Revert Q13

Author: GLaDAP

mssql/queries/interactive-complex-13.sql

@@ -1,29 +1,14 @@
-
--- SELECT levels
---      , PersonId
---      , Friends
---   FROM (SELECT Person1.personId AS PersonId
---              , STRING_AGG(Person2.personId, ';') WITHIN GROUP (GRAPH PATH) AS Friends
---              , LAST_VALUE(Person2.personId) WITHIN GROUP (GRAPH PATH) AS LastNode
---              , COUNT(Person2.personId) WITHIN GROUP (GRAPH PATH) AS levels
--- 	      FROM Person AS Person1
---              , Person_knows_Person FOR PATH AS fo
---              , Person FOR PATH AS Person2
--- 	     WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2)+))
--- 	       AND Person1.personId = :person1Id
---      ) AS Q
---  WHERE Q.LastNode = :person2Id
- 
-DECLARE @trustedPaths as table
-(
-    Id bigint,
-    OrderDiscovered int,
-    Path varchar(MAX)
-)
-
-INSERT INTO @trustedPaths
-EXEC dbo.knows_Breadth_First :person1Id, :person2Id;
-
-SELECT TOP(1) OrderDiscovered, Id, Path
-  FROM @trustedPaths
-  ORDER BY OrderDiscovered ASC;
+SELECT levels
+     , PersonId
+     , Friends
+  FROM (SELECT Person1.personId AS PersonId
+             , STRING_AGG(Person2.personId, ';') WITHIN GROUP (GRAPH PATH) AS Friends
+             , LAST_VALUE(Person2.personId) WITHIN GROUP (GRAPH PATH) AS LastNode
+             , COUNT(Person2.personId) WITHIN GROUP (GRAPH PATH) AS levels
+	      FROM Person AS Person1
+             , Person_knows_Person FOR PATH AS fo
+             , Person FOR PATH AS Person2
+	     WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2)+))
+	       AND Person1.personId = :person1Id
+     ) AS Q
+ WHERE Q.LastNode = :person2Id