Create a stored procedure to Delete Records postgres-CodePudding

I have created a function to delete multiple records.In our table contain id as type uuid. We get the input is like array of ids.

  CREATE OR REPLACE FUNCTION public.deletetVersion(item_list uuid[])
  RETURNS TABLE(id uuid[]) 
  LANGUAGE 'plpgsql'
  COST 100
  VOLATILE PARALLEL UNSAFE
  ROWS 1000
  AS $BODY$
   BEGIN
       RETURN QUERY
         DELETE FROM version WHERE id = ANY(item_list);
  END; 
 $BODY$;

SELECT * from deletetVersion(Array['b6ad1912-e4f1-4419-831a-c70df89ffd63','877898f0-2f3f-4890-a658-898e35ffee3a'])

But i got an error like:

Anyone please help me

  ERROR:  function deletetversion(text[]) does not exist

CodePudding user response：

it is because the

Array['b6ad1912-e4f1-4419-831a-c70df89ffd63','877898f0-2f3f-4890-a658-898e35ffee3a']

is treated as text[]

try the following

Array['b6ad1912-e4f1-4419-831a-c70df89ffd63'::uuid,'877898f0-2f3f-4890-a658-898e35ffee3a'::uuid]

as a parameter to your function

for example

  CREATE OR REPLACE FUNCTION public.test_uuid(item_list uuid[])
  RETURNS TABLE(id uuid[]) 
  LANGUAGE 'plpgsql'
  COST 100
  VOLATILE PARALLEL UNSAFE
  ROWS 1000
  AS $BODY$
   BEGIN
       RETURN QUERY
         SELECT item_list;
  END; 
 $BODY$;
 
 
 
 SELECT * from test_uuid(Array['b6ad1912-e4f1-4419-831a-c70df89ffd63'::uuid])

In case of deletion

  CREATE OR REPLACE FUNCTION public.test_uuid(item_list uuid[])
  RETURNS VOID
  LANGUAGE 'plpgsql'
  COST 100
  VOLATILE PARALLEL UNSAFE
  ROWS 1000
  AS $BODY$
  BEGIN
   RETURN QUERY
     DELETE from tableName WHERE id = ANY(item_list);

  END; 
  $BODY$;

CodePudding user response：

Your function should return either setof uuid - i.e. a table of uuid-s - or uuid[]. I would prefer the first. You do not need PL/pgSQL, plain SQL is enough. So the function is:

create or replace function public.deletetVersion(item_list uuid[])
returns setof uuid language 'sql' as
$$
  delete from version where id = any(item_list) returning id;
$$;

The version returning an array is a bit more complex:

create or replace function public.deletetVersion(item_list uuid[])
returns uuid[] language 'sql' as
$$
with t(d_id) as
(
  delete from version where id = any(item_list) returning id
)
select array_agg(d_id) from t;
$$;

And - as @Ibrahimshamma says - you may need to cast the argument to uuid[].