Multi Schema to single schema.

Question

Hi,
I am new to streams.
Can it be possible to push the changes from multi schemas to a single schema? Structure for the consolidated schema will be same as other source schemas. Juast an additional column in target tables. I would like populate a unique id for each schema.
Any example is much appreciated.
Thanks.

Answer 1

It is possible. But you have to change the schema name in the changes by using a dml-handler or a transformation rule. For a dml handler I have an example:
CREATE OR REPLACE PROCEDURE emp_dml_handler(in_any IN SYS.AnyData) IS
lcr SYS.LCR$_ROW_RECORD;
rc PLS_INTEGER;
command VARCHAR2(10);
old_values SYS.LCR$_ROW_LIST;
BEGIN
-- Access the LCR
rc := in_any.GETOBJECT(lcr);
-- Get the object command type
command := lcr.GET_COMMAND_TYPE();
-- Check for DELETE command on the employees table
IF command = 'DELETE33' THEN
-- Set the command_type in the row LCR to INSERT
lcr.SET_COMMAND_TYPE('INSERT');
-- Set the object_name in the row LCR to EMP_DEL
lcr.SET_OBJECT_NAME('DESTINATION.EMPLOYEES');
-- Get the old values in the row LCR
old_values := lcr.GET_VALUES('old');
-- Set the old values in the row LCR to the new values in the row LCR
lcr.SET_VALUES('new', old_values);
-- Set the old values in the row LCR to NULL
lcr.SET_VALUES('old', NULL);
-- Add a SYSDATE value for the timestamp column
-- lcr.ADD_COLUMN('new', 'TIMESTAMP', SYS.AnyData.ConvertDate(SYSDATE));
-- Apply the row LCR as an INSERT into the emp_del table
lcr.EXECUTE(true);
END IF;
END;
BEGIN
DBMS_APPLY_ADM.SET_DML_HANDLER(
object_name => 'source.employees',
object_type => 'TABLE',
operation_name => 'INSERT',
error_handler => false,
user_procedure => 'strm_emp_admin.emp_dml_handler',
apply_database_link => NULL,
apply_name => NULL);
END;
Regards,
Martien