RE: Question re Physical and logical standby

From: <>
Date: Wed, 15 Oct 2008 08:53:54 +0100
Message-ID: <>


The 'alter database add supplemental log data (primary key, unique index) columns;' ensure that Oracle can identify each row uniquely on both sides. I am reasonably certain that you only run this command on the primary side but have not double-checked the documentation recently. The build dictionary command provides Oracle with full dictionary (object) names on the standby side, otherwise it would just use object id to identify tables etc.
These are different commands with different functions. John

John Hallas
Oracle DBA
Wm Morrison Supermarkets PLC
Mobile: 07876 790540

-----<> wrote: -----

Yes it is but still my question, is this a different way of building the dictionary and in fact is that what the command

SQL> alter database add supplemental log data (primary key, unique index) columns;

Is doing? Also, after studying a bit more it appears that if this is done on the primary prior to building the standby then the change will be propagated with the backup. If it is done after the standby has been built then it must be done on both the primary and the standby. Is that correct?

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Received on Wed Oct 15 2008 - 02:53:54 CDT

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