Re: uinique identifier

What's wrong with using the OID column of pg_class or the OID column of your
table?

Chris

----- Original Message -----
From: "||//::..-cwhisperer-..:://||" <cwhisperer(at)vo(dot)lu>
To: <pgsql-sql(at)postgresql(dot)org>
Sent: Sunday, May 26, 2002 3:53 AM
Subject: [SQL] uinique identifier

> hi,
>
> I want to create an unique identifier for all the tables in my db.
>
> as paramater I pass the length of the identifier and the table name:
>
> here my function
>
> DROP FUNCTION ui_alz_table (int4,varchar);
>
> CREATE FUNCTION ui_alz_table (int4,varchar) RETURNS varchar AS '
>
> DECLARE
> iLoop int4;
> result varchar;
> nr int4;
> query_string varchar;
>
> BEGIN
> result := '''';
> nr := 1;
>
> IF ($1>0) AND ($1 < 255) THEN
> WHILE nr > 0 LOOP
> FOR iLoop in 1 .. $1 LOOP
> result := result || chr(int4(random()*25)+65);
> END LOOP;
> query_string := ''Select * from ''|| $2 || '' where id = ''
|| result;
> EXECUTE query_string;
> IF NOT FOUND THEN
> nr := 0;
> END IF;
> END LOOP;
> RETURN result;
> END IF;
> END;
> ' LANGUAGE 'plpgsql';
>
> in the for loop I create the unique identifier and whith the
> query_string I check whetherit exists or not.
>
> but I get an error 'Attribute xxxx not found' and I don't know what to to
with it.
>
> thx for your help
>
>
>
> --
> Best regards,
> ||//::..-cwhisperer-..:://||
mailto:cwhisperer(at)vo(dot)lu
>
>
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