Re: ERROR: function round(double precision, integer) does not exist - WTF?

"Glen Parker"  writes:
> DB=# select round(1.25::float, 2);
> ERROR:  function round(double precision, integer) does not exist

> What the heck?  This can't be right... Can it?

regression=# \df round
                      List of functions
 Result data type |   Schema   | Name  | Argument data types
------------------+------------+-------+---------------------
 double precision | pg_catalog | round | double precision
 numeric          | pg_catalog | round | numeric
 numeric          | pg_catalog | round | numeric, integer
(3 rows)

Looks right to me: the only 2-arg flavor of round() is on numeric,
not float8.

You could always cast the float to numeric, of course.  I think in
7.2 such conversions were allowed silently, but we have reduced the
number of implicit type coercions.

			regards, tom lane