Re: [HACKERS] Speedup idea: avoid using SQL procedures as aliases

> I noticed just now that there are a lot of SQL-language procedures in
> pg_proc whose only purpose is to provide alternative names for 
> built-in functions.

Yeah. Neat hack, eh? Edmund Mergl found this, and allowed us to use
generic names for functions for the first time. But...

> It strikes me that this is pretty inefficient.
> I am thinking about fixing this by decoupling the user-level name of
> an internal function from its C-language name.  The simplest way seems
> to be to modify pg_proc.h and Gen_fmgrtab.sh.in so that the C-language
> name of an internal function is stored in pg_proc's "prosrc" field
> (which is currently unused for internal functions) rather than being
> taken from "proname".  Then, all of the SQL functions that are simply
> aliases for internal functions could be converted to plain internal
> function entries that have proname different from prosrc.
> Anyone have an objection to this?  I suppose we'd need to check that
> the regression tests still exercise SQL functions ;-)

No objection; I've toyed with the idea of doing this, but didn't have
the guts to touch the layout of system tables. You seem to have no
such qualms ;)

I'd be happy to help with the conversion, though I'd suggest that this
would perhaps be a great topic for v6.6 since it does involve some
fundamental (hopefully isolated) changes. Also, for my participation
(certainly not required) I'd have more time during the next cycle...
                     - Tom