1z0-062 Latest Exam Braindumps
Question 13: Examine the following commands for redefining a table with Virtual Private Database (VPD)policies:
Which two statements are true about redefining the table? (Choose two.)
A. All the triggers for the table are disabled without changing any of the column names or column
types in the table.
B. VPD policies are copied from the original table to the new table during online redefinition.
C. The primary key constraint on the EMPLOYEES table is disabled during redefinition.
D. You must copy the VPD policies manually from the original table to the new table during online
redefinition.
Correct Answer: B,C
Explanation
C (not D): CONS_VPD_AUTO
Used to indicate to copy VPD policies automatically
* DBMS_RLS.ADD_POLICY
/ The DBMS_RLS package contains the fine-grained access control administrative interface, which is
used to implement Virtual Private Database (VPD).DBMS_RLS is available with the Enterprise Edition
only.
Note:
* CONS_USE_PK and CONS_USE_ROWID are constants used as input to the "options_flag" parameter
in both the START_REDEF_TABLE Procedure and CAN_REDEF_TABLE Procedure. CONS_USE_ROWID is
used to indicate that the redefinition should be done using rowids while CONS_USE_PK implies that
the redefinition should be done using primary keys or pseudo-primary keys (which are unique keys
with all component columns having NOT NULL constraints).
* DBMS_REDEFINITION.START_REDEF_TABLE
To achieve online redefinition, incrementally maintainable local materialized views are used. These
logs keep track of the changes to the master tables and are used by the materialized views during
refresh synchronization.
* START_REDEF_TABLE Procedure
Prior to calling this procedure, you must manually create an empty interim table (in the same schema
as the table to be redefined) with the desired attributes of the post-redefinition table, and then call
this procedure to initiate the redefinition.
