On 7/1/19 12:18 PM, Wells Oliver wrote:
Hi guys, hoping you can help clarify what the 'hierarchy' of casts might
be in function arguments.
Meaning I have the following two functions
stats.foo1 (a bigint, b bigint) returns a/b::numeric
stats.foo1 (a real, b real) returns a/b::numeric
It's essentially the same function, but I thought I had to create two to
accept the different types.
However, when I call stats.foo1(3::smallint, 4::smallint) I receive the old:
ERROR: function stats.foo(smallint, smallint) is not unique
Along w/ the message to explicitly cast.
I am essentially trying to write one function that will cast "down", I
guess, anything smaller than what's passed. I am guessing I only need
the real/real argument signature, but I wanted some clarity from the group.
From the system catalogs, where float4 = real:
select typname AS cast_target from pg_cast join pg_type on
pg_cast.casttarget = pg_type.oid where castsource = 'float4'::regtype;
cast_target
-------------
int8
int2
int4
float8
numeric
select typname AS cast_target from pg_cast join pg_type on
pg_cast.casttarget = pg_type.oid where castsource = 'numeric'::regtype;
cast_target
-------------
int8
int2
int4
float4
float8
money
numeric
(7 rows)
I appreciate it.
--
Wells Oliver
wells.oliver@xxxxxxxxx <mailto:wellsoliver@xxxxxxxxx>
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
