Re: get column default value

[Jean-Christophe Roux <jcxxr@xxxxxxxxx>]

Hi,
Thank you very much for the tip; it works fine and I can query easily default values.
I have this function:
CREATE OR REPLACE FUNCTION func_accounts_post_history_default(payout_rate_in numeric)
  RETURNS text AS
$BODY$
declare
    i integer;
begin
    --alter table accounts_post_history_payout  alter column payout_rate set default payout_rate_in;
    alter table accounts_post_history_payout  alter column payout_rate set default 0;
    return 'Default values have been updated.';
end;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

The uncommented alter command works but the commented one does not work because it apparently lacks the new default value.  Any idea how I should change the syntax? I find it strange because I usually do not have any problem using parameters in my function.

Thanks

----- Original Message ----
From: Erik Jones <erik@xxxxxxxxxx>

>> Hello,
>> How can I get the default value for a column?
>> To change the default value, something like
>> ALTER TABLE dummy ALTER COLUMN value SET DEFAULT -12;
>> would do the job, but how could I query the value?
>>
>>
>> Thanks in advance
>
SELECT adsrc as default_value
FROM pg_attrdef pad, pg_atttribute pat, pg_class pc
WHERE pc.relname='your_table_name'
    AND pc.oid=pat.attrelid AND pat.attname='your_column_name'
    AND pat.attrelid=pad.adrelid AND pat.attnum=pad.adnum

--
erik jones <erik@xxxxxxxxxx>
software development
emma(r)