[Monetdb-developers] MonetDB::CLI: MapiLib alternatives

Sjoerd Mullender sjoerd at acm.org
Mon Sep 5 17:45:33 CEST 2005


Steffen Goeldner wrote:
> I'd like to add a more perlish layer around MapiLib (working title:
> MonetDB::CLI). This may look like:
> 
>   my $Cxn = MonetDB::CLI->connect( ... );
>   my $Req = $Cxn->query('select * from env');
>   while ( my $Cnt = $Req->fetch_row ) {
>     print $Req->fetch_field( $_ ) for 0 .. $Cnt-1;
>   }
> 
> Still much in the spirit of Mapi, but handles are now objects (with
> destructors), functions are methods and the methods can throw exceptions.
> Once we have such an interface, additional implementations are possible.
> For instance, a XS module could skip the MapiLib layer and use libMapi
> directly. Later on, an implementation for MCL will be added (I hope) -
> either in pure perl or on top of libMCL (in case such a library will
> emerge).
> Of course, I'd like to use this new interface from DBD::monetdb to be
> able to choose between various implementations and to ease the
> transition to MCL.
> On the downside: additional modules means additional installation efforts.
> Especially the people resposible for the RPM's will be affected.
> If this sounds too screwy, it's now the chance to stop me ;-)

Sounds a bit like the CMapi module in the src/mapi/clients/python/Cimpl
directory.  In other words, we already have something similar for
Python, so no reason to not also do it for Perl.

-- 
Sjoerd Mullender
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