For Oracle warm standby, the replication definitions are automatically created by the Replication Agent at initialization, and have these attributes:
Mappings from Oracle datatypes to Replication Server user-defined datatypes (UDD) are provided.
By default, tables with clob/blob columns are defined with the always_replicate clause. If auto_create_repdefs is set to “on”, then clob/blob columns are defined with replicate_if_change clause.
The always_replicate and replicate_if_change are
clauses for creating replication definitions.
The replication definitions are created with the send standby replication definition columns clause.
If you are replicating from a warm standby primary environment to a replicate database outside the warm standby environment, you may want to create a new replication definition for each table to be replicated for these cases to:
Provide mappings from Oracle datatypes to Replication Server UDD. See Appendix A, “Datatype Translation and Mapping” for Replication Server datatype names for Oracle.
Use replicate_if_change clause for table with clob/blob column.
Include the send standby all columns clause, if a database level subscription is used to subscribe to the non-warm standby database.
Specify the primary and replicate function owner. Customize the function string to specify the target (standby database) function owner information for user procedures.
For example, if a user table TB1 is defined with one of the columns “COL5”as Oracle datatype date, to replicate the column to standby database as expected, the user must create a replication definition as shown:
create replication definition rep1 with primary at ordb.pdb with all tables named 'USER1'.'TB1' ( "COL1" int, "COL2" int, "COL3" int, "COL4" char(255), "COL5" rs_oracle_datetime, ) primary key( "COL1","COL2","COL3") searchable columns( "COL1","COL2","COL3","COL5") send standby replication definition columns replicate minimal columns go
In this example, the clause send standby replication definition columns in create replication definition command specifies that this replication definition can be used for a subscribed database as well as for a standby database.
