PostgreSQL命令用於刪除角色所擁有的所有視圖和函數？

Question

PostgreSQL中是否有一個用於刪除特定角色擁有的所有視圖和函數的命令？我不明白所有的內部表如何連接在一起，以便我可以創建這樣的命令。

Answer 1

下降的觀點：

create function drop_views_by_owner(owner regrole, do_drop boolean default true) 
returns setof text language plpgsql as $$ 
declare r text; 
begin 
    for r in 
     select format('%s.%s', nspname, relname) 
     from pg_class c 
     join pg_namespace n on n.oid = relnamespace 
     where c.relowner = $1 
     and relkind = 'v' 
    loop 
     if do_drop then 
      execute format('drop view %s', r); 
     end if; 
     return next r; 
    end loop; 
end $$; 

刪除功能：

create function drop_functions_by_owner(owner regrole, do_drop boolean default true) 
returns setof text language plpgsql as $$ 
declare r text; 
begin 
    for r in 
     select format('%s.%s(%s)', 
      nspname, proname, pg_get_function_identity_arguments(p.oid)) 
     from pg_proc p 
     join pg_namespace n on n.oid = pronamespace 
     where p.proowner = $1 
    loop 
     if do_drop then 
      execute format('drop function %s', r); 
     end if; 
     return next r; 
    end loop; 
end $$; 

如果第二個參數是false功能不下降的對象：

select drop_views_by_owner('newuser');   -- list views and drop them 
select drop_views_by_owner('newuser', false);  -- only list views  

select drop_functions_by_owner('newuser');  -- list functions and drop them 
select drop_functions_by_owner('newuser', false); -- only list functions   

Answer 2

如果用戶只擁有意見和功能，你可以簡單地：

DROP OWNED BY your_role; 

您必須爲羣集中您用戶擁有對象的每個數據庫執行此操作。

您可能會發現這個文檔有用：https://www.postgresql.org/docs/current/static/role-removal.html