accessing functions in the core

Sushant Sinha wrote:

I would like to create functions in the core and then access it.
However, I do not know how to do it. Looks like all functions in the
core are not accessible from outside. For example ts_headline_opt which
is there in the core seems to be not present in pg_catalog.
This is the query I used to test:

This is the wrong list to ask this kind of question. Try -general next time.
Indeed, the function name doesn't need to have the same name defined in
C code [1]http://www.postgresql.org/docs/8.3/static/sql-createfunction.html. As you can see below, ts_headline_opt is called ts_headline
with 3 arguments.

euler=# select proname,prosrc,provolatile,pronargs from pg_proc where
proname ~ 'ts_headline';
proname | prosrc | provolatile | pronargs
-------------+----------------------+-------------+----------
ts_headline | ts_headline_byid_opt | i | 4
ts_headline | ts_headline_byid | i | 3
ts_headline | ts_headline_opt | s | 3
ts_headline | ts_headline | s | 2
(4 registros)

[1]: http://www.postgresql.org/docs/8.3/static/sql-createfunction.html

--
Euler Taveira de Oliveira
http://www.timbira.com/