On Wed, Mar 26, 2008 at 5:45 PM, Shawn <[EMAIL PROTECTED]> wrote:
>  obviously it doesn't like the extra single quotes around the 1 msec.  Any
>  suggestions for a work around?

Use dollar quoting, e.g.:

create or replace function dur_interval_msec(int) returns interval
as
$$
select ($1 * interval '1 msec');
$$
language sql
immutable
returns null on null input;

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