Re: type info refactoring

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Cc: Peter Eisentraut <peter_e@gmx.net>, pgsql-hackers@postgresql.org
Date: 2010-10-31T17:01:55Z
Lists: pgsql-hackers
Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> writes:
> ... I assumed that TypeInfo would be 
> embedded in other structs directly, rather than a pointer and palloc. 

Yeah, that would avoid the extra-pallocs complaint, although it might be
notationally a bit of a PITA in places like equalfuncs.c.  I think that
would end up needing a separate COMPARE_TYPEINFO_FIELD macro instead of
being able to treat it like a Node* field.

But I'm still wondering whether it's smart to try to promote all of this
fundamentally-auxiliary information to first-class status.  It's really
unclear to me that that will end up being a net win either conceptually
or notationally.

			regards, tom lane