EXPDP with Transform option

Question

Hi,
I have taken a dump using expdp tool with the following syntax:
expdp joy/joy@db1 directory=DATA_PUMP_DIR dumpfile=joy_nodata.dmp logfile=joy_nodata.log schemas=joy content=metadata_only
While importing the dump to another DB I have used the following syntax:
impdp joy/joy@db3 directory=TEST_DUMP dumpfile=joy_nodata.dmp logfile=joy_nodata.log transform=segment_attributes:n remap_schema=joy:joy
As per the options used with impdp the table script should exclude all storage, tablespace, logging and partitioning clauses mentioned at the source table. But I can see that the tables are imported with storage, tablespce and logging options.
Source DB information (EXPDP):
DB: 10.2.0.3 64 bit
Platform: UNIX
Target DB information(IMPDP):
DB: 10.2.0.1 64 bit
Platform: Linux
Thanks for your valuable time.
Regards,
Joy

Answer 1

Hi,
As per the options used with impdp the table script should exclude all storage, tablespace, logging and partitioning clauses mentioned at the source table.The existing/actual storage values will be discarded and the table will have all the default values for the storage.
Example -
SQL>  CREATE TABLE "SCOTT"."EMP_TEST"
  2    (    "EMPNO" NUMBER(4,0) NOT NULL ENABLE,
  3         "ENAME" VARCHAR2(15),
  4         "JOB" VARCHAR2(9),
  5         "MGR" NUMBER(4,0),
  6         "HIREDATE" DATE,
  7         "SAL" NUMBER(7,2),
  8         "COMM" NUMBER(7,2),
  9         "DEPTNO" NUMBER(2,0),
10          PRIMARY KEY ("EMPNO")
11   USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
12   STORAGE(*INITIAL* *125829120* *NEXT* *9437184* MINEXTENTS 1 MAXEXTENTS 2147483645
13   PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
14   TABLESPACE "SYSTEM"  ENABLE
15    ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
16   STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
17   PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
18   TABLESPACE "SYSTEM" ;
Table created.
SQL>
NOTE - Above in the create table sql , *the storage INITIAL is set to "120MB" and NEXT to "9MB"*I take the export of the above table and then import using table_exists_action=replace
D:\>expdp directory=DATA_PUMP_DIR dumpfile=emp_test.dmp logfile=emp_test.log tables=scott.emp_test
Export: Release 10.2.0.4.0 - Production on Wednesday, 03 November, 2010 12:01:05
Copyright (c) 2003, 2007, Oracle.  All rights reserved.
Username: / as sysdba
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYS"."SYS_EXPORT_TABLE_01":  /******** AS SYSDBA directory=DATA_PUMP_DIR dumpfile=emp_test.dmp logfile=emp_test.log tables=scott.emp_test
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 0 KB
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
. . exported "SCOTT"."EMP_TEST"                              0 KB       0 rows
Master table "SYS"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
Dump file set for SYS.SYS_EXPORT_TABLE_01 is:
  C:\ORACLE10\DB_1\RDBMS\LOG\EMP_TEST.DMP
Job "SYS"."SYS_EXPORT_TABLE_01" successfully completed at 12:01:55
D:\>impdp directory=DATA_PUMP_DIR dumpfile=emp_test.dmp logfile=emp_test_imp.log transform=segment_attributes:n full=y table_exists_action=replace
Import: Release 10.2.0.4.0 - Production on Wednesday, 03 November, 2010 12:20:49
Copyright (c) 2003, 2007, Oracle.  All rights reserved.
Username: / as sysdba
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SYS"."SYS_IMPORT_FULL_02" successfully loaded/unloaded
Starting "SYS"."SYS_IMPORT_FULL_02":  /******** AS SYSDBA directory=DATA_PUMP_DIR dumpfile=emp_test.dmp logfile=emp_test_imp.log transform=segment_attributes:n full=y table_exists_action=replace
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "SCOTT"."EMP_TEST"                              0 KB       0 rows
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Job "SYS"."SYS_IMPORT_FULL_02" successfully completed at 12:21:19
D:\>
D:\>
D:\>After import check the values of INITIAL and NEXT storage clause now -
12:21:45 SQL> select DBMS_METADATA.GET_DDL('TABLE','EMP_TEST','SCOTT') from dual;
  CREATE TABLE "SCOTT"."EMP_TEST"
   (    "EMPNO" NUMBER(4,0) NOT NULL ENABLE,
        "ENAME" VARCHAR2(15),
        "JOB" VARCHAR2(9),
        "MGR" NUMBER(4,0),
        "HIREDATE" DATE,
        "SAL" NUMBER(7,2),
        "COMM" NUMBER(7,2),
        "DEPTNO" NUMBER(2,0),
         PRIMARY KEY ("EMPNO")
  USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
  STORAGE(*INITIAL 65536 NEXT 1048576* MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
  TABLESPACE "SYSTEM"  ENABLE
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
  TABLESPACE "SYSTEM" ;HTH
Anand