Gevik Babakhani <pgdev@xs4all.nl> writes:
>> I experimented with your example and noticed that pg_get_expr requires a
>> hack --- it insists on having a relation OID argument, because all
>> previous use-cases for it involved expressions that might possibly refer
>> to a particular table. So you have to do something like
>>
>> regression=# select pg_get_expr(proargdefaults,'pg_proc'::regclass) from pg_proc where proname='f13';
>> pg_get_expr
>>
-----------------------------------------------------------------------------------------------------------------------
>> 10, 'hello'::character varying, '2009-01-01 00:00:00'::timestamp without time zone, 'comma here ,'::character
varying
>> (1 row)
>>
>>
> Unfortunately, there is no way to know to which argument(s) the values
> above belongs to.
The last ones --- you can only omit arguments from the right, so it
makes no sense to allow a nonconsecutive set of defaults.
regards, tom lane