Re: How can I list the function.

["Shoaib Mir" <shoaibmir@xxxxxxxxx>]

That actually depends on the nature of function as well. According to the PostgreSQL manual:

\df [ pattern ]
\df+ [ pattern ]

Lists available functions, together with their argument and return types. If pattern is specified, only functions whose names match the pattern are shown. If the form \df+ is used, additional information about each function, including language and description, is shown.

Note: To look up functions taking argument or returning values of a specific type, use your pager's search capability to scroll through the \df output.

To reduce clutter, \df does not show data type I/O functions. This is implemented by ignoring functions that accept or return type cstring .

I just tried the following at my end with 8.2:

CREATE FUNCTION add(integer, integer) RETURNS integer
    AS 'select $1 + $2;'
    LANGUAGE SQL
    IMMUTABLE
    RETURNS NULL ON NULL INPUT;

and then doing a

\df+ add

did show me the correct output...

You can also try the following to get the same type of results:

select proargtypes, prorettype, prosrc from pg_proc where proname = 'delete_old';

---
Shoaib Mir
EnterpriseDB (www.enterprisedb.com
)

On 2/1/07, Harvey, Allan AC <HarveyA@xxxxxxxxxxxx> wrote:

I know the function is there.
What am I doing wrong?

galvdb=#
galvdb=# \df+ delete_old
                                           List of functions
Result data type | Schema | Name | Argument data types | Owner | Language | Source code | Description
------------------+--------+------+---------------------+-------+----------+-------------+-------------
(0 rows)

galvdb=# select delete_old();
delete_old
------------
        482
(1 row)

galvdb=# select version();
                                       version
-------------------------------------------------------------------------------------
PostgreSQL 8.2.0 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.3.3 (SuSE Linux)
(1 row)

galvdb=#


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