SQL4011 - Index scan-key row positioning used on table &1

SQL4011
Message Text: Index scan-key row positioning used on table &1
Cause Text: Index scan-key row positioning is defined as applying selection against the index to position directly to ranges of keys that match some or all of the selection criteria. Index scan-key row positioning only processes a subset of the keys in the index and is a good performing option when selecting a small percentage of rows from the table.

The table number refers to the relative position of this table in the query.
Recovery Text: Refer to Data access on DB2 UDB for iSeries: data access paths and methods for more information about index scan-key row positioning.