep over them, but didn't
> succeed in finding what I was looking for.
> 
> 
> Thanks you for your patience.
> 
> 
> Kambiz
> 
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-- 

Niels Nes, Centre for Mathematics and Computer Science (CWI)
Kruislaan 413, 1098 SJ Amsterdam, The Netherlands
room C0.02,  phone ++31 20 592-4098, fax ++31 20 592-4312
url: http://www.cwi.nl/~niels   e-mail: Niels.Nes at cwi.nl




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