I have a table EMP which i created a materialized view log (MLOG$_EMP) for replication purposes. The materialized view log is based on the primary-key EMPNO.
SQL> alter session set nls_date_format ="DD-MON-YYYY HH:MI:SSAM";
Session altered.
SQL> SELECT EMPNO,SURNAME FROM EMP WHERE EMPNO='0001';
EMPNO SURNAME
------- ---------
0001 SINFUENTE
SQL> SELECT * FROM MLOG$_EMP WHERE EMPNO='0001';
no rows selected
SQL> UPDATE EMP SET SURNAME=SURNAME WHERE EMPNO='0001';
1 row updated.
SQL> SELECT * FROM MLOG$_EMP WHERE EMPNO='0001';
EMPNO SNAPTIME$$ D O CHANGE_VECTOR$$
-------- ---------------------- - - ----------------
0001 01-JAN-4000 12:00:00AM U U 08000000000000
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