如果“ After” DDL触发器会导致错误，那么DDL是否回滚？

Question

它 已提出 DDL在逻辑上执行类似的事情：

begin
    COMMIT;
    perform any appropriate pre-DDL trigger code;
    do the ddl;
    perform any appropriate post-DDL trigger code;
    COMMIT;
exception
    when others then
         ROLLBACK;
         raise;
end;

这表明触发器中的任何错误都会导致DDL回滚。是这样吗？

Answer 1

答案至少在11.2上是“取决于”：

这个 create 回头：

create trigger trig_foo after create on schema
begin
  raise_application_error(-20001, 'Dont do it!');
end;
/
--
create table foo as select level as id from dual connect by level<=10000;
/*
SQL Error: ORA-00604: error occurred at recursive SQL level 1
ORA-20001: Dont do it!
*/
--
select count(*) from foo;
/*
SQL Error: ORA-00942: table or view does not exist
*/

但是这个 truncate 不是：

create table foo as select level as id from dual connect by level<=10000;
--
create trigger trig_foo after truncate on schema
begin
  raise_application_error(-20001, 'Dont do it!');
end;
/
--
truncate table foo;
/*
SQL Error: ORA-00604: error occurred at recursive SQL level 1
ORA-20001: Dont do it!
*/
select count(*) from foo;
/*
COUNT(*)               
---------------------- 
0                  
*/