Fix multiple plan query

Add DatabaseName to group by and join.

Also discovered that this particular update was running twice, so remove the second one. This marks the first time BlitzCache has ever gotten shorter.

Sorry if that screws up any metrics for you 😃

Closes #2653

Author: erikdarling

sp_BlitzCache.sql

@@ -2810,12 +2810,15 @@ SET     NumberOfDistinctPlans = distinct_plan_count,
 FROM (
         SELECT  COUNT(DISTINCT QueryHash) AS distinct_plan_count,
                 COUNT(QueryHash) AS number_of_plans,
-                QueryHash
+                QueryHash,
+				DatabaseName
         FROM    ##BlitzCacheProcs
 		WHERE SPID = @@SPID
-        GROUP BY QueryHash
+        GROUP BY QueryHash,
+		         DatabaseName
 ) AS x
 WHERE ##BlitzCacheProcs.QueryHash = x.QueryHash
+AND   ##BlitzCacheProcs.DatabaseName = x.DatabaseName
 OPTION (RECOMPILE) ;
 
 -- query level checks
@@ -3664,22 +3667,7 @@ END;
 
 
 /* END Testing using XML nodes to speed up processing */
-RAISERROR(N'Gathering additional plan level information', 0, 1) WITH NOWAIT;
-WITH XMLNAMESPACES('http://schemas.microsoft.com/sqlserver/2004/07/showplan' AS p)
-UPDATE ##BlitzCacheProcs
-SET NumberOfDistinctPlans = distinct_plan_count,
-    NumberOfPlans = number_of_plans,
-    plan_multiple_plans = CASE WHEN distinct_plan_count < number_of_plans THEN number_of_plans END 
-FROM (
-SELECT COUNT(DISTINCT QueryHash) AS distinct_plan_count,
-       COUNT(QueryHash) AS number_of_plans,
-       QueryHash
-FROM   ##BlitzCacheProcs
-WHERE SPID = @@SPID
-GROUP BY QueryHash
-) AS x
-WHERE ##BlitzCacheProcs.QueryHash = x.QueryHash 
-OPTION (RECOMPILE);
+
 
 /* Update to grab stored procedure name for individual statements */
 RAISERROR(N'Attempting to get stored procedure name for individual statements', 0, 1) WITH NOWAIT;