Query function arg data types ONLY (no arg names)

Hi

2018-04-28 18:52 GMT+02:00 Jeremy Finzel <finzelj@gmail.com>:

It appears that neither pg_get_function_arguments
nor pg_get_function_identity_arguments could be used for this. I want to
get function argument data types from the catalog by ordinal position,
without the argument name.

For example, I want the same information for these 2 functions:

foo(p_1 int, p_2 text)

- {int, text}

foo(int, text)

- {int, text}

Any suggestions as to how to use the catalogs or built-in postgres
functions to query this?

CREATE OR REPLACE FUNCTION public.foo(a integer, b integer, c text)
RETURNS text
LANGUAGE sql
AS $function$ select 'hi'; $function$

postgres=# select (proargtypes::regtype[])[0:] from pg_proc where proname =
'foo';
┌─[ RECORD 1 ]┬────────────────────────┐
│ proargtypes │ {integer,integer,text} │
└─────────────┴────────────────────────┘

Regards

Pavel

Jeremy Finzel <finzelj@gmail.com> writes:

It appears that neither pg_get_function_arguments
nor pg_get_function_identity_arguments could be used for this. I want to
get function argument data types from the catalog by ordinal position,
without the argument name.

Something involving pg_proc.proargtypes::regtype[] might be useful.

regards, tom lane

On Sat, Apr 28, 2018 at 12:01 PM Pavel Stehule <pavel.stehule@gmail.com>
wrote:

Hi

2018-04-28 18:52 GMT+02:00 Jeremy Finzel <finzelj@gmail.com>:

It appears that neither pg_get_function_arguments
nor pg_get_function_identity_arguments could be used for this. I want to
get function argument data types from the catalog by ordinal position,
without the argument name.

For example, I want the same information for these 2 functions:

foo(p_1 int, p_2 text)

- {int, text}

foo(int, text)

- {int, text}

Any suggestions as to how to use the catalogs or built-in postgres
functions to query this?

CREATE OR REPLACE FUNCTION public.foo(a integer, b integer, c text)
RETURNS text
LANGUAGE sql
AS $function$ select 'hi'; $function$

postgres=# select (proargtypes::regtype[])[0:] from pg_proc where proname
= 'foo';
┌─[ RECORD 1 ]┬────────────────────────┐
│ proargtypes │ {integer,integer,text} │
└─────────────┴────────────────────────┘

Regards

Pavel

Thank you!
Jeremy

This is perfect - thank you!