> Thomas G. Lockhart wrote:
> >
> > > istm that we should be focusing on Vadim's hints on what it would take
> > > to use indices with function calls on constants...
> >
> > Looking at Vadim's note again, maybe it will be the parser's duty to
> > insert the PARAM_EXEC node; will need more details or some time to look
> > at it...
>
> Sorry, but maybe it would be better to add new attribute
> to pg_proc (and change CREATE FUNCTION syntax) to let
> parser know does result of function call on constants depend
> on execution time or not. This would be much better just
> execute function in parser and replace function with
> constant.
> Currently, only random(), now() and SPI-functions should be
> replaced by PARAM_EXEC, all others could be evaluated by parser.
I see. We have pg_proc.proiscachable. This looks like a good
candidate, and is not used for anything currently. Maybe rename it to
something clearer.
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