On Mon, 2008-06-23 at 15:13 +0200, Pavel Stehule wrote:

> this patch enhance current syntax of CREATE FUNCTION statement. It
> allows creating functions with variable number of arguments. This
> version is different than last my patches. It doesn't need patching
> PL. Basic idea is transformation of real arguments (related to
> declared variadic argument) to array. All changes are mostly in
> parser.

Something for the TODO.

An added thought with regard to variadic functions:

when we have them, we should be able to parse/transform repeated
operator sequences into a call to a variadic function, if it exists.

e.g. w || x || y || z can be transformed into a call to 
concat_variadic(w, x, y, z) 

This can then be made to perform better than

concat(concat(concat(w, x), y), z)

which would involve lots of wasted memory copies.

 Simon Riggs           www.2ndQuadrant.com
 PostgreSQL Training, Services and Support

Sent via pgsql-patches mailing list (pgsql-patches@postgresql.org)
To make changes to your subscription:

Reply via email to