The CompactData type exposes the following members.
If no Transaction parameter was specified, the number of deadlocks which occurred.
The number of empty hash buckets that were found the compaction phase.
The database key marking the end of the compaction operation. This is generally the first key of the page where the operation stopped and is only non-null if returnEnd was true.
The number of levels removed from the Btree or Recno database during the compaction phase.
The number of database pages reviewed during the compaction phase.
The number of database pages freed during the compaction phase.
The number of database pages returned to the filesystem.