Edmar Wiggers wrote:
> > If I try to insert some row which in the table already exist the
> > postgre don't insert it and tell some error. Everything ok.
> > I'll insert only if there is not the same (same key) record,
> > else don't insert and don't tell me errors about it.
> > In MySQL is a switch [IGNORE].
>
> Not a good feature for me. What do you do if the record already exists?
> Update it?
>
> Check existence and then insert or update. If you want, I guess you could
> wrap that inside a stored procedure.
Hi, here is an example of using function using pl/pgsql for inserting and
checking whether an instance exists or not.....
CREATE FUNCTION add_new_user(text,text) RETURNS bool AS' DECLARE
oldUser RECORD;
USR ALIAS FOR $1;
PWORD ALIAS FOR $2;
BEGIN
SELECT INTO oldUser *
FROM users
where username=USR AND password= PWORD;
IF FOUNDTHEN RETURN ''f'';
ELSEINSERT INTO USERS(username,password) values(USR,PWORD); RETURN ''t'';
END IF;
END;'
LANGUAGE 'plpgsql';
Regards.
Najm