The useDFE SPARQL query hint - Amazon Neptune
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China.

The useDFE SPARQL query hint

Use this query hint to disable use of the DFE for executing the query. Because the default value of this hint is true, there is no need to include the hint unless you don't want the query to be executed by the DFE.

Note

If you use this query hint when the DFE is not enabled in Lab Mode, the hint is treated as a regular triple pattern.

Example:

PREFIX : <https://example.com/> PREFIX hint: <http://aws.amazon.com/neptune/vocab/v01/QueryHints#> SELECT ?john ?jane { hint:Query hint:useDFE false . ?person1 :name "Jane" . ?person1 :likes ?person2 . ?person2 :name "John" . ?person2 :likes ?person1 . }