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
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