Yes, I believe so (well, actually the optimizer). An inlined SQL function ends up behaving like a macro that expands at run time and is therefore quite fast -- no function call overhead at all.
... but only in 7.4. In 7.2 and I think in 7.3 this was not implemented.
Yeah, that's what my original post said ;-)
While we're on the topic, anyone know any good ways to speed up EXECUTE statements in PL/pgSQL functions?
Never tried it, but is it possible to use a prepared statement inside a PL/pgSQL function? In any case, you can in other PLs. And with library preloading (starting in 7.4), the first call to other PLs is similar to that of PL/pgSQL. See:
http://archives.postgresql.org/pgsql-patches/2003-07/msg00239.php
Joe
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