In the documentation for the RUNSTATS command, the last paragraph of the "Usage Notes" has incorrect information.
The last paragraph currently states what happens when inconsistencies are found when running the RUNSTATS command with and without distribution or index statistics. The statistics that are dropped or retained are not stated correctly. What follows are the correct statements about what happens.
If you issue RUNSTATS on a table, then previously collected distribution statistics are dropped. If you issue RUNSTATS on indexes only, then previously collected distribution statistics are retained.