创建具有自动提交功能的oracle表 [英] Create oracle table with auto commit on

问题描述

这是场景， 我正在编写一个在多个表上执行DML(insert，delete)操作的过程.如果出现异常，我需要回滚除一个表以外的大多数表中的数据.

Here is the scenario, I am writing a procedure which performs DML(insert,delete) operations on multiple tables. In case of exception I need to rollback data from most of the tables except one.

示例:

程序{

1 Insert into table1

2 Delete from table2

3 Insert into Table3

4 Insert into table4

 Commit;

例外

Rollback;

}

如果第4个插入中有任何异常，我需要回滚除第3个以外的所有先前的事务. 我知道，提交/回滚不能那样工作.但是也许在创建table3时有办法，我可以设置一些参数，以便自动提交table3上的每个INSERT语句.

If there is any exception in 4th Insert, I need to rollback all previous transaction except 3rd one. I know, commit/rollback doesn't work like that. But maybe is there way while creating table3, I can set some parameter so that every INSERT statement on table3 will be auto commited.

推荐答案

可以使用自主交易.

CREATE TABLE t1 (x INTEGER PRIMARY KEY);
CREATE TABLE t2 (x INTEGER);
CREATE TABLE t3 (x INTEGER);
CREATE TABLE t4 (x INTEGER REFERENCES t1(x));

然后运行此匿名PL/SQL.仔细查看，本地过程upd_table_3在声明时未运行.在主BEGIN块中调用时运行:

Then run this anononymous PL/SQL. Look carefully, the local procedure upd_table_3 isn't run when it's declared. It's run when called within the main BEGIN block:

DECLARE 
  PROCEDURE upd_table_3 IS
  PRAGMA AUTONOMOUS_TRANSACTION;
  BEGIN
    INSERT INTO t3 VALUES (3);
    COMMIT;
  END;
BEGIN
  INSERT INTO t1 VALUES (1);
  INSERT INTO t2 VALUES (2);
  upd_table_3;
  INSERT INTO t4 VALUES (4);
  COMMIT;
END;
/

在第四个插入ORA-02291的过程中，该过程应故意失败.我是这样做的.然后

The procedure should fail intentionally on the 4th insert with ORA-02291. I made it this way. Then

ROLLBACK;

除t3以外，所有表都应回滚，我们在自动事务中进行了插入.

All the tables should be rolled back except t3, which we did the insert in an autonomous transaction.

SELECT * FROM t1;

no rows selected

SELECT * FROM t2;

no rows selected

SELECT * FROM t3;

         X
----------
         3

SELECT * FROM t4;

no rows selected

这篇关于创建具有自动提交功能的oracle表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！