Import and default values for columns

Question

Hi guys
I have a table in which there are default values for some columns. I take export of this table.
I go to another database where this table structure is already there (but default values are not set). I run the import of table with ignore=Y. It does all...import the data...create the indexes and all...but doesn't set the default values for the columns.
Shouldn't it do that also ? ignore=Y means that ignore the object creation errors and proceed with the rest of the stuff ? Or there is some problem in my understanding ?
Version 10gR2 on AIX 5.3 and using traditional export/import.
Thanks
Amardeep Sidhu

Answer 1

Hanji Sidhu Sahib.
Mein Tuhade liye eh example try kita hai.
SQL> conn simar/simar
Connected.
SQL> SQL> create table orders (
dept varchar2(20) primary key,
place varchar2(20),
intcol integer default 12
2 3 4 5
Table created.
SQL>
Inserted few values ...........+ commit.
SQL> conn simar/simar
Connected.
SQL> select * from orders;
DEPT PLACE INTCOL
SALES TORONTO 12
HR LA 12
BILLING FLORIDA 12
IT HALIFAX 5
exp simar/simar@RACDB file=exptest.dmp log=exptest.log
rac01:/software/backup>exptest.dmp log=exptest.log <
Export: Release 10.2.0.3.0 - Production on Tue May 6 23:35:58 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
Export done in WE8ISO8859P1 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 SIMAR
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user SIMAR
About to export SIMAR's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export SIMAR's tables via Conventional Path ...
. . exporting table ABC 12 rows exported
. . exporting table ORDERS 4 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.
rac01:/software/backup>strings exptest.dmp |grep -i 'create'
CREATE TABLE "ABC" ("A" VARCHAR2(10), "B" VARCHAR2(10)) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS
CREATE TABLE "ORDERS" ("DEPT" VARCHAR2(20), "PLACE" VARCHAR2(20), "INTCOL" NUMBER(*,0)) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING NOCOMPRESS
rac01:/software/backup>strings exptest.dmp |grep -i 'alter'
ALTER TABLE "ORDERS" MODIFY DEFAULT
ALTER TABLE "ORDERS" MODIFY ("INTCOL" DEFAULT 12
ALTER TABLE "ORDERS" ADD PRIMARY KEY ("DEPT") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "USERS" LOGGING ENABLE
SQL> conn simar/simar
Connected.
SQL> drop table orders;
Table dropped.
imp simar/simar@RACDB file=exptest.dmp log=imp_exptest_1.log tables='ORDERS'
rac01:/software/backup>exptest.dmp log=imp_exptest_1.log tables='ORDERS' <
Import: Release 10.2.0.3.0 - Production on Tue May 6 23:46:48 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
Export file created by EXPORT:V10.02.01 via conventional path
import done in WE8ISO8859P1 character set and AL16UTF16 NCHAR character set
. importing SIMAR's objects into SIMAR
. importing SIMAR's objects into SIMAR
. . importing table "ORDERS" 4 rows imported
Import terminated successfully without warnings.
SQL> conn / as sysdba
Connected.
SQL> set heading off;
set echo off;
Set pages 999;
set long 90000;
SQL> SQL> SQL> SQL> SQL>
SQL> select dbms_metadata.get_ddl('TABLE','ORDERS','SIMAR') from dual;
CREATE TABLE "SIMAR"."ORDERS"
( "DEPT" VARCHAR2(20),
"PLACE" VARCHAR2(20),
"INTCOL" NUMBER(*,0) DEFAULT 12,
PRIMARY KEY ("DEPT")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" 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 "USERS"
SQL>
Here the alter table statement is in the dmp file as well as in the imported table.
Regards