SQL4010 - Table scan access for table &1

SQL4010
Message Text: Table scan access for table &1
Cause Text: Table scan access was used to select rows from the table. The table number refers to the relative position of this table in the query.
Recovery Text: Table scan is generally a good performing option when selecting a high percentage of rows from the table. The use of an index, however, may improve the performance of the query when selecting a low percentage of rows from the table.