这是因为

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

被视为文本[]
请尝试以下操作

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

作为函数的参数
例如，

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])

删除时

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; 
  $BODY$;

您的函数应该返回setof uuid-即uuid-s表-或uuid[]。我更喜欢第一个。您不需要PL/pgSQL，纯SQL就足够了。因此函数为：

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

返回数组的版本稍微复杂一些：

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

而且--正如@Ibrahimshamma所说--你可能需要把这个论点转化为uuid[]。