oracle中imp导入参数show=y 详解
在imp的帮助中: SHOW just list file contents (N),默认为N。
在imp的帮助中: SHOW just list file contents (N),默认为N。代码如下 | 复制代码 |
在imp的帮助中: SHOW just list file contents (N),默认为N。 下面通过实验说明2点: 1.show=y 可以显示dmp文件中创建对象的语句。 2.show=y 就如同oracle说的那样, just list file contents,这里不进行导入操作。 准备实验环境: 1.创建用户,并赋权: SQL> create user testshow identified by a123; User created SQL> grant connect,resource to testshow; Grant succeeded SQL> grant create synonym to testshow 2.创建对象: SQL> create table test (id number,name varchar2(20)); Table created SQL> create synonym emp for scott.emp; Synonym created 3.查看对象是否创建成功: SQL> select count(*) from emp; 开始实验: 1.导出testshow用户的所有对象: C:Usersyafeishi>exp system/dang file=testshow.dmp compress=n owner=testshow 2.删除testshow下的test表和emp同名: SQL> drop table test; Table dropped SQL> select * from test; select * from test |
ORA-00942: 表或视图不存在
代码如下 | 复制代码 |
SQL> drop synonym emp; Synonym dropped SQL> select count(*) from emp; select count(*) from emp ORA-00942: 表或视图不存在 3.show=y 进行导入操作 |
C:Usersyafeishi>imp system/dang file=testshow.dmp log=testshow.log show=y from
user=testshow touser=testshow
Import: Release 10.2.0.3.0 - Production on 星期一 8月 27 13:20:45 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
连接到: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
经由常规路径由 EXPORT:V10.02.01 创建的导出文件
已经完成 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集中的导入
. 正在将 TESTSHOW 的对象导入到 TESTSHOW
代码如下 | 复制代码 |
"BEGIN " "sys.dbms_logrep_imp.instantiate_schema(schema_name=>SYS_CONTEXT('USERENV','" "CURRENT_SCHEMA'), export_db_name=>'ORCL.REGRESS.RDBMS.DEV.US.ORACLE.COM', i" "nst_scn=>'11274324817182');" "COMMIT; END;" "ALTER SESSION SET CURRENT_SCHEMA= "TESTSHOW"" "CREATE TABLE "TEST" ("ID" NUMBER, "NAME" VARCHAR2(20)) PCTFREE 10 PCTUSED " "40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUP" "S 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS" . . 正在跳过表 "TEST" "ALTER SESSION SET CURRENT_SCHEMA= "TESTSHOW"" "CREATE SYNONYM "EMP" FOR "SCOTT"."EMP"" |
成功终止导入, 没有出现警告。
可以看到日志打出了创建对象的语句,证明了第一点。
再查看库中对象是否导入:
代码如下 | 复制代码 |
SQL> select * from test; select * from test |
ORA-00942: 表或视图不存在
代码如下 | 复制代码 |
SQL> select count(*) from emp; select count(*) from emp |
ORA-00942: 表或视图不存在
看到对象并没有导入,证明了第二点。
4.show=n 导入
代码如下 | 复制代码 |
C:Usersyafeishi>imp system/dang file=testshow.dmp log=testshow.log show=n igno re=y fromuser=testshow touser=testshow Import: Release 10.2.0.3.0 - Production on 星期一 8月 27 13:21:35 2012 Copyright (c) 1982, 2005, Oracle. All rights reserved. 连接到: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options |
经由常规路径由 EXPORT:V10.02.01 创建的导出文件
已经完成 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集中的导入
. 正在将 TESTSHOW 的对象导入到 TESTSHOW
. . 正在导入表 "TEST"导入了 0 行
成功终止导入, 没有出现警告。
代码如下 | 复制代码 |
SQL> select * from test; ID NAME ---------- -------------------- SQL> select count(*) from emp; COUNT(*) ---------- 16 对象也导入进来了。 ---EOF |

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