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  Oracle Replication Tips by Burleson

Defining Oracle replication Site Priority

The site priority conflict resolution method uses a column value to determine replication conflict priority.  Before we start, we need to stop replication activities for the group (this is known as a quiesce of the replication group).

We define another column in the pubs.sales table that will contain an identifier for the site that created the transaction.  Next, we add a trigger to insert a site identifier (usually the database global name). We then need to define the site priorities, using the stored procedure dbms_repcat.define_site_priority. Finally, create the column group and define the conflict resolution method.

First, we need to stop replication as seen here:


For this example, we added the SALES.SALES_SP column (varchar2(30)) to use for the site data (an example of adding a column to a replicated table was shown earlier in this chapter).  Next we need to add the trigger.

create trigger SALES_SP_TG
before insert or update

This is an excerpt from Oracle Replication By Rampant TechPress (only $19.95).  You can click here to order a copy and get instant access to the code depot:

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