sp_Blitz: Add check for Query Store Wait Stats being turned off

Documentation/sp_Blitz_Checks_by_Priority.md

@@ -6,8 +6,8 @@ Before adding a new check, make sure to add a Github issue for it first, and hav
 
 If you want to change anything about a check - the priority, finding, URL, or ID - open a Github issue first. The relevant scripts have to be updated too.
 
-CURRENT HIGH CHECKID: 261.
-If you want to add a new one, start at 262.
+CURRENT HIGH CHECKID: 262.
+If you want to add a new one, start at 263.
 
 | Priority | FindingsGroup | Finding | URL | CheckID |
 |----------|-----------------------------|---------------------------------------------------------|------------------------------------------------------------------------|----------|
@@ -247,6 +247,7 @@ If you want to add a new one, start at 262.
 | 200 | Performance | Non-Dynamic Memory | https://www.BrentOzar.com/go/memory | 190 |
 | 200 | Performance | Old Compatibility Level | https://www.BrentOzar.com/go/compatlevel | 62 |
 | 200 | Performance | Query Store Disabled | https://www.BrentOzar.com/go/querystore | 163 |
+| 200 | Performance | Query Store Wait Stats Disabled | https://www.sqlskills.com/blogs/erin/query-store-settings/ | 262 |
 | 200 | Performance | Snapshot Backups Occurring | https://www.BrentOzar.com/go/snaps | 178 |
 | 200 | Performance | User-Created Statistics In Place | https://www.BrentOzar.com/go/userstats | 122 |
 | 200 | Performance | SSAS/SSIS/SSRS Installed | https://www.BrentOzar.com/go/services | 224 |

sp_Blitz.sql

@@ -6758,6 +6758,37 @@ IF @ProductVersionMajor >= 10
 									  AND N''?'' NOT IN (''master'', ''model'', ''msdb'', ''tempdb'', ''DWConfiguration'', ''DWDiagnostics'', ''DWQueue'', ''ReportServer'', ''ReportServerTempDB'') OPTION (RECOMPILE)';
 							END;
 
+						IF NOT EXISTS ( SELECT  1
+										FROM    #SkipChecks
+										WHERE   DatabaseName IS NULL AND CheckID = 262 )
+                            AND EXISTS(SELECT * FROM sys.all_objects WHERE name = 'database_query_store_options')
+							AND  @ProductVersionMajor > 13 /* The relevant column only exists in 2017+ */
+							BEGIN
+
+								IF @Debug IN (1, 2) RAISERROR('Running CheckId [%d].', 0, 1, 262) WITH NOWAIT;
+
+								EXEC dbo.sp_MSforeachdb 'USE [?];
+                                        SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+			                            INSERT INTO #BlitzResults
+			                            (CheckID,
+			                            DatabaseName,
+			                            Priority,
+			                            FindingsGroup,
+			                            Finding,
+			                            URL,
+			                            Details)
+		                              SELECT TOP 1 262,
+		                              N''?'',
+		                              200,
+		                              ''Performance'',
+		                              ''Query Store Wait Stats Disabled'',
+		                              ''https://www.sqlskills.com/blogs/erin/query-store-settings/'',
+		                              (''The new SQL Server 2017 Query Store feature for tracking wait stats has not been enabled on this database. It is very useful for tracking wait stats at a query level.'')
+		                              FROM [?].sys.database_query_store_options
+									  WHERE desired_state <> 0
+									  AND wait_stats_capture_mode = 0 
+									  OPTION (RECOMPILE)';
+							END;
 
 						IF @ProductVersionMajor = 13 AND @ProductVersionMinor < 2149 --2016 CU1 has the fix in it
 							AND NOT EXISTS ( SELECT  1