Query function arg data types ONLY (no arg names)

[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?

Thank you!

Jeremy