Where in the system catalog is the function body stored?

Question

I am trying to build a documentation system for my database and I would like to include the source of my functions and triggers.

I managed to find all of the metadata on

Answer 1

Use the function pg_get_functiondef() to get the complete function definition:

SELECT pg_get_functiondef('my_schema.my_func(int)'::regprocedure)

The cast to the object identifier regprocedure is the simplest way to get the oid of your function, which you feed to the above function.

The manual on pg_catalog.pg_proc:

For compiled functions, both built-in and dynamically loaded, prosrc contains the function's C-language name (link symbol). For all other currently-known language types, prosrc contains the function's source text.

To retrieve the function body only:

SELECT prosrc 
FROM   pg_proc
WHERE  oid = 'my_schema.my_func(int)'::regprocedure;