OOPS did not mean to click send
On 3/18/2010 12:53 PM, Ignacio Balcarce wrote:
Justin,
Thanks in advance for your email. I forgot to tell than everyday IDs must start from 0. So… sequence id would look like: YYYYMMDD 00000001, YYYYMMDD 00000002, etc.
Is there any way to make this sequence start from 0 every day?
Thanks & Regards,
Ignacio
---------------------------------------------
--we need to create a table so we keep track sequence number and when to reset the count
create table sequ_id ( id_number int, sequ_name char(25), date_lastrun date);
--insert a record ;
insert into sequ_id values (1, '
thuban_seq', current_date);
--- Now for the function to generate the ID with the date leading
CREATE OR REPLACE FUNCTION THUBAN_SP_GENERATEID()
RETURNS VARCHAR
AS $$
declare creturn varchar ;
BEGIN
--now update the sequ_id table so we know the value we get makes sense,
Update sequ_id set id_number = 1 where sequ_name= '
thuban_seq' and date_lastrun <> current_date;
--now we get the next build the ID go to the table get the current value add some zeros in front and add the date to the front.
creturn = to_char( current_date, 'YYYYMMDD')::varchar || ' ' || (Select lpad( id_number::char, 7, '0' )::varchar from sequ_id where sequ_name= '
thuban_seq' )
--update the sequence table
Update sequ_id set id_number = (id_number + 1) where sequ_name= '
thuban_seq';--return the value
return creturn ;
END;
$$ LANGUAGE plpgsql;
this will do what you want.
now i have NOT tested this but should get you closer, inside of the god awful code from before.
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