How to resolve the issue of invalidating partitioned index when deleting in Oracle?

After Oracle deletes a partition, the partition index may become invalid. This issue can be resolved by following these methods:

1. To address the issue of invalidation, you can recreate the index by using the CREATE INDEX statement for partitioned indexes.
2. Recreate table: If a partition index becomes invalid and cannot be repaired, consider recreating the table. This involves exporting data from the old table to a new one and then recreating the index to resolve the issue.
3. Analyze tables and indexes: Use the “ANALYZE TABLE” and “ANALYZE INDEX” statements to reanalyze tables and indexes. This will update statistics, help Oracle optimize query plans, and possibly resolve index inefficiencies.
4. Use the DBMS_STATS package: Utilize the relevant procedures within the DBMS_STATS package to gather statistics again. For example, you can use the DBMS_STATS.GATHER_TABLE_STATS procedure to re-collect statistical information for tables.
5. Utilize bitmap indexing: If the issue of index failure is related to the uneven distribution of data in partitioned tables, consider using bitmap indexing. Bitmap indexing can more effectively handle situations of uneven data distribution.
6. Rewriting the query may help resolve the issue if the problem with index inefficiency is due to the query statement. Optimize the structure and logic of the query to make use of partitioned indexes.

The above are some common solutions, the specific method should be determined based on the specific situation. If none of the above methods can solve the problem, further inspection of database configuration and performance tuning may be necessary.