On 21.09.2011 18:46, Tom Lane wrote:
> Well, we'd have to negotiate what the API ought to be. What I'm
> envisioning is that datatypes could provide alternate comparison
> functions that are designed to be qsort-callable rather than
> SQL-callable. As such, they could not have entries in pg_proc, so
> it seems like there's no ready way to represent them in the catalogs.
Quite aside from this qsort-thing, it would be nice to have versions of
all simple functions that could be called without the FunctionCall
overhead. So instead of:
FunctionCall2(&flinfo_for_int4pl, 1, 2)
you could do simply
int4pl_fastpath(1,2)
I'm not sure how big an effect this would have, but it seems like it
could shave some cycles across the system.
We could have an extended version of the PG_FUNCTION_INFO_V1 macro that
would let you register the fastpath function:
PG_FUNCTION_INFO_V1(int4pl, int4pl_fastpath);
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com