On 08/20/2014 06:25 AM, Lori Corbani wrote:
> Using Postgres Version 9.0.4:
>
> We are migrating our Sybase stored procedures to Postgres and need to be
> able to drop/replace the SPs, making needed changes to input parameters
> to fix issues/differences between Sybase and Postgres.
>
> However, we keep getting this error when we drop/replace the PG/SP:
Are you actually doing DROP and then CREATE OR REPLACE FUNCTION or just
doing CREATE OR REPLACE FUNCTION ?
The first case will work, the second will not:
test=> CREATE FUNCTION sales_tax(subtotal real, OUT tax real) AS $$
test$> BEGIN
test$> tax := subtotal * 0.06;
test$> END;
test$> $$ LANGUAGE plpgsql;
CREATE FUNCTION
test=> CREATE OR REPLACE FUNCTION public.sales_tax(stotal real, OUT tax
real)
RETURNS real
LANGUAGE plpgsql
AS $function$
BEGIN
tax := subtotal * 0.06;
END;
$function$
ERROR: cannot change name of input parameter "subtotal"
HINT: Use DROP FUNCTION sales_tax(real) first.
test=> drop function sales_tax(real) ;
DROP FUNCTION
test=> CREATE OR REPLACE FUNCTION public.sales_tax(stotal real, OUT tax
real)
RETURNS real
LANGUAGE plpgsql
AS $function$
BEGIN
tax := subtotal * 0.06;
END;
$function$
;
CREATE FUNCTION
>
> ‘ERROR : cannot change name of input parameter’
>
> The ‘create function’ documentation states:
>
> ‘You cannot change the name already assigned to any input parameter
> (although you can add names to parameters that had none before).’
>
> Other than a complete restore of the database from a dump that does
> **not** contain the original SP…is there any other way to override this
> constraint?
>
> This makes debugging **extremely** difficult. If you don’t have your
> input parameters completely correct the first time…you’re hosed.
>
> Many thanks.
>
> Lori
>
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--
Adrian Klaver
adrian.klaver@aklaver.com
