Update hints-transact-sql-query.md

EricBuMSFT · web-flow · commit a73a3b424b02 · 2019-12-05T13:38:51.000-05:00
{ FORCE | DISABLE } SCALEOUTEXECUTION Query hint was added for SQL 2019 Big Data Clusters around the CTP 2.3 timeframe, but was never documented. Added this hint to the document
diff --git a/docs/t-sql/queries/hints-transact-sql-query.md b/docs/t-sql/queries/hints-transact-sql-query.md
@@ -86,7 +86,8 @@ Query hints specify that the indicated hints should be used throughout the query
   | EXPAND VIEWS   
   | FAST number_rows   
   | FORCE ORDER   
-  | { FORCE | DISABLE } EXTERNALPUSHDOWN  
+  | { FORCE | DISABLE } EXTERNALPUSHDOWN
+  | { FORCE | DISABLE } SCALEOUTEXECUTION
   | IGNORE_NONCLUSTERED_COLUMNSTORE_INDEX  
   | KEEP PLAN   
   | KEEPFIXED PLAN  
@@ -162,7 +163,10 @@ Specifies that the join order indicated by the query syntax is preserved during
   
 { FORCE | DISABLE } EXTERNALPUSHDOWN  
 Force or disable the pushdown of the computation of qualifying expressions in Hadoop. Only applies to queries using PolyBase. Won't push down to Azure storage.  
-  
+
+{ FORCE | DISABLE } SCALEOUTEXECUTION
+Force or disable scale out execution of PolyBase queries that are using External tables in a SQL Server 2019 Big Data Cluster. This hint will only be honored by a query using the master instance of a SQL Big Data Cluster. The scale out will occur across the Compute Pool of the Big Data cluster. 
+
 KEEP PLAN  
 Forces the Query Optimizer to relax the estimated recompile threshold for a query. The estimated recompile threshold starts an automatic recompile for the query when the estimated number of indexed column changes have been made to a table by running one of the following statements:
 
