Re: Query function arg data types ONLY (no arg names)

[Pavel Stehule <pavel.stehule@xxxxxxxxx>]

Hi

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

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