OCP 1Z0 053 135

135.The ADMIN_EMP table has columns EMPNO, ENAME, DEPTNO, and SAL. It has a materialized 
view EMP_MV with a materialized log and an ENAME_IDX index on the ENAME column. You need to 
perform an online table redefinition on the ADMIN_EMP table to move it from the TBS1 tablespace to the
TBS2 tablespace in the same schema. What action is required for the dependent objects when you 
perform online redefinition on the table? 
A. The materialized view should have a complete refresh performed after the online table redefinition is 
completed. 
B. The materialized view should have a fast refresh performed after the online table redefinition is 
completed. 
C. The materialized view, materialized log, and the index should be dropped and re-created after the 
online table redefinition is complete. 
D. The materialized view and materialized log should be dropped and all constraints disabled and 
re-created after the online table redefinition is complete. 
Answer: A

Results of the Redefinition Process

The following are the end results of the redefinition process:

• The original table is redefined with the columns, indexes, constraints, grants, triggers, and statistics of the interim table.

• Dependent objects that were registered, either explicitly using REGISTER_DEPENDENT_OBJECT or implicitly using COPY_TABLE_DEPENDENTS, are renamed automatically so that dependent object names on the redefined table are the same as before redefinition.

  Note:

  If no registration is done or no automatic copying is done, then you must manually rename the dependent objects.

• The referential constraints involving the interim table now involve the redefined table and are enabled.

• Any indexes, triggers, materialized view logs, grants, and constraints defined on the original table (prior to redefinition) are transferred to the interim table and are dropped when the user drops the interim table. Any referential constraints involving the original table before the redefinition now involve the interim table and aredisabled.

• Some PL/SQL objects, views, synonyms, and other table-dependent objects may become invalidated. Only those objects that depend on elements of the table that were changed are invalidated. For example, if a PL/SQL procedure queries only columns of the redefined table that were unchanged by the redefinition, the procedure remains valid. See "Managing Object Dependencies" for more information about schema object dependencies.

因materialized log是建在原表上的，现在需要在重定义后的新表上重log。所以需要同时重新刷新下物化视图的数据。