DML过程中记录错误日志

当你插入几百万数据时，由于有几条脏数据而导致插入失败，是不是很恼火。10g R2之后有个新功能。将插入过程中失败的记录插入到还有一张表中。

SQL> drop table test purge;

SQL> drop table test_bad purge;

SQL> create table test as select * from dba_objects where 1<>1;

SQL> execute dbms_errlog.create_error_log('test','test_bad');

create table TEST

(

  OWNER          VARCHAR2(30),

  OBJECT_NAME    VARCHAR2(128),

  SUBOBJECT_NAME VARCHAR2(30),

  OBJECT_ID      NUMBER,

  DATA_OBJECT_ID NUMBER,

  OBJECT_TYPE    VARCHAR2(19),

  CREATED        DATE,

  LAST_DDL_TIME  DATE,

  TIMESTAMP      VARCHAR2(19),

  STATUS         VARCHAR2(7),

  TEMPORARY      VARCHAR2(1),

  GENERATED      VARCHAR2(1),

  SECONDARY      VARCHAR2(1),

  NAMESPACE      NUMBER,

  EDITION_NAME   VARCHAR2(30)

);

create table TEST_BAD

(

  ORA_ERR_NUMBER$ NUMBER,

  ORA_ERR_MESG$   VARCHAR2(2000),

  ORA_ERR_ROWID$  UROWID(4000),

  ORA_ERR_OPTYP$  VARCHAR2(2),

  ORA_ERR_TAG$    VARCHAR2(2000),

  OWNER           VARCHAR2(4000),

  OBJECT_NAME     VARCHAR2(4000),

  SUBOBJECT_NAME  VARCHAR2(4000),

  OBJECT_ID       VARCHAR2(4000),

  DATA_OBJECT_ID  VARCHAR2(4000),

  OBJECT_TYPE     VARCHAR2(4000),

  CREATED         VARCHAR2(4000),

  LAST_DDL_TIME   VARCHAR2(4000),

  TIMESTAMP       VARCHAR2(4000),

  STATUS          VARCHAR2(4000),

  TEMPORARY       VARCHAR2(4000),

  GENERATED       VARCHAR2(4000),

  SECONDARY       VARCHAR2(4000),

  NAMESPACE       VARCHAR2(4000),

  EDITION_NAME    VARCHAR2(4000)

);

SQL> insert into test(owner) values(lpad('1',31,'aa'))

    log errors into test_bad;

insert into test(owner) values(lpad('1',31,'aa'))

                               *

第 1 行出现错误:

ORA-12899: 列 "LCAM_TEST"."TEST"."OWNER" 的值太大 (实际值: 31, 最大值: 30)





SQL> insert into test(owner) values(lpad('2',30,'bb'))

    log errors into test_bad;

已创建 1 行。

SQL> col ORA_ERR_NUMBER format a8;

SQL> col ORA_ERR_MESG$ format a50;

SQL> col OWNER format a20;

SQL> select to_char(ORA_ERR_NUMBER$) as ORA_ERR_NUMBER, ORA_ERR_MESG$, OWNER from test_bad;

ORA_ERR_ ORA_ERR_MESG$                                      OWNER

-------- -------------------------------------------------- --------------------

12899    ORA-12899: 列 "LCAM_TEST"."TEST"."OWNER" 的值太大  aaaaaaaaaaaaaaaaaaaa

         (实际值: 31, 最大值: 30)                           aaaaaaaaaa1

SQL> select count(1) from test;





  COUNT(1)

----------

         1

         

SQL> drop table test1 purge;

SQL> drop table test_bad1 purge;

SQL> create table test1 as select * from dba_objects where 1<>1;

SQL> alter table test1 modify object_id number(2);

SQL> execute dbms_errlog.create_error_log('test1','test_bad1');

SQL> insert into test1 select * from dba_objects

    log errors into test_bad1;

insert into test1 select * from dba_objects

                         *

第 1 行出现错误:

ORA-01438: 值大于为此列指定的同意精度

SQL> select count(1) from test1;

  COUNT(1)

----------

         0

SQL> select count(1) from dba_objects where length(object_id)<=2 or object_id is null;

  COUNT(1)

----------

106

--能够看到。上面的语句一有错误就回滚。须要写出下列语句

SQL> insert into test1 select * from dba_objects

    log errors into test_bad1

    reject limit unlimited;

已创建106行。

SQL> select count(1) from test1;

  COUNT(1)

----------

       106

SQL> select count(1) from dba_objects where length(object_id)<=2 or object_id is null;

  COUNT(1)

----------

106

须要说明的是：

1.插入到错误日志是自治事务，不会影响主事务。

2.使用log error并不会使append失效，但写error不会使用直接路径插入。

3.违反唯一键或约束的更新运算会导致失败回滚。