ORA-02055: distributed update operation failed; rollback required

最近同事遇到一个奇怪的问题求助，以下奉上国外大神的问题重现及解决方法

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ORA-02055: distributed update operation failed; rollback required
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You call a remote procedure or package over a database link.

Now, on the other side （the remote side）, there was an error encountered, but there were already some statements executed successfully.

Now you will need to perform a rollback before you can do a select on the calling side, or you will get this error.

原因：通过数据库链接调用远程存储过程或包。然而，执行过程中远程数据库有报错，但是部分语句已成功执行

措施：在调用端可以查询之前，需要执行回滚操作，否则将获得以上错误提示。

问题重现：

-- First we create some test usersSQL> drop user test1 cascade;User dropped.SQL> drop user test2 cascade;SQL> create user test1 identified by test1;User created.SQL> create user test2 identified by test2;User created.SQL> grant create session, create table, create trigger, create procedure, create database link to test1, test2;Grant succeeded.SQL> alter user test1 quota unlimited on system;User altered.SQL> alter user test2 quota unlimited on system;User altered.

Now we connect to test 2 （remote user） and create a tableSQL> conn test2/test2@XE
Connected.SQL> create table test2_tab（n number）;Table created.SQL> insert into test2_tab values（1）;1 row created.SQL> commit;Commit complete.

In order to demonstrate this error, we create a trigger on the newly created table, but make sure the trigger fails. In our case, we assign a character to a number field:
create or replace trigger test2_tab_bir
before insert on test2_tab
for each row
begin
:new.n := "a";
end;
/Trigger created.

Connect to test1, create database link
SQL> conn test1/test1@XE
Connected.
SQL>SQL> create database link test2 connect to test2 identified by test2 using "XE";Database link created.

Now we will create a procedure which will first do a successful dml, after that a dml that fails due to the incorrect trigger:
create or replace procedure p is
begin
-- first do a statement that executes ok
update test2_tab@test2 set n=2;
-- next statement will fail because of the invalid trigger
insert into test2_tab@test2 values（1）;
end;
/Procedure created.

Call the procedure, it will fail:
SQL> exec p
BEGIN p; END;*
ERROR at line 1:
ORA-02055: distributed update operation failed; rollback required
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
ORA-06512: at "TEST2.TEST2_TAB_BIR", line 2
ORA-04088: error during execution of trigger "TEST2.TEST2_TAB_BIR"
ORA-02063: preceding 3 lines from TEST2
ORA-06512: at "TEST1.P", line 4
ORA-06512: at line 1

Now we have a failed distributed transaction, you need to rollback, else you will get the error when selecting ANY table/view
SQL> select sysdate from dual;
select sysdate from dual
*
ERROR at line 1:
ORA-02067: transaction or savepoint rollback required-- also happens when Oracle itself calls another select recursively （notice the ORA-00604）SQL> select * from user_2pc_pending;
select * from user_2pc_pending
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-02067: transaction or savepoint rollback required
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Present By Dylan.更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=12MySQL ERROR 1044 （42000）解决方法Oracle数据库的增删改查（简单操作）相关资讯 ORA-02055 本文评论查看全部评论（0）