Return the database key marking the end of the compaction operation in a Btree or Recno database. This is generally the first key of the page where the operation stopped.

If non-null, the starting point for compaction. For a Btree or Recno database compaction starts at the smallest key greater than or equal to the starting point. For a Hash database, compaction starts in the bucket specified by the integer stored in the starting point. If null, compaction starts at the beginning of the database.

If non-null, the stopping point for compaction. For a Btree or Recno database compaction stops at the page with the smallest key greater than the stopping point. For a Hash database compaction stops in the bucket specified by the integer stored in the stopping point. If null, compaction stops at the end of the database.

If true, return pages to the filesystem when possible. If false, pages emptied as a result of compaction are placed on the free list for re-use, but never returned to the filesystem.