When dealing with large result sets, DB2 optimizes cursor positioning by ________.
- Caching entire result set
- Indexing result set
- Limiting cursor movement
- Prefetching rows
DB2 optimizes cursor positioning when dealing with large result sets by prefetching rows. Prefetching involves fetching multiple rows from the result set into memory before they are actually requested, which reduces the overhead of fetching rows one by one and enhances the performance of cursor operations.
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