Which two partitioned table maintenance operations support asynchronous Global Index
Maintenance in Oracle database 12c?
A.
ALTER TABLE SPLIT PARTITION
B.
ALTER TABLE MERGE PARTITION
C.
ALTER TABLE TRUNCATE PARTITION
D.
ALTER TABLE ADD PARTITION
E.
ALTER TABLE DROP PARTITION
F.
ALTER TABLE MOVE PARTITION
Explanation:
Asynchronous Global Index Maintenance for DROP and TRUNCATE PARTITION
This feature enables global index maintenance to be delayed and decoupled from a DROP and
TRUNCATE partition without making a global index unusable. Enhancements include faster
DROP and TRUNCATE partition operations and the ability to delay index maintenance to off-peak
time.
Reference: Oracle Database VLDB and Partitioning Guide 12c
Answer C, E
The maintenance of global indexes can be decoupled from the DROP and TRUNCATE PARTITION operation and delayed to off-peak time without making the global index unusable. The advantage is that the original DROP and TRUNCATE PARTITION operation can proceed faster because the index maintenance occurs later.
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/12c/Partitioning/12c_parti.html
CE