If you want to use variables in your queries with procedural functions
you need to build the query as a string and use EXECUTE to run it like so:
EXECUTE 'alter table accounts_post_history_payout alter column
payout_rate set default ' || payout_rate_in || ';';
Jean-Christophe Roux wrote:
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)
--
erik jones <erik@xxxxxxxxxx>
software development
emma(r)
