老版本PL/SQL Developer操作数据库导致ORA-00600[17113]

在巡检某运营商的计费库时,发现alert日志中发现如下错误

Thu Feb  2 13:54:52 2012
Errors in file /oracle9/app/admin/bill/udump/bill1_ora_35651918.trc:
ORA-00600: internal error code, arguments: [17113], [0x000000000], [], [], [], [], [], []

查看trace文件

Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.6.0 - Production
ORACLE_HOME = /oracle9/app/product/9.2.0
System name:    AIX
Node name:      zwq_bill_1
Release:        1
Version:        6
Machine:        00F64FF34C00
Instance name: bill1
Redo thread mounted by this instance: 1
Oracle process number: 200
Unix process pid: 35651918, image: oracle@zwq_bill_1 (TNS V1-V3)

*** 2012-02-02 13:54:52.169
*** SESSION ID:(210.1380) 2012-02-02 13:54:52.150
********** Internal heap ERROR 17113 addr=0 *********
******************************************************
HEAP DUMP heap name=""  desc=0
 extent sz=0x0 alt=0 het=0 rec=0 flg=0 opc=0
 parent=0 owner=0 nex=0 xsz=0x0
 Hla: -1
*** 2012-02-02 13:54:52.169
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [17113], [0x000000000], [], [], [], [], [], []
Current SQL statement for this session:
declare
  t_owner varchar2(30);
  t_name  varchar2(30);
  procedure check_mview is
    dummy integer;
  begin
    if :object_type = 'TABLE' then
      select 1 into dummy
      from sys.all_objects
      where owner = :object_owner
      and object_name = :object_name
      and object_type = 'MATERIALIZED VIEW'
      and rownum = 1;
      :object_type := 'MATERIALIZED VIEW';
    end if;
  exception
    when others then null;
  end;
begin
  :sub_object := null;
  if :deep != 0 then
    begin
      if :part2 is null then
        select constraint_type, owner, constraint_name
          into :object_type, :object_owner, :object_name
          from sys.all_constraints c
         where c.constraint_name = :part1 and c.owner = user
           and rownum = 1;
      else
        select constraint_type, owner, constraint_name, :part3
          into :object_type, :object_owner, :object_name, :sub_object
          from sys.all_constraints c
         where c.constraint_name = :part2 and c.owner = :part1
           and rownum = 1;
      end if;
      if :object_type = 'P' then :object_type := 'PRIMARY KEY'; end if;
      if :object_type = 'U' then :object_type := 'UNIQUE KEY'; end if;
      if :object_type = 'R' then :object_type := 'FOREIGN KEY'; end if;
      if :object_type = 'C' then :object_type := 'CHECK CONSTRAINT'; end if;        
      return;
    exception
      when no_data_found then null;
    end;
  end if;
  :sub_object := :part2;
  if (:part2 is null) or (:part1 != user) then
    begin
      select object_type, user, :part1
      into :object_type, :object_owner, :object_name
      from sys.all_objects
      where owner = user
      and object_name = :part1
      and object_type in ('MATERIALIZED VIEW', 'TABLE', 'VIEW', 'SEQUENCE', 'PROCEDURE', 'FUNCTION', 'PACKAGE', 'TYPE', 'TRIGGER', 'SYNONYM')
      and rownum = 1;
      if :object_type = 'SYNONYM' then
        select s.table_owner, s.table_name
          into t_owner, t_name
          from sys.all_synonyms s
         where s.synonym_name = :part1
           and s.owner = user
           and rownum = 1;
        select o.object_type, o.owner, o.object_name
          into :object_type, :object_owner, :object_name
          from sys.all_objects o 
         where o.owner = t_owner
           and o.object_name = t_name
           and object_type in ('MATERIALIZED VIEW', 'TABLE', 'VIEW', 'SEQUENCE', 'PROCEDURE', 'FUNCTION', 'PACKAGE', 'TYPE', 'TRIGGER', 'SYNONYM')
           and rownum = 1;
      end if;
      :sub_object := :part2;
      if :part3 is not null then
        :sub_object := :sub_object || '.' || :part3;
      end if;
      check_mview;
      return;
    exception
      when no_data_found then null;
    end;
  end if;
  begin
    select s.table_owner, s.table_name
      into t_owner, t_name
      from sys.all_synonyms s
     where s.synonym_name = :part1
       and s.owner = 'PUBLIC'
       and rownum = 1;
    select o.object_type, o.owner, o.object_name
      into :object_type, :object_owner, :object_name
      from sys.all_objects o 
     where o.owner = t_owner
       and o.object_name = t_name
       and object_type in ('MATERIALIZED VIEW', 'TABLE', 'VIEW', 'SEQUENCE', 'PROCEDURE', 'FUNCTION', 'PACKAGE', 'TYPE', 'TRIGGER', 'SYNONYM')
       and rownum = 1;
    check_mview;
    return;
  exception
    when no_data_found then null;
  end;
  :sub_object := :part3;
  begin
    select o.object_type, o.owner, o.object_name
      into :object_type, :object_owner, :object_name
      from sys.all_objects o
     where o.owner = :part1
       and o.object_name = :part2
       and object_type in ('MATERIALIZED VIEW', 'TABLE', 'VIEW', 'SEQUENCE', 'PROCEDURE', 'FUNCTION', 'PACKAGE', 'TYPE', 'TRIGGER', 'SYNONYM')
       and rownum = 1;
    check_mview;
    return;
  exception
    when no_data_found then null;
  end;
  begin
    if :part2 is null and :part3 is null
    then
      select 'USER', null, :part1
      into :object_type, :object_owner, :object_name
      from sys.all_users u
      where u.username = :part1
      and rownum = 1;
      return;
    end if;
  exception
    when no_data_found then null;
  end;
  begin
    if :part2 is null and :part3 is null and :deep != 0
    then
      select 'ROLE', null, :part1
      into :object_type, :object_owner, :object_name
      from sys.session_roles r
      where r.role = :part1
      and rownum = 1;
      return;
    end if;
  exception
    when no_data_found then null;
  end;
  :object_owner := null;
  :object_type := null;
  :object_name := null;
  :sub_object := null;
end;

通过观察trace的这部分可以知道,是执行这条sql语句导致了ora-600[17113]错误的产生,而这条语句是查询系统对象,初步怀疑是oracle客户端上产生,继续阅读trace文件发现

    SO: 7000000b926f188, type: 4, owner: 7000000bd298b00, flag: INIT/-/-/0x00
    (session) trans: 0, creator: 7000000bd298b00, flag: (41) USR/- BSY/-/-/-/-/-
              DID: 0001-00C8-0009F6EF, short-term DID: 0000-0000-00000000
              txn branch: 0
              oct: 47, prv: 0, sql: 7000000d481ee78, psql: 7000000e086d8d8, user: 567/IBILLAPP
    O/S info: user: Administrator, term: WWW-39A255460E8, ospid: 784:2080, machine: WORKGROUP\WWW-39A255460E8
              program: plsqldev.exe
    application name: PL/SQL Developer, hash value=1190136663
    action name: Main session, hash value=1773317990
    last wait for 'SQL*Net more data from client' blocking sess=0x0 seq=78 wait_time=4
                driver id=54435000, #bytes=34, =0
    temporary object counter: 0

从这里进一步确认是有人使用PL/SQL Developer从WORKGROUP\WWW-39A255460E8的机器上操作该数据库导致,查询mos,果然发现该问题记录[ID 396326.1]。
解决办法:使用新版本的plsql dev工具即可解决问题。

ORA-19583/ORA-27206/ORA-06512

检查alert日志发现近期数据库出现了ORA-19583/ORA-27206/ORA-06512错误

Fri Dec 30 12:22:36 2011
Errors in file /oracle9/app/admin/ykcdb/udump/ykcdb_ora_5390564.trc:
ORA-19583: conversation terminated due to error
ORA-27206: requested file not found in media management catalog
ORA-06512: at "SYS.DBMS_BACKUP_RESTORE", line 625

进一步查看trace文件发现

Oracle9i Enterprise Edition Release 9.2.0.7.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.7.0 - Production
ORACLE_HOME = /oracle9/app/product/9.2.0
System name:    AIX
Node name:      OFFON2
Release:        3
Version:        5
Machine:        000A36B8D600
Instance name: ykcdb
Redo thread mounted by this instance: 1
Oracle process number: 79
Unix process pid: 5390564, image: oracle@OFFON2 (TNS V1-V3)

*** 2011-12-30 12:22:36.051
*** SESSION ID:(32.62184) 2011-12-30 12:22:36.023
FATAL ERROR IN TWO-TASK SERVER: error = 12152
*** 2011-12-30 12:22:36.051
ksedmp: internal or fatal error
ORA-19583: conversation terminated due to error
ORA-27206: requested file not found in media management catalog
ORA-06512: at "SYS.DBMS_BACKUP_RESTORE", line 625
----- Call Stack Trace -----
calling              call     entry                argument values in hex      
location             type     point                (? means dubious value)     
-------------------- -------- -------------------- ----------------------------
ksedmp+0148          bl       ksedst               1025AE55C ?
opitsk+0968          bl       ksedmp               20289E71C ?
opiino+0798          bl       opitsk               000000000 ? 000000000 ?
opiodr+08c8          bl       _ptrgl               
opidrv+032c          bl       opiodr               3C00000018 ? 4101C7F40 ?
                                                   FFFFFFFFFFFF810 ? 0A03547C8 ?
sou2o+0028           bl       opidrv               3C0C000000 ? 4A039C2D0 

查看mos发现[ID 558993.1]提供了错误原因和解决方案
错误原因:RMAN backup to tape using veritas netbackup,The MML parameters like NB_ORA_CLIENT and NB_ORA_SERV were not given in proper case while configuring channel in RMAN backup.
解决方法:The NB_ORA_CLIENT and NB_ORA_SERV MML parameters are case sensitive. So make sure to give these parameters in same case while allocating or configuring RMAN channel as it is configure in Veritas server.

使用dblink导致scn发现改变

1.dblink目标端

[oracle@node1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Sat Jan 21 15:25:59 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options

SQL> select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER scn from dual;

       SCN
----------
  17454270

SQL> select file#,CHECKPOINT_CHANGE# scn from v$datafile;

     FILE#        SCN
---------- ----------
         1   17454265
         2   17454265
         3   17454265
         4   17454265
         5   17454265
         6   17454265
         7   17454265
         8   17454265
         9   17454265
        10   17454265
        11   17454265

     FILE#        SCN
---------- ----------
        13   17454265
        14   17454265

13 rows selected.

通过这里可以知道,该数据库目前的scn是小于18000000。

2.dblink操作

[oracle@node1 admin]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.5.0 - Production on Sat Jan 21 15:49:39 2012

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER scn from dual;

       SCN
----------
  20359364

SQL> select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER scn from dual@chf;

       SCN
----------
  20359367

通过这步操作发现目标端的scn发生改变,和原端库scn一致(因为先后关系,有小出入)

3.再次查看dblink目标端

SQL>  alter system checkpoint;

System altered.

SQL> select file#,CHECKPOINT_CHANGE# scn from v$datafile;

     FILE#        SCN
---------- ----------
         1   20359409
         2   20359409
         3   20359409
         4   20359409
         5   20359409
         6   20359409
         7   20359409
         8   20359409
         9   20359409
        10   20359409
        11   20359409

     FILE#        SCN
---------- ----------
        13   20359409
        14   20359409

13 rows selected.

通过checkpoint之后,发现目标库的scn已经发现改变(向前推荐),从而证明使用dblink,确实使得scn小的库和scn大的库一致。

人生中的十个不要等

一、不要等到想要得到爱时才学会付出

  人生就像一场戏,在等待中错过了美丽。正如歌中所唱:该出手时就出手。因为幸福就在你身边。当你付出时,爱以从你身边轻轻划过,留下的是悔恨、遗憾。
二、不要等到孤单时才想念起你的朋友

  什么是朋友?真正的朋友永远不会离弃你。人生得一知己足矣,孤独时、彷徨时,朋友是你最忠实的听众,他们没有怨言,他们有的只是一颗包容的心。
三、不要等到有了职位时才去努力工作

  有的人一生都在等自己如意的工作,戴到白发之时方诲自己执著地等待。因为世界真的很精彩,只要你肯努力,处处都有你满意的工作。
四、不要等到失败时才记起他人的忠告

  忠言逆耳利于行,良药苦口利于病。世人往往善于听信谗言,因为谗言总是美丽的,而忘了这句古话。待到自己失败时,一切如过眼云烟,烟消云散。
五、不要等到生病时才意识到生命脆弱

  生命真的很脆弱,一只蚂蚁可能死在你的脚下,只不过你没有觉察。可能你在生命的边缘徘徊,为什么不珍惜自己的生命?
六、不要等到分离时后悔没有珍惜感情

  为什么总是离别之后才懂得珍惜,因为人无完人,金无足赤。拥有一颗宽容的心,善待别人就等于善待自己。
七、不要等到有人赞赏你时才相信自己

  每个人都有自己的优点和长处,自信有时也是成功的钥匙。要等到别人的赞赏,恐怕已经太迟了,因为生命属于你只有一次,没有循环,没有往复。
八、不要等到别人指出才知道自己错了

  其实,勇于承认错误并没有人嘲笑你,反而得到别人的尊重。因为每个人都有错误,只不过有的人善于掩饰自己的错误,有的人勇于承认罢了。
九、不要等到腰缠万贯才准备帮助穷人

  助人为乐永远是一种美德,待到腰缠万贯之时,你不一定会快乐,因为你的施舍别人不一定接受。
十、不要等到临死时才发现要热爱生活

  生活真的很精彩,为什么要游戏人生。人生就像一条长河,永远没有尽头,没有止境。并不因为你的生老病死而改变。热爱生活就等于热爱

验证imp show参数

1.exp导出数据

[oracle@node1 ~]$ exp "'/ as sysdba'" owner=ECPUUM file=/tmp/ECPUUM.dmp log=/tmp/E.log

Export: Release 10.2.0.5.0 - Production on Wed Jan 18 16:32:34 2012

Copyright (c) 1982, 2007, Oracle.  All rights reserved.


Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0-64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set

About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user ECPUUM 
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user ECPUUM 
About to export ECPUUM's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export ECPUUM's tables via Conventional Path ...
. . exporting table         TAB_UUM_COMPANY_DETAIL        263 rows exported
. exporting synonyms
. exporting views
. exporting stored procedures
. exporting operators
. exporting referential integrity constraints
. exporting triggers
. exporting indextypes
. exporting bitmap, functional and extensible indexes
. exporting posttables actions
. exporting materialized views
. exporting snapshot logs
. exporting job queues
. exporting refresh groups and children
. exporting dimensions
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully without warnings.

2.创建新用户

[oracle@node1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 18 16:39:17 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options

SQL> drop user xifenfei cascade;

User dropped.

SQL> create user xifenfei identified by xff; 

User created.

SQL> grant dba to xifenfei;

Grant succeeded.

SQL> exit

3.imp+show=y导入

[oracle@node1 ~]$ imp "'/ as sysdba'" fromuser=ECPUUM touser=xifenfei \
>file=/tmp/ECPUUM.dmp log=/tmp/ECPUUM.log show=y

Import: Release 11.2.0.3.0 - Production on Wed Jan 18 16:41:52 2012

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing option

Export file created by EXPORT:V10.02.01 via conventional path
import done in ZHS16GBK character set and AL16UTF16 NCHAR character set
. importing ECPUUM's objects into XIFENFEI
 "BEGIN  "
 "sys.dbms_logrep_imp.instantiate_schema(schema_name=>SYS_CONTEXT('USERENV','"
 "CURRENT_SCHEMA'), export_db_name=>'ECP', inst_scn=>'20152169');"
 "COMMIT; END;"
 "ALTER SESSION SET CURRENT_SCHEMA= "XIFENFEI""
 "CREATE SEQUENCE "SEQ_UUM_COMPANY_ID" MINVALUE 1 MAXVALUE 999999999999999999"
 "9999999 INCREMENT BY 1 START WITH 462 CACHE 20 NOORDER NOCYCLE"
 "CREATE GLOBAL TEMPORARY TABLE "HT_TAB_UUM_USERS" ("USER_ID" NUMBER(19, 0) N"
 "OT NULL ENABLE) ON COMMIT DELETE ROWS "           
 "CREATE TABLE "TAB_UUM_COMPANY_DETAIL" ("COMPANY_ID" NUMBER(7, 0) NOT NULL E"
 "NABLE, "COMPANY_NAMEALIAS" VARCHAR2(64) NOT NULL ENABLE, "COMPANY_TYPE" NUM"
 "BER, "COMPANY_COUNTRY" NUMBER, "COMPANY_PROVICE" NUMBER, "COMPANY_CITY" NUM"
 "BER, "COMPANY_AREA" NUMBER, "COMPANY_ADDRESS" VARCHAR2(256), "COMPANY_POSTC"
 "ODE" NUMBER(6, 0), "COMPANY_PHONE" VARCHAR2(13), "COMPANY_WEBSITE" VARCHAR2"
 "(128), "COMPANY_TRADEBIG" NUMBER, "COMPANY_SIZE" NUMBER, "COMPANY_PAYMENT" "
 "NUMBER, "COMPANY_EXTEND1" VARCHAR2(32), "COMPANY_EXTEND2" VARCHAR2(32), "CO"
 "MPANY_EXTEND3" VARCHAR2(32), "COMPANY_TRADESMALL" NUMBER, "COMPANY_REG_CAPI"
 "TAL" NUMBER)  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL"
 " 65536 NEXT 1048576 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABL"
 "ESPACE "TS_PUB_BASE" LOGGING NOCOMPRESS"
. . skipping table "TAB_UUM_COMPANY_DETAIL"           
 "CREATE UNIQUE INDEX "PK_TAB_UUM_COMPANY_DETAIL" ON "TAB_UUM_COMPANY_DETAIL""
 " ("COMPANY_ID" )  PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 "
 "NEXT 1048576 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "
 ""TS_PUB_BASE" LOGGING"
 "ALTER SESSION SET CURRENT_SCHEMA= "XIFENFEI""
 "ALTER TABLE "TAB_UUM_COMPANY_DETAIL" ADD SUPPLEMENTAL LOG GROUP "GGS_TAB_UU"
 "M_COMPANY_51784" ("COMPANY_ID") ALWAYS"
 "ALTER TABLE "TAB_UUM_COMPANY_DETAIL" ADD SUPPLEMENTAL LOG GROUP "GGS_TAB_UU"
 "M_COMPANY_52725" ("COMPANY_ID") ALWAYS"
 "ALTER TABLE "TAB_UUM_COMPANY_DETAIL" ADD SUPPLEMENTAL LOG GROUP "GGS_TAB_UU"
 "M_COMPANY_52946" ("COMPANY_ID") ALWAYS"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_ID" IS  '企业ID'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_NAMEALIAS" IS  '公司名称"
 "简称'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_TYPE" IS  '公司类型:单选"
 ",选择:1 有限责任公司、2 股份有限公司、3 国有独资公司、4个人独资企业、5个体"
 "工商户、6合伙企业、7外商投资企业、8私营企业、9其他;'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_COUNTRY" IS  '公司所在地"
 ":从列表选择,分四项:国家、省份、地市、区县,其中国家一项默认值为:中国;'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_PROVICE" IS  '省'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_CITY" IS  '市'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_AREA" IS  '地区'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_ADDRESS" IS  '公司详细地"
 "址: 手工录入,100个汉字;'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_POSTCODE" IS  '邮编'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_PHONE" IS  '公司电话'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_WEBSITE" IS  '公司网址'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_SIZE" IS  '公司规模'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_PAYMENT" IS  '付款方式'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_EXTEND1" IS  '扩展字段1"
 "'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_EXTEND2" IS  '扩展字段1"
 "'"
 "COMMENT ON COLUMN "TAB_UUM_COMPANY_DETAIL"."COMPANY_EXTEND3" IS  '扩展字段3"
 "'"
. . skipping table "TAB_UUM_COMPANY_DETAIL"     
Import terminated successfully without warnings.

4.查询imp结果

[oracle@node1 ~]$ sqlplus xifenfei/xff

SQL*Plus: Release 11.2.0.3.0 Production on Wed Jan 18 16:45:10 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options

SQL> select count(*) from TAB_UUM_COMPANY;
select count(*) from TAB_UUM_COMPANY
                     *
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> select * from tab;

no rows selected

通过实验知道,show=y表示展示imp导入的时候,会执行的相关语句(不包括insert语句),而不会真正的在数据库中执行