RE: default constraint updating existing rows
Date: Tue, 16 Dec 2008 13:43:45 -0500
Try splitting the "alter table" into two different statements.
Alter table test add (b int);
Alter table test modify (b int default 3);
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Harvinder Singh Sent: Tuesday, December 16, 2008 1:22 PM To: oracle-l_at_freelists.org
Subject: default constraint updating existing rows
We are adding a column with default constraint and we only want it to apply to new rows but it is updating existing rows even though column allows null. I am using the following test:
SQL> create table test (a int);
SQL> insert into test values(1);
1 row created.
SQL> insert into test values(2);
1 row created.
SQL> alter table test add b int default 3;
SQL> select * from test;
1 3 2 3 SQL> desc test Name Null? Type ----------------------------------------- -------- -------------- A NUMBER(38) B NUMBER(38)
Is there any way to add new column with default constraint without updating existing rows?
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http://www.freelists.org/webpage/oracle-l Received on Tue Dec 16 2008 - 12:43:45 CST