COALESCE bug

Hy,

my PostgreSQL 8.0.0 on i686-pc-mingw32, compiled by GCC gcc.exe (GCC) 3.4.2

crashes when

SELECT * FROM pg_stat_activity WHERE datname=COALESCE(NULL, NULL);

I had an mistake in a stored procedure so COALESCE got 2 NULL values but
a crash is not nice here ;-)

workaround :
SELECT * FROM pg_stat_activity WHERE datname=COALESCE(NULL, NULL, '');
so COALESCE has one nice param to return.

Daniel

(Windows)