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} │ └─────────────┴────────────────────────┘