Re: What Would You Like To Do?

On Tue, 2011-09-13 at 17:02 -0300, Rodrigo Gonzalez wrote:
> On 09/13/2011 04:52 PM, Tom Lane wrote:
> > Rodrigo Gonzalez<rjgonzale@estrads.com.ar>  writes:
> >>> In a perfect world, it would be nice if one could do combined queries
> >>> linking a PostgreSQL database with an Oracle one, or a MySQL one,
> >> Can't you do that with FDW that is present in 9.1?
> > FDW provides the structure within which that will eventually be
> > possible, but there's no Oracle or MySQL wrapper today ... and there are
> > a lot of FDW restrictions that need to be worked on, too.
> >
> >             regards, tom lane
> >
> They are both listed at wiki
> I know there are a lot of limitations....but OP message says "Even 
> something that is several hundred times slower is going to be faster 
> than merging the databases together.  When I do this today, I have to 
> write a program (in perl or php) that accesses both databases and merges 
> it by hand."
> Am I wrong that this is currently possible using FDW?

Yes, to some extent.

And before FDW it was also possible (to some extent) using pl/python or
pl/perl to turn remote tables into set returning functions (and if
really needed then you could put a view over this function and almost
get "a remote view")

> Thanks
> 
> Rodrigo Gonzalez
> 
>