On Thu, Oct 28, 2010 at 11:34 AM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Andrew Dunstan <and...@dunslane.net> writes: >> On 10/28/2010 11:54 AM, Pavel Stehule wrote: >>> Alternatively, maybe the feature could be exposed in a way where you >>> don't actually calculate the values unless requested, ie provide some >>> sort of inquiry function instead of always precomputing a hash. >>> +1 .. some like get_function_info() > >> Yeah, that looks doable. > > BTW, maybe we could have the best of both worlds? Dunno about Perl, > but in some languages it would be possible to instantiate the hash > only if it's actually touched. Passing the data as a hash definitely > seems to fit with the spirit of things otherwise, so as long as it > didn't cost cycles when not needed, I'd be in favor of that API.
Perl has the tie interface (perldoc perltie) which lets you tie a hash to an object instance, which implements subs to handle the various hash operations. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers