Objects that are specified in TABLE and MAP statements are of MAPPED scope. Extraction and replication instructions in those statements apply to both data (DML) and DDL on the specified objects, unless override rules are applied.

For objects in TABLE and MAP statements, the DDL operations listed in the following table are supported.

^Footnote 1 TABLE and MAP do not support some special characters that could be used in an object name affected by these operations. Objects with non-supported special characters are supported by the scopes of UNMAPPED and OTHER.

^Footnote 2

Applies to COMMENT ON TABLE, COMMENT ON COLUMN

^Footnote 3

Includes AS SELECT

^Footnote 4

Table name must be qualified with schema name.

For Extract, MAPPED scope marks an object for DDL capture according to the instructions in the TABLE statement. For Replicat, MAPPED scope marks DDL for replication and maps it to the object specified by the schema and name in the TARGET clause of the MAP statement. To perform this mapping, Replicat issues ALTER SESSION to set the schema of the Replicat session to the schema that is specified in the TARGET clause. If the DDL contains unqualified objects, the schema that is assigned on the target depends on circumstances described in Understanding DDL Scopes.

Assume the following TABLE and MAP statements:

Extract (source)

TABLE fin.expen;
TABLE hr.tab*;

Replicat (target)

MAP fin.expen, TARGET fin2.expen2;
MAP hr.tab*, TARGET hrBackup.bak_*;

Also assume a source DDL statement of:

ALTER TABLE fin.expen ADD notes varchar2(100);

In this example, because the source table fin.expen is in a MAP statement with a TARGET clause that maps to a different schema and table name, the target DDL statement becomes:

ALTER TABLE fin2.expen2 ADD notes varchar2(100);

Likewise, the following source and target DDL statements are possible for the second set of TABLE and MAP statements in the example:

Source:

CREATE TABLE hr.tabPayables ... ;

Target:

CREATE TABLE hrBackup.bak_tabPayables ...;

When objects are of MAPPED scope, you can omit their names from the DDL configuration parameters, unless you want to refine their DDL support further. If you ever need to change the object names in TABLE and MAP statements, the changes will apply automatically to the DDL on those objects.

If you include an object in a TABLE statement, but not in a MAP statement, the DDL for that object is MAPPED in scope on the source but UNMAPPED in scope on the target.