What are the advantages and disadvantages of Oracle for…

Advantages of mandatory index usage:

1. Improving query performance: Indexes can speed up data retrieval, enforcing index usage can ensure queries fully leverage the advantages of indexes, enhancing query performance.
2. Controlling query plans: Forcing the use of indexes can allow the database optimizer to choose a more appropriate query plan, preventing performance degradation due to incorrect query plans.

Disadvantages of forcing the use of indexes:

1. Maintaining costs increase: Mandating index usage could lead to higher maintenance costs for indexes, as the database has to frequently update the data structure of the indexes.
2. Increasing disk space usage: Enforcing the use of indexes may lead to an increase in disk space usage as indexes require additional storage space.
3. Forcing the use of indexes can lead to performance degradation, especially if the index selection is inappropriate or data distribution is uneven, which can result in degraded query performance.
4. Forcing the use of indexes may result in lock contention, as multiple queries may simultaneously access the same index, leading to lock conflicts.