feat(inputs.sqlserver): Add persistent version store metrics

plugins/inputs/sqlserver/README.md

@@ -450,6 +450,7 @@ ensure to check additional setup section in this documentation.
 - SQLServerAvailabilityReplicaStates: Collects availability replica state information from `sys.dm_hadr_availability_replica_states` for a High Availability / Disaster Recovery (HADR) setup
 - SQLServerDatabaseReplicaStates: Collects database replica state information from `sys.dm_hadr_database_replica_states` for a High Availability / Disaster Recovery (HADR) setup
 - SQLServerRecentBackups: Collects latest full, differential and transaction log backup date and size from `msdb.dbo.backupset`
+- SQLServerPersistentVersionStore: Collects persistent version store information from `sys.dm_tran_persistent_version_store_stats` for databases with Accelerated Database Recovery enabled
 
 ### Output Measures
 

plugins/inputs/sqlserver/sqlserver.go

@@ -151,6 +151,8 @@ func (s *SQLServer) initQueries() error {
 		queries["SQLServerDatabaseReplicaStates"] =
 			Query{ScriptName: "SQLServerDatabaseReplicaStates", Script: sqlServerDatabaseReplicaStates, ResultByRow: false}
 		queries["SQLServerRecentBackups"] = Query{ScriptName: "SQLServerRecentBackups", Script: sqlServerRecentBackups, ResultByRow: false}
+		queries["SQLServerPersistentVersionStore"] =
+			Query{ScriptName: "SQLServerPersistentVersionStore", Script: sqlServerPersistentVersionStore, ResultByRow: false}
 	} else {
 		// If this is an AzureDB instance, grab some extra metrics
 		if s.AzureDB {

plugins/inputs/sqlserver/sqlserverqueries.go

@@ -15,6 +15,7 @@ import (
 //   - 1300 --> SQL Server 2016
 //   - 1400 --> SQL Server 2017
 //   - 1500 --> SQL Server 2019
+//   - 1600 --> SQL Server 2022
 
 // Thanks Bob Ward (http://aka.ms/bobwardms)
 // and the folks at Stack Overflow
@@ -1445,3 +1446,36 @@ LEFT JOIN BackupsWithSize bd ON (d.name = bd.[Database] AND (bd.Type = 'Differen
 LEFT JOIN BackupsWithSize bt ON (d.name = bt.[Database] AND (bt.Type = 'Transaction Log' OR bt.Type IS NULL))
 WHERE d.name <> 'tempdb' AND d.source_database_id IS NULL
 `
+
+// Collects persistent version store information from `sys.dm_tran_persistent_version_store_stats` for Databases where Accelerated Database Recovery is enabled.
+// ADR was added in SQL Server 2019
+const sqlServerPersistentVersionStore string = `
+SET DEADLOCK_PRIORITY -10;
+IF SERVERPROPERTY('EngineEdition') NOT IN (2,3,4) BEGIN /*NOT IN Standard,Enterpris,Express*/
+    DECLARE @ErrorMessage AS nvarchar(500) = 'Telegraf - Connection string Server:'+ @@ServerName + ',Database:' + DB_NAME() +' is not a SQL Server Standard,Enterprise or Express. Check the database_type parameter in the telegraf configuration.';
+    RAISERROR (@ErrorMessage,11,1)
+    RETURN
+END;
+
+DECLARE
+
+    @MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
+
+IF @MajorMinorVersion >= 1500 BEGIN
+    SELECT
+		'sqlserver_persistent_version_store_stats' AS [measurement]
+		,REPLACE(@@SERVERNAME,'\',':') AS [sql_instance]
+		,db_name(pvs.database_id) as [database_name]
+		,FILEGROUP_NAME(pvs.pvs_filegroup_id) as [filegroup_name]
+		,d.snapshot_isolation_state_desc
+		,pvs.persistent_version_store_size_kb
+		,pvs.online_index_version_store_size_kb
+		,pvs.current_aborted_transaction_count
+		,pvs.pvs_off_row_page_skipped_low_water_mark
+		,pvs.pvs_off_row_page_skipped_min_useful_xts
+	FROM sys.dm_tran_persistent_version_store_stats pvs
+	INNER JOIN sys.databases d
+		on d.database_id = pvs.database_id
+	    and d.is_accelerated_database_recovery_on = 1
+END;
+`