package sqlserver

import (
	_ "github.com/denisenkom/go-mssqldb" // go-mssqldb initialization
)

// The SQL scripts assemble the correct query based the version of SQL Server
// see https://sqlserverbuilds.blogspot.com/ for all the details about the version number of SQL Server
// Variable @MajorMinorVersion:
//   - 1000 --> SQL Server 2008
//   - 1050 --> SQL Server 2008 R2
//   - 1100 --> SQL Server 2012
//   - 1200 --> SQL Server 2014
//   - 1300 --> SQL Server 2016
//   - 1400 --> SQL Server 2017
//   - 1500 --> SQL Server 2019

// Thanks Bob Ward (http://aka.ms/bobwardms)
// and the folks at Stack Overflow (https://github.com/opserver/Opserver/blob/9c89c7e9936b58ad237b30e6f4cc6cd59c406889/Opserver.Core/Data/SQL/SQLInstance.Memory.cs)
// for putting most of the memory clerk definitions online!
const sqlServerMemoryClerks = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(max) = ''

IF @MajorMinorVersion >= 1100
	SET @Columns += N'mc.[pages_kb]';
ELSE
	SET @Columns += N'mc.[single_pages_kb] + mc.[multi_pages_kb]';

SET @SqlStatement = N'
SELECT
	''sqlserver_memory_clerks'' AS [measurement]
	,REPLACE(@@SERVERNAME, ''\'', '':'') AS [sql_instance]
	,ISNULL(clerk_names.[name],mc.[type]) AS [clerk_type]
	,SUM(' + @Columns + N') AS [size_kb]
FROM sys.[dm_os_memory_clerks] AS mc WITH (NOLOCK)
LEFT OUTER JOIN ( VALUES
	 (''CACHESTORE_BROKERDSH'',''Service Broker Dialog Security Header Cache'')
	,(''CACHESTORE_BROKERKEK'',''Service Broker Key Exchange Key Cache'')
	,(''CACHESTORE_BROKERREADONLY'',''Service Broker (Read-Only)'')
	,(''CACHESTORE_BROKERRSB'',''Service Broker Null Remote Service Binding Cache'')
	,(''CACHESTORE_BROKERTBLACS'',''Broker dormant rowsets'')
	,(''CACHESTORE_BROKERTO'',''Service Broker Transmission Object Cache'')
	,(''CACHESTORE_BROKERUSERCERTLOOKUP'',''Service Broker user certificates lookup result cache'')
	,(''CACHESTORE_CLRPROC'',''CLR Procedure Cache'')
	,(''CACHESTORE_CLRUDTINFO'',''CLR UDT Info'')
	,(''CACHESTORE_COLUMNSTOREOBJECTPOOL'',''Column Store Object Pool'')
	,(''CACHESTORE_CONVPRI'',''Conversation Priority Cache'')
	,(''CACHESTORE_EVENTS'',''Event Notification Cache'')
	,(''CACHESTORE_FULLTEXTSTOPLIST'',''Full Text Stoplist Cache'')
	,(''CACHESTORE_NOTIF'',''Notification Store'')
	,(''CACHESTORE_OBJCP'',''Object Plans'')
	,(''CACHESTORE_PHDR'',''Bound Trees'')
	,(''CACHESTORE_SEARCHPROPERTYLIST'',''Search Property List Cache'')
	,(''CACHESTORE_SEHOBTCOLUMNATTRIBUTE'',''SE Shared Column Metadata Cache'')
	,(''CACHESTORE_SQLCP'',''SQL Plans'')
	,(''CACHESTORE_STACKFRAMES'',''SOS_StackFramesStore'')
	,(''CACHESTORE_SYSTEMROWSET'',''System Rowset Store'')
	,(''CACHESTORE_TEMPTABLES'',''Temporary Tables & Table Variables'')
	,(''CACHESTORE_VIEWDEFINITIONS'',''View Definition Cache'')
	,(''CACHESTORE_XML_SELECTIVE_DG'',''XML DB Cache (Selective)'')
	,(''CACHESTORE_XMLDBATTRIBUTE'',''XML DB Cache (Attribute)'')
	,(''CACHESTORE_XMLDBELEMENT'',''XML DB Cache (Element)'')
	,(''CACHESTORE_XMLDBTYPE'',''XML DB Cache (Type)'')
	,(''CACHESTORE_XPROC'',''Extended Stored Procedures'')
	,(''MEMORYCLERK_FILETABLE'',''Memory Clerk (File Table)'')
	,(''MEMORYCLERK_FSCHUNKER'',''Memory Clerk (FS Chunker)'')
	,(''MEMORYCLERK_FULLTEXT'',''Full Text'')
	,(''MEMORYCLERK_FULLTEXT_SHMEM'',''Full-text IG'')
	,(''MEMORYCLERK_HADR'',''HADR'')
	,(''MEMORYCLERK_HOST'',''Host'')
	,(''MEMORYCLERK_LANGSVC'',''Language Service'')
	,(''MEMORYCLERK_LWC'',''Light Weight Cache'')
	,(''MEMORYCLERK_QSRANGEPREFETCH'',''QS Range Prefetch'')
	,(''MEMORYCLERK_SERIALIZATION'',''Serialization'')
	,(''MEMORYCLERK_SNI'',''SNI'')
	,(''MEMORYCLERK_SOSMEMMANAGER'',''SOS Memory Manager'')
	,(''MEMORYCLERK_SOSNODE'',''SOS Node'')
	,(''MEMORYCLERK_SOSOS'',''SOS Memory Clerk'')
	,(''MEMORYCLERK_SQLBUFFERPOOL'',''Buffer Pool'')
	,(''MEMORYCLERK_SQLCLR'',''CLR'')
	,(''MEMORYCLERK_SQLCLRASSEMBLY'',''CLR Assembly'')
	,(''MEMORYCLERK_SQLCONNECTIONPOOL'',''Connection Pool'')
	,(''MEMORYCLERK_SQLGENERAL'',''General'')
	,(''MEMORYCLERK_SQLHTTP'',''HTTP'')
	,(''MEMORYCLERK_SQLLOGPOOL'',''Log Pool'')
	,(''MEMORYCLERK_SQLOPTIMIZER'',''SQL Optimizer'')
	,(''MEMORYCLERK_SQLQERESERVATIONS'',''SQL Reservations'')
	,(''MEMORYCLERK_SQLQUERYCOMPILE'',''SQL Query Compile'')
	,(''MEMORYCLERK_SQLQUERYEXEC'',''SQL Query Exec'')
	,(''MEMORYCLERK_SQLQUERYPLAN'',''SQL Query Plan'')
	,(''MEMORYCLERK_SQLSERVICEBROKER'',''SQL Service Broker'')
	,(''MEMORYCLERK_SQLSERVICEBROKERTRANSPORT'',''Unified Communication Stack'')
	,(''MEMORYCLERK_SQLSOAP'',''SQL SOAP'')
	,(''MEMORYCLERK_SQLSOAPSESSIONSTORE'',''SQL SOAP (Session Store)'')
	,(''MEMORYCLERK_SQLSTORENG'',''SQL Storage Engine'')
	,(''MEMORYCLERK_SQLUTILITIES'',''SQL Utilities'')
	,(''MEMORYCLERK_SQLXML'',''SQL XML'')
	,(''MEMORYCLERK_SQLXP'',''SQL XP'')
	,(''MEMORYCLERK_TRACE_EVTNOTIF'',''Trace Event Notification'')
	,(''MEMORYCLERK_XE'',''XE Engine'')
	,(''MEMORYCLERK_XE_BUFFER'',''XE Buffer'')
	,(''MEMORYCLERK_XTP'',''In-Memory OLTP'')
	,(''OBJECTSTORE_LBSS'',''Lbss Cache (Object Store)'')
	,(''OBJECTSTORE_LOCK_MANAGER'',''Lock Manager (Object Store)'')
	,(''OBJECTSTORE_SECAUDIT_EVENT_BUFFER'',''Audit Event Buffer (Object Store)'')
	,(''OBJECTSTORE_SERVICE_BROKER'',''Service Broker (Object Store)'')
	,(''OBJECTSTORE_SNI_PACKET'',''SNI Packet (Object Store)'')
	,(''OBJECTSTORE_XACT_CACHE'',''Transactions Cache (Object Store)'')
	,(''USERSTORE_DBMETADATA'',''DB Metadata (User Store)'')
	,(''USERSTORE_OBJPERM'',''Object Permissions (User Store)'')
	,(''USERSTORE_SCHEMAMGR'',''Schema Manager (User Store)'')
	,(''USERSTORE_SXC'',''SXC (User Store)'')
	,(''USERSTORE_TOKENPERM'',''Token Permissions (User Store)'')
	,(''USERSTORE_QDSSTMT'',''QDS Statement Buffer (Pre-persist)'')
	,(''CACHESTORE_QDSRUNTIMESTATS'',''QDS Runtime Stats (Pre-persist)'')
	,(''CACHESTORE_QDSCONTEXTSETTINGS'',''QDS Unique Context Settings'')
	,(''MEMORYCLERK_QUERYDISKSTORE'',''QDS General'')
	,(''MEMORYCLERK_QUERYDISKSTORE_HASHMAP'',''QDS Query/Plan Hash Table'')
) AS clerk_names([system_name],[name])
	ON mc.[type] = clerk_names.[system_name]
GROUP BY
	ISNULL(clerk_names.[name], mc.[type])
HAVING
	SUM(' + @Columns + N') >= 1024
OPTION(RECOMPILE);
'

EXEC(@SqlStatement)
`

const sqlServerDatabaseIO = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int) * 100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(max) = ''
	,@Tables AS nvarchar(max) = ''

IF @MajorMinorVersion >= 1050 BEGIN
	/*in [volume_mount_point] any trailing "\" char will be automatically removed by telegraf */
	SET @Columns += N'
	,[volume_mount_point]'
	SET @Tables += N'
	CROSS APPLY sys.dm_os_volume_stats(vfs.[database_id], vfs.[file_id]) AS vs'
END
IF @MajorMinorVersion > 1100 BEGIN
	SET @Columns += N'
	,vfs.[io_stall_queued_read_ms] AS [rg_read_stall_ms]
	,vfs.[io_stall_queued_write_ms] AS [rg_write_stall_ms]'
END

SET @SqlStatement = N'
SELECT
	''sqlserver_database_io'' AS [measurement]
	,REPLACE(@@SERVERNAME,''\'','':'') AS [sql_instance]
	,DB_NAME(vfs.[database_id]) AS [database_name]
	,COALESCE(mf.[physical_name],''RBPEX'') AS [physical_filename]	--RPBEX = Resilient Buffer Pool Extension
	,COALESCE(mf.[name],''RBPEX'') AS [logical_filename]	--RPBEX = Resilient Buffer Pool Extension	
	,mf.[type_desc] AS [file_type]
	,vfs.[io_stall_read_ms] AS [read_latency_ms]
	,vfs.[num_of_reads] AS [reads]
	,vfs.[num_of_bytes_read] AS [read_bytes]
	,vfs.[io_stall_write_ms] AS [write_latency_ms]
	,vfs.[num_of_writes] AS [writes]
	,vfs.[num_of_bytes_written] AS [write_bytes]'
	+ @Columns + N'
FROM sys.dm_io_virtual_file_stats(NULL, NULL) AS vfs
INNER JOIN sys.master_files AS mf WITH (NOLOCK)
	ON vfs.[database_id] = mf.[database_id] AND vfs.[file_id] = mf.[file_id]'
+ @Tables;

EXEC sp_executesql @SqlStatement
`

const sqlServerProperties = `
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
	 @SqlStatement AS nvarchar(max) = ''
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(MAX) = ''

IF @MajorMinorVersion >= 1050
	SET @Columns = N'
	,CASE [virtual_machine_type_desc]
		WHEN ''NONE'' THEN ''PHYSICAL Machine''
		ELSE [virtual_machine_type_desc]
	END AS [hardware_type]'

SET @SqlStatement = '
SELECT
	 ''sqlserver_server_properties'' AS [measurement]
	,REPLACE(@@SERVERNAME,''\'','':'') AS [sql_instance]
	,si.[cpu_count]
	,(SELECT [total_physical_memory_kb] FROM sys.[dm_os_sys_memory]) AS [server_memory]
	,SERVERPROPERTY(''Edition'') AS [sku]
	,CAST(SERVERPROPERTY(''EngineEdition'') AS int) AS [engine_edition]
	,DATEDIFF(MINUTE,si.[sqlserver_start_time],GETDATE()) AS [uptime]
	,SERVERPROPERTY(''ProductVersion'') AS [sql_version]
	,LEFT(@@VERSION,CHARINDEX('' - '',@@VERSION)) AS [sql_version_desc]
	,dbs.[db_online]
	,dbs.[db_restoring]
	,dbs.[db_recovering]
	,dbs.[db_recoveryPending]
	,dbs.[db_suspect]
	,dbs.[db_offline]'
	+ @Columns + N'
	FROM sys.[dm_os_sys_info] AS si
	CROSS APPLY (
		SELECT
			 SUM(CASE WHEN state = 0 THEN 1 ELSE 0 END) AS [db_online]
			,SUM(CASE WHEN state = 1 THEN 1 ELSE 0 END) AS [db_restoring]
			,SUM(CASE WHEN state = 2 THEN 1 ELSE 0 END) AS [db_recovering]
			,SUM(CASE WHEN state = 3 THEN 1 ELSE 0 END) AS [db_recoveryPending]
			,SUM(CASE WHEN state = 4 THEN 1 ELSE 0 END) AS [db_suspect]
			,SUM(CASE WHEN state IN(6, 10) THEN 1 ELSE 0 END) AS [db_offline]
		FROM sys.databases
	) AS dbs
'

EXEC sp_executesql @SqlStatement
`

const sqlServerSchedulers string = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(MAX) = ''

IF @MajorMinorVersion >= 1300 BEGIN
	SET @Columns += N'
	,s.[total_cpu_usage_ms]
	,s.[total_scheduler_delay_ms]'
END

SET @SqlStatement = N'
SELECT
	 ''sqlserver_schedulers'' AS [measurement]
	,REPLACE(@@SERVERNAME, ''\'', '':'') AS [sql_instance]
	,CAST(s.[scheduler_id] AS VARCHAR(4)) AS [scheduler_id]
	,CAST(s.[cpu_id] AS VARCHAR(4)) AS [cpu_id]
	,s.[is_online]
	,s.[is_idle]
	,s.[preemptive_switches_count]
	,s.[context_switches_count]
	,s.[current_tasks_count]
	,s.[runnable_tasks_count]
	,s.[current_workers_count]
	,s.[active_workers_count]
	,s.[work_queue_count]
	,s.[pending_disk_io_count]
	,s.[load_factor]
	,s.[yield_count]'
	+ @Columns + N'
FROM sys.dm_os_schedulers AS s'

EXEC sp_executesql @SqlStatement
`

/*
This string defines a SQL statements to retrieve Performance Counters as documented here -
	SQL Server Performance Objects - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/use-sql-server-objects?view=sql-server-ver15#SQLServerPOs
Some of the specific objects used are -
	MSSQL$*:Access Methods - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-access-methods-object?view=sql-server-ver15
	MSSQL$*:Buffer Manager - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-buffer-manager-object?view=sql-server-ver15
	MSSQL$*:Databases - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-databases-object?view=sql-server-ver15
	MSSQL$*:General Statistics - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-general-statistics-object?view=sql-server-ver15
	MSSQL$*:Exec Statistics - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-execstatistics-object?view=sql-server-ver15
	SQLServer:Query Store - https://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/sql-server-query-store-object?view=sql-server-ver15
*/
const sqlServerPerformanceCounters 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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)

DECLARE @PCounters TABLE
(
	 [object_name] nvarchar(128)
	,[counter_name] nvarchar(128)
	,[instance_name] nvarchar(128)
	,[cntr_value] bigint
	,[cntr_type] int
	PRIMARY KEY([object_name], [counter_name], [instance_name])
);

WITH PerfCounters AS (
SELECT DISTINCT
	 RTRIM(spi.[object_name]) [object_name]
	,RTRIM(spi.[counter_name]) [counter_name]
	,RTRIM(spi.[instance_name]) AS [instance_name]
	,CAST(spi.[cntr_value] AS bigint) AS [cntr_value]
	,spi.[cntr_type]
	FROM sys.dm_os_performance_counters AS spi
	WHERE
		counter_name IN (
			 'SQL Compilations/sec'
			,'SQL Re-Compilations/sec'
			,'User Connections'
			,'Batch Requests/sec'
			,'Logouts/sec'
			,'Logins/sec'
			,'Processes blocked'
			,'Latch Waits/sec'
			,'Full Scans/sec'
			,'Index Searches/sec'
			,'Page Splits/sec'
			,'Page lookups/sec'
			,'Page reads/sec'
			,'Page writes/sec'
			,'Readahead pages/sec'
			,'Lazy writes/sec'
			,'Checkpoint pages/sec'
			,'Table Lock Escalations/sec'
			,'Page life expectancy'
			,'Log File(s) Size (KB)'
			,'Log File(s) Used Size (KB)'
			,'Data File(s) Size (KB)'
			,'Transactions/sec'
			,'Write Transactions/sec'
			,'Active Transactions'
			,'Log Growths'
			,'Active Temp Tables'
			,'Logical Connections'
			,'Temp Tables Creation Rate'
			,'Temp Tables For Destruction'
			,'Free Space in tempdb (KB)'
			,'Version Store Size (KB)'
			,'Memory Grants Pending'
			,'Memory Grants Outstanding'
			,'Free list stalls/sec'
			,'Buffer cache hit ratio'
			,'Buffer cache hit ratio base'
			,'Backup/Restore Throughput/sec'
			,'Total Server Memory (KB)'
			,'Target Server Memory (KB)'
			,'Log Flushes/sec'
			,'Log Flush Wait Time'
			,'Memory broker clerk size'
			,'Log Bytes Flushed/sec'
			,'Bytes Sent to Replica/sec'
			,'Log Send Queue'
			,'Bytes Sent to Transport/sec'
			,'Sends to Replica/sec'
			,'Bytes Sent to Transport/sec'
			,'Sends to Transport/sec'
			,'Bytes Received from Replica/sec'
			,'Receives from Replica/sec'
			,'Flow Control Time (ms/sec)'
			,'Flow Control/sec'
			,'Resent Messages/sec'
			,'Redone Bytes/sec'
			,'XTP Memory Used (KB)'
			,'Transaction Delay'
			,'Log Bytes Received/sec'
			,'Log Apply Pending Queue'
			,'Redone Bytes/sec'
			,'Recovery Queue'
			,'Log Apply Ready Queue'
			,'CPU usage %'
			,'CPU usage % base'
			,'Queued requests'
			,'Requests completed/sec'
			,'Blocked tasks'
			,'Active memory grant amount (KB)'
			,'Disk Read Bytes/sec'
			,'Disk Read IO Throttled/sec'
			,'Disk Read IO/sec'
			,'Disk Write Bytes/sec'
			,'Disk Write IO Throttled/sec'
			,'Disk Write IO/sec'
			,'Used memory (KB)'
			,'Forwarded Records/sec'
			,'Background Writer pages/sec'
			,'Percent Log Used'
			,'Log Send Queue KB'
			,'Redo Queue KB'
			,'Mirrored Write Transactions/sec'
			,'Group Commit Time'
			,'Group Commits/Sec'
			,'Workfiles Created/sec'
			,'Worktables Created/sec'
			,'Distributed Query'
			,'DTC calls'
			,'Query Store CPU usage'
		) OR (
			spi.[object_name] LIKE '%User Settable%'
			OR spi.[object_name] LIKE '%SQL Errors%'
			OR spi.[object_name] LIKE '%Batch Resp Statistics%'
		) OR (
			spi.[instance_name] IN ('_Total')
			AND spi.[counter_name] IN (
				 'Lock Timeouts/sec'
				,'Lock Timeouts (timeout > 0)/sec'
				,'Number of Deadlocks/sec'
				,'Lock Waits/sec'
				,'Latch Waits/sec'
			)
		)
)

INSERT INTO @PCounters SELECT * FROM PerfCounters;

SELECT
	 'sqlserver_performance' AS [measurement]
	,REPLACE(@@SERVERNAME,'\',':') AS [sql_instance]
	,pc.[object_name] AS [object]
	,pc.[counter_name] AS [counter]
	,CASE pc.[instance_name] WHEN '_Total' THEN 'Total' ELSE ISNULL(pc.[instance_name],'') END AS [instance]
	,CAST(CASE WHEN pc.[cntr_type] = 537003264 AND pc1.[cntr_value] > 0 THEN (pc.[cntr_value] * 1.0) / (pc1.[cntr_value] * 1.0) * 100 ELSE pc.[cntr_value] END AS float(10)) AS [value]
	,CAST(pc.[cntr_type] AS varchar(25)) AS [counter_type]
FROM @PCounters AS pc
LEFT OUTER JOIN @PCounters AS pc1
	ON (
		pc.[counter_name] = REPLACE(pc1.[counter_name],' base','')
		OR pc.[counter_name] = REPLACE(pc1.[counter_name],' base',' (ms)')
	)
	AND pc.[object_name] = pc1.[object_name]
	AND pc.[instance_name] = pc1.[instance_name]
	AND pc1.[counter_name] LIKE '%base'
WHERE
	pc.[counter_name] NOT LIKE '% base'
OPTION(RECOMPILE)
`

const sqlServerWaitStatsCategorized string = `
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

SELECT
	 'sqlserver_waitstats' AS [measurement]
	,REPLACE(@@SERVERNAME,'\',':') AS [sql_instance]
	,ws.[wait_type]
	,ws.[wait_time_ms]
	,ws.[wait_time_ms] - ws.[signal_wait_time_ms] AS [resource_wait_ms]
	,ws.[signal_wait_time_ms]
	,ws.[max_wait_time_ms]
	,ws.[waiting_tasks_count]
	,ISNULL(wc.[wait_category],'OTHER') AS [wait_category]
FROM sys.dm_os_wait_stats AS ws WITH (NOLOCK)
LEFT OUTER JOIN ( VALUES
	('ASYNC_IO_COMPLETION','Other Disk IO'),
	('ASYNC_NETWORK_IO','Network IO'),
	('BACKUPIO','Other Disk IO'),
	('BROKER_CONNECTION_RECEIVE_TASK','Service Broker'),
	('BROKER_DISPATCHER','Service Broker'),
	('BROKER_ENDPOINT_STATE_MUTEX','Service Broker'),
	('BROKER_EVENTHANDLER','Service Broker'),
	('BROKER_FORWARDER','Service Broker'),
	('BROKER_INIT','Service Broker'),
	('BROKER_MASTERSTART','Service Broker'),
	('BROKER_RECEIVE_WAITFOR','User Wait'),
	('BROKER_REGISTERALLENDPOINTS','Service Broker'),
	('BROKER_SERVICE','Service Broker'),
	('BROKER_SHUTDOWN','Service Broker'),
	('BROKER_START','Service Broker'),
	('BROKER_TASK_SHUTDOWN','Service Broker'),
	('BROKER_TASK_STOP','Service Broker'),
	('BROKER_TASK_SUBMIT','Service Broker'),
	('BROKER_TO_FLUSH','Service Broker'),
	('BROKER_TRANSMISSION_OBJECT','Service Broker'),
	('BROKER_TRANSMISSION_TABLE','Service Broker'),
	('BROKER_TRANSMISSION_WORK','Service Broker'),
	('BROKER_TRANSMITTER','Service Broker'),
	('CHECKPOINT_QUEUE','Idle'),
	('CHKPT','Tran Log IO'),
	('CLR_AUTO_EVENT','SQL CLR'),
	('CLR_CRST','SQL CLR'),
	('CLR_JOIN','SQL CLR'),
	('CLR_MANUAL_EVENT','SQL CLR'),
	('CLR_MEMORY_SPY','SQL CLR'),
	('CLR_MONITOR','SQL CLR'),
	('CLR_RWLOCK_READER','SQL CLR'),
	('CLR_RWLOCK_WRITER','SQL CLR'),
	('CLR_SEMAPHORE','SQL CLR'),
	('CLR_TASK_START','SQL CLR'),
	('CLRHOST_STATE_ACCESS','SQL CLR'),
	('CMEMPARTITIONED','Memory'),
	('CMEMTHREAD','Memory'),
	('CXPACKET','Parallelism'),
	('CXCONSUMER','Parallelism'),
	('DBMIRROR_DBM_EVENT','Mirroring'),
	('DBMIRROR_DBM_MUTEX','Mirroring'),
	('DBMIRROR_EVENTS_QUEUE','Mirroring'),
	('DBMIRROR_SEND','Mirroring'),
	('DBMIRROR_WORKER_QUEUE','Mirroring'),
	('DBMIRRORING_CMD','Mirroring'),
	('DTC','Transaction'),
	('DTC_ABORT_REQUEST','Transaction'),
	('DTC_RESOLVE','Transaction'),
	('DTC_STATE','Transaction'),
	('DTC_TMDOWN_REQUEST','Transaction'),
	('DTC_WAITFOR_OUTCOME','Transaction'),
	('DTCNEW_ENLIST','Transaction'),
	('DTCNEW_PREPARE','Transaction'),
	('DTCNEW_RECOVERY','Transaction'),
	('DTCNEW_TM','Transaction'),
	('DTCNEW_TRANSACTION_ENLISTMENT','Transaction'),
	('DTCPNTSYNC','Transaction'),
	('EE_PMOLOCK','Memory'),
	('EXCHANGE','Parallelism'),
	('EXTERNAL_SCRIPT_NETWORK_IOF','Network IO'),
	('FCB_REPLICA_READ','Replication'),
	('FCB_REPLICA_WRITE','Replication'),
	('FT_COMPROWSET_RWLOCK','Full Text Search'),
	('FT_IFTS_RWLOCK','Full Text Search'),
	('FT_IFTS_SCHEDULER_IDLE_WAIT','Idle'),
	('FT_IFTSHC_MUTEX','Full Text Search'),
	('FT_IFTSISM_MUTEX','Full Text Search'),
	('FT_MASTER_MERGE','Full Text Search'),
	('FT_MASTER_MERGE_COORDINATOR','Full Text Search'),
	('FT_METADATA_MUTEX','Full Text Search'),
	('FT_PROPERTYLIST_CACHE','Full Text Search'),
	('FT_RESTART_CRAWL','Full Text Search'),
	('FULLTEXT GATHERER','Full Text Search'),
	('HADR_AG_MUTEX','Replication'),
	('HADR_AR_CRITICAL_SECTION_ENTRY','Replication'),
	('HADR_AR_MANAGER_MUTEX','Replication'),
	('HADR_AR_UNLOAD_COMPLETED','Replication'),
	('HADR_ARCONTROLLER_NOTIFICATIONS_SUBSCRIBER_LIST','Replication'),
	('HADR_BACKUP_BULK_LOCK','Replication'),
	('HADR_BACKUP_QUEUE','Replication'),
	('HADR_CLUSAPI_CALL','Replication'),
	('HADR_COMPRESSED_CACHE_SYNC','Replication'),
	('HADR_CONNECTIVITY_INFO','Replication'),
	('HADR_DATABASE_FLOW_CONTROL','Replication'),
	('HADR_DATABASE_VERSIONING_STATE','Replication'),
	('HADR_DATABASE_WAIT_FOR_RECOVERY','Replication'),
	('HADR_DATABASE_WAIT_FOR_RESTART','Replication'),
	('HADR_DATABASE_WAIT_FOR_TRANSITION_TO_VERSIONING','Replication'),
	('HADR_DB_COMMAND','Replication'),
	('HADR_DB_OP_COMPLETION_SYNC','Replication'),
	('HADR_DB_OP_START_SYNC','Replication'),
	('HADR_DBR_SUBSCRIBER','Replication'),
	('HADR_DBR_SUBSCRIBER_FILTER_LIST','Replication'),
	('HADR_DBSEEDING','Replication'),
	('HADR_DBSEEDING_LIST','Replication'),
	('HADR_DBSTATECHANGE_SYNC','Replication'),
	('HADR_FABRIC_CALLBACK','Replication'),
	('HADR_FILESTREAM_BLOCK_FLUSH','Replication'),
	('HADR_FILESTREAM_FILE_CLOSE','Replication'),
	('HADR_FILESTREAM_FILE_REQUEST','Replication'),
	('HADR_FILESTREAM_IOMGR','Replication'),
	('HADR_FILESTREAM_IOMGR_IOCOMPLETION','Replication'),
	('HADR_FILESTREAM_MANAGER','Replication'),
	('HADR_FILESTREAM_PREPROC','Replication'),
	('HADR_GROUP_COMMIT','Replication'),
	('HADR_LOGCAPTURE_SYNC','Replication'),
	('HADR_LOGCAPTURE_WAIT','Replication'),
	('HADR_LOGPROGRESS_SYNC','Replication'),
	('HADR_NOTIFICATION_DEQUEUE','Replication'),
	('HADR_NOTIFICATION_WORKER_EXCLUSIVE_ACCESS','Replication'),
	('HADR_NOTIFICATION_WORKER_STARTUP_SYNC','Replication'),
	('HADR_NOTIFICATION_WORKER_TERMINATION_SYNC','Replication'),
	('HADR_PARTNER_SYNC','Replication'),
	('HADR_READ_ALL_NETWORKS','Replication'),
	('HADR_RECOVERY_WAIT_FOR_CONNECTION','Replication'),
	('HADR_RECOVERY_WAIT_FOR_UNDO','Replication'),
	('HADR_REPLICAINFO_SYNC','Replication'),
	('HADR_SEEDING_CANCELLATION','Replication'),
	('HADR_SEEDING_FILE_LIST','Replication'),
	('HADR_SEEDING_LIMIT_BACKUPS','Replication'),
	('HADR_SEEDING_SYNC_COMPLETION','Replication'),
	('HADR_SEEDING_TIMEOUT_TASK','Replication'),
	('HADR_SEEDING_WAIT_FOR_COMPLETION','Replication'),
	('HADR_SYNC_COMMIT','Replication'),
	('HADR_SYNCHRONIZING_THROTTLE','Replication'),
	('HADR_TDS_LISTENER_SYNC','Replication'),
	('HADR_TDS_LISTENER_SYNC_PROCESSING','Replication'),
	('HADR_THROTTLE_LOG_RATE_GOVERNOR','Log Rate Governor'),
	('HADR_TIMER_TASK','Replication'),
	('HADR_TRANSPORT_DBRLIST','Replication'),
	('HADR_TRANSPORT_FLOW_CONTROL','Replication'),
	('HADR_TRANSPORT_SESSION','Replication'),
	('HADR_WORK_POOL','Replication'),
	('HADR_WORK_QUEUE','Replication'),
	('HADR_XRF_STACK_ACCESS','Replication'),
	('INSTANCE_LOG_RATE_GOVERNOR','Log Rate Governor'),
	('IO_COMPLETION','Other Disk IO'),
	('IO_QUEUE_LIMIT','Other Disk IO'),
	('IO_RETRY','Other Disk IO'),
	('LATCH_DT','Latch'),
	('LATCH_EX','Latch'),
	('LATCH_KP','Latch'),
	('LATCH_NL','Latch'),
	('LATCH_SH','Latch'),
	('LATCH_UP','Latch'),
	('LAZYWRITER_SLEEP','Idle'),
	('LCK_M_BU','Lock'),
	('LCK_M_BU_ABORT_BLOCKERS','Lock'),
	('LCK_M_BU_LOW_PRIORITY','Lock'),
	('LCK_M_IS','Lock'),
	('LCK_M_IS_ABORT_BLOCKERS','Lock'),
	('LCK_M_IS_LOW_PRIORITY','Lock'),
	('LCK_M_IU','Lock'),
	('LCK_M_IU_ABORT_BLOCKERS','Lock'),
	('LCK_M_IU_LOW_PRIORITY','Lock'),
	('LCK_M_IX','Lock'),
	('LCK_M_IX_ABORT_BLOCKERS','Lock'),
	('LCK_M_IX_LOW_PRIORITY','Lock'),
	('LCK_M_RIn_NL','Lock'),
	('LCK_M_RIn_NL_ABORT_BLOCKERS','Lock'),
	('LCK_M_RIn_NL_LOW_PRIORITY','Lock'),
	('LCK_M_RIn_S','Lock'),
	('LCK_M_RIn_S_ABORT_BLOCKERS','Lock'),
	('LCK_M_RIn_S_LOW_PRIORITY','Lock'),
	('LCK_M_RIn_U','Lock'),
	('LCK_M_RIn_U_ABORT_BLOCKERS','Lock'),
	('LCK_M_RIn_U_LOW_PRIORITY','Lock'),
	('LCK_M_RIn_X','Lock'),
	('LCK_M_RIn_X_ABORT_BLOCKERS','Lock'),
	('LCK_M_RIn_X_LOW_PRIORITY','Lock'),
	('LCK_M_RS_S','Lock'),
	('LCK_M_RS_S_ABORT_BLOCKERS','Lock'),
	('LCK_M_RS_S_LOW_PRIORITY','Lock'),
	('LCK_M_RS_U','Lock'),
	('LCK_M_RS_U_ABORT_BLOCKERS','Lock'),
	('LCK_M_RS_U_LOW_PRIORITY','Lock'),
	('LCK_M_RX_S','Lock'),
	('LCK_M_RX_S_ABORT_BLOCKERS','Lock'),
	('LCK_M_RX_S_LOW_PRIORITY','Lock'),
	('LCK_M_RX_U','Lock'),
	('LCK_M_RX_U_ABORT_BLOCKERS','Lock'),
	('LCK_M_RX_U_LOW_PRIORITY','Lock'),
	('LCK_M_RX_X','Lock'),
	('LCK_M_RX_X_ABORT_BLOCKERS','Lock'),
	('LCK_M_RX_X_LOW_PRIORITY','Lock'),
	('LCK_M_S','Lock'),
	('LCK_M_S_ABORT_BLOCKERS','Lock'),
	('LCK_M_S_LOW_PRIORITY','Lock'),
	('LCK_M_SCH_M','Lock'),
	('LCK_M_SCH_M_ABORT_BLOCKERS','Lock'),
	('LCK_M_SCH_M_LOW_PRIORITY','Lock'),
	('LCK_M_SCH_S','Lock'),
	('LCK_M_SCH_S_ABORT_BLOCKERS','Lock'),
	('LCK_M_SCH_S_LOW_PRIORITY','Lock'),
	('LCK_M_SIU','Lock'),
	('LCK_M_SIU_ABORT_BLOCKERS','Lock'),
	('LCK_M_SIU_LOW_PRIORITY','Lock'),
	('LCK_M_SIX','Lock'),
	('LCK_M_SIX_ABORT_BLOCKERS','Lock'),
	('LCK_M_SIX_LOW_PRIORITY','Lock'),
	('LCK_M_U','Lock'),
	('LCK_M_U_ABORT_BLOCKERS','Lock'),
	('LCK_M_U_LOW_PRIORITY','Lock'),
	('LCK_M_UIX','Lock'),
	('LCK_M_UIX_ABORT_BLOCKERS','Lock'),
	('LCK_M_UIX_LOW_PRIORITY','Lock'),
	('LCK_M_X','Lock'),
	('LCK_M_X_ABORT_BLOCKERS','Lock'),
	('LCK_M_X_LOW_PRIORITY','Lock'),
	('LOGBUFFER','Tran Log IO'),
	('LOGMGR','Tran Log IO'),
	('LOGMGR_FLUSH','Tran Log IO'),
	('LOGMGR_PMM_LOG','Tran Log IO'),
	('LOGMGR_QUEUE','Idle'),
	('LOGMGR_RESERVE_APPEND','Tran Log IO'),
	('MEMORY_ALLOCATION_EXT','Memory'),
	('MEMORY_GRANT_UPDATE','Memory'),
	('MSQL_XACT_MGR_MUTEX','Transaction'),
	('MSQL_XACT_MUTEX','Transaction'),
	('MSSEARCH','Full Text Search'),
	('NET_WAITFOR_PACKET','Network IO'),
	('ONDEMAND_TASK_QUEUE','Idle'),
	('PAGEIOLATCH_DT','Buffer IO'),
	('PAGEIOLATCH_EX','Buffer IO'),
	('PAGEIOLATCH_KP','Buffer IO'),
	('PAGEIOLATCH_NL','Buffer IO'),
	('PAGEIOLATCH_SH','Buffer IO'),
	('PAGEIOLATCH_UP','Buffer IO'),
	('PAGELATCH_DT','Buffer Latch'),
	('PAGELATCH_EX','Buffer Latch'),
	('PAGELATCH_KP','Buffer Latch'),
	('PAGELATCH_NL','Buffer Latch'),
	('PAGELATCH_SH','Buffer Latch'),
	('PAGELATCH_UP','Buffer Latch'),
	('POOL_LOG_RATE_GOVERNOR','Log Rate Governor'),
	('PREEMPTIVE_ABR','Preemptive'),
	('PREEMPTIVE_CLOSEBACKUPMEDIA','Preemptive'),
	('PREEMPTIVE_CLOSEBACKUPTAPE','Preemptive'),
	('PREEMPTIVE_CLOSEBACKUPVDIDEVICE','Preemptive'),
	('PREEMPTIVE_CLUSAPI_CLUSTERRESOURCECONTROL','Preemptive'),
	('PREEMPTIVE_COM_COCREATEINSTANCE','Preemptive'),
	('PREEMPTIVE_COM_COGETCLASSOBJECT','Preemptive'),
	('PREEMPTIVE_COM_CREATEACCESSOR','Preemptive'),
	('PREEMPTIVE_COM_DELETEROWS','Preemptive'),
	('PREEMPTIVE_COM_GETCOMMANDTEXT','Preemptive'),
	('PREEMPTIVE_COM_GETDATA','Preemptive'),
	('PREEMPTIVE_COM_GETNEXTROWS','Preemptive'),
	('PREEMPTIVE_COM_GETRESULT','Preemptive'),
	('PREEMPTIVE_COM_GETROWSBYBOOKMARK','Preemptive'),
	('PREEMPTIVE_COM_LBFLUSH','Preemptive'),
	('PREEMPTIVE_COM_LBLOCKREGION','Preemptive'),
	('PREEMPTIVE_COM_LBREADAT','Preemptive'),
	('PREEMPTIVE_COM_LBSETSIZE','Preemptive'),
	('PREEMPTIVE_COM_LBSTAT','Preemptive'),
	('PREEMPTIVE_COM_LBUNLOCKREGION','Preemptive'),
	('PREEMPTIVE_COM_LBWRITEAT','Preemptive'),
	('PREEMPTIVE_COM_QUERYINTERFACE','Preemptive'),
	('PREEMPTIVE_COM_RELEASE','Preemptive'),
	('PREEMPTIVE_COM_RELEASEACCESSOR','Preemptive'),
	('PREEMPTIVE_COM_RELEASEROWS','Preemptive'),
	('PREEMPTIVE_COM_RELEASESESSION','Preemptive'),
	('PREEMPTIVE_COM_RESTARTPOSITION','Preemptive'),
	('PREEMPTIVE_COM_SEQSTRMREAD','Preemptive'),
	('PREEMPTIVE_COM_SEQSTRMREADANDWRITE','Preemptive'),
	('PREEMPTIVE_COM_SETDATAFAILURE','Preemptive'),
	('PREEMPTIVE_COM_SETPARAMETERINFO','Preemptive'),
	('PREEMPTIVE_COM_SETPARAMETERPROPERTIES','Preemptive'),
	('PREEMPTIVE_COM_STRMLOCKREGION','Preemptive'),
	('PREEMPTIVE_COM_STRMSEEKANDREAD','Preemptive'),
	('PREEMPTIVE_COM_STRMSEEKANDWRITE','Preemptive'),
	('PREEMPTIVE_COM_STRMSETSIZE','Preemptive'),
	('PREEMPTIVE_COM_STRMSTAT','Preemptive'),
	('PREEMPTIVE_COM_STRMUNLOCKREGION','Preemptive'),
	('PREEMPTIVE_CONSOLEWRITE','Preemptive'),
	('PREEMPTIVE_CREATEPARAM','Preemptive'),
	('PREEMPTIVE_DEBUG','Preemptive'),
	('PREEMPTIVE_DFSADDLINK','Preemptive'),
	('PREEMPTIVE_DFSLINKEXISTCHECK','Preemptive'),
	('PREEMPTIVE_DFSLINKHEALTHCHECK','Preemptive'),
	('PREEMPTIVE_DFSREMOVELINK','Preemptive'),
	('PREEMPTIVE_DFSREMOVEROOT','Preemptive'),
	('PREEMPTIVE_DFSROOTFOLDERCHECK','Preemptive'),
	('PREEMPTIVE_DFSROOTINIT','Preemptive'),
	('PREEMPTIVE_DFSROOTSHARECHECK','Preemptive'),
	('PREEMPTIVE_DTC_ABORT','Preemptive'),
	('PREEMPTIVE_DTC_ABORTREQUESTDONE','Preemptive'),
	('PREEMPTIVE_DTC_BEGINTRANSACTION','Preemptive'),
	('PREEMPTIVE_DTC_COMMITREQUESTDONE','Preemptive'),
	('PREEMPTIVE_DTC_ENLIST','Preemptive'),
	('PREEMPTIVE_DTC_PREPAREREQUESTDONE','Preemptive'),
	('PREEMPTIVE_FILESIZEGET','Preemptive'),
	('PREEMPTIVE_FSAOLEDB_ABORTTRANSACTION','Preemptive'),
	('PREEMPTIVE_FSAOLEDB_COMMITTRANSACTION','Preemptive'),
	('PREEMPTIVE_FSAOLEDB_STARTTRANSACTION','Preemptive'),
	('PREEMPTIVE_FSRECOVER_UNCONDITIONALUNDO','Preemptive'),
	('PREEMPTIVE_GETRMINFO','Preemptive'),
	('PREEMPTIVE_HADR_LEASE_MECHANISM','Preemptive'),
	('PREEMPTIVE_HTTP_EVENT_WAIT','Preemptive'),
	('PREEMPTIVE_HTTP_REQUEST','Preemptive'),
	('PREEMPTIVE_LOCKMONITOR','Preemptive'),
	('PREEMPTIVE_MSS_RELEASE','Preemptive'),
	('PREEMPTIVE_ODBCOPS','Preemptive'),
	('PREEMPTIVE_OLE_UNINIT','Preemptive'),
	('PREEMPTIVE_OLEDB_ABORTORCOMMITTRAN','Preemptive'),
	('PREEMPTIVE_OLEDB_ABORTTRAN','Preemptive'),
	('PREEMPTIVE_OLEDB_GETDATASOURCE','Preemptive'),
	('PREEMPTIVE_OLEDB_GETLITERALINFO','Preemptive'),
	('PREEMPTIVE_OLEDB_GETPROPERTIES','Preemptive'),
	('PREEMPTIVE_OLEDB_GETPROPERTYINFO','Preemptive'),
	('PREEMPTIVE_OLEDB_GETSCHEMALOCK','Preemptive'),
	('PREEMPTIVE_OLEDB_JOINTRANSACTION','Preemptive'),
	('PREEMPTIVE_OLEDB_RELEASE','Preemptive'),
	('PREEMPTIVE_OLEDB_SETPROPERTIES','Preemptive'),
	('PREEMPTIVE_OLEDBOPS','Preemptive'),
	('PREEMPTIVE_OS_ACCEPTSECURITYCONTEXT','Preemptive'),
	('PREEMPTIVE_OS_ACQUIRECREDENTIALSHANDLE','Preemptive'),
	('PREEMPTIVE_OS_AUTHENTICATIONOPS','Preemptive'),
	('PREEMPTIVE_OS_AUTHORIZATIONOPS','Preemptive'),
	('PREEMPTIVE_OS_AUTHZGETINFORMATIONFROMCONTEXT','Preemptive'),
	('PREEMPTIVE_OS_AUTHZINITIALIZECONTEXTFROMSID','Preemptive'),
	('PREEMPTIVE_OS_AUTHZINITIALIZERESOURCEMANAGER','Preemptive'),
	('PREEMPTIVE_OS_BACKUPREAD','Preemptive'),
	('PREEMPTIVE_OS_CLOSEHANDLE','Preemptive'),
	('PREEMPTIVE_OS_CLUSTEROPS','Preemptive'),
	('PREEMPTIVE_OS_COMOPS','Preemptive'),
	('PREEMPTIVE_OS_COMPLETEAUTHTOKEN','Preemptive'),
	('PREEMPTIVE_OS_COPYFILE','Preemptive'),
	('PREEMPTIVE_OS_CREATEDIRECTORY','Preemptive'),
	('PREEMPTIVE_OS_CREATEFILE','Preemptive'),
	('PREEMPTIVE_OS_CRYPTACQUIRECONTEXT','Preemptive'),
	('PREEMPTIVE_OS_CRYPTIMPORTKEY','Preemptive'),
	('PREEMPTIVE_OS_CRYPTOPS','Preemptive'),
	('PREEMPTIVE_OS_DECRYPTMESSAGE','Preemptive'),
	('PREEMPTIVE_OS_DELETEFILE','Preemptive'),
	('PREEMPTIVE_OS_DELETESECURITYCONTEXT','Preemptive'),
	('PREEMPTIVE_OS_DEVICEIOCONTROL','Preemptive'),
	('PREEMPTIVE_OS_DEVICEOPS','Preemptive'),
	('PREEMPTIVE_OS_DIRSVC_NETWORKOPS','Preemptive'),
	('PREEMPTIVE_OS_DISCONNECTNAMEDPIPE','Preemptive'),
	('PREEMPTIVE_OS_DOMAINSERVICESOPS','Preemptive'),
	('PREEMPTIVE_OS_DSGETDCNAME','Preemptive'),
	('PREEMPTIVE_OS_DTCOPS','Preemptive'),
	('PREEMPTIVE_OS_ENCRYPTMESSAGE','Preemptive'),
	('PREEMPTIVE_OS_FILEOPS','Preemptive'),
	('PREEMPTIVE_OS_FINDFILE','Preemptive'),
	('PREEMPTIVE_OS_FLUSHFILEBUFFERS','Preemptive'),
	('PREEMPTIVE_OS_FORMATMESSAGE','Preemptive'),
	('PREEMPTIVE_OS_FREECREDENTIALSHANDLE','Preemptive'),
	('PREEMPTIVE_OS_FREELIBRARY','Preemptive'),
	('PREEMPTIVE_OS_GENERICOPS','Preemptive'),
	('PREEMPTIVE_OS_GETADDRINFO','Preemptive'),
	('PREEMPTIVE_OS_GETCOMPRESSEDFILESIZE','Preemptive'),
	('PREEMPTIVE_OS_GETDISKFREESPACE','Preemptive'),
	('PREEMPTIVE_OS_GETFILEATTRIBUTES','Preemptive'),
	('PREEMPTIVE_OS_GETFILESIZE','Preemptive'),
	('PREEMPTIVE_OS_GETFINALFILEPATHBYHANDLE','Preemptive'),
	('PREEMPTIVE_OS_GETLONGPATHNAME','Preemptive'),
	('PREEMPTIVE_OS_GETPROCADDRESS','Preemptive'),
	('PREEMPTIVE_OS_GETVOLUMENAMEFORVOLUMEMOUNTPOINT','Preemptive'),
	('PREEMPTIVE_OS_GETVOLUMEPATHNAME','Preemptive'),
	('PREEMPTIVE_OS_INITIALIZESECURITYCONTEXT','Preemptive'),
	('PREEMPTIVE_OS_LIBRARYOPS','Preemptive'),
	('PREEMPTIVE_OS_LOADLIBRARY','Preemptive'),
	('PREEMPTIVE_OS_LOGONUSER','Preemptive'),
	('PREEMPTIVE_OS_LOOKUPACCOUNTSID','Preemptive'),
	('PREEMPTIVE_OS_MESSAGEQUEUEOPS','Preemptive'),
	('PREEMPTIVE_OS_MOVEFILE','Preemptive'),
	('PREEMPTIVE_OS_NETGROUPGETUSERS','Preemptive'),
	('PREEMPTIVE_OS_NETLOCALGROUPGETMEMBERS','Preemptive'),
	('PREEMPTIVE_OS_NETUSERGETGROUPS','Preemptive'),
	('PREEMPTIVE_OS_NETUSERGETLOCALGROUPS','Preemptive'),
	('PREEMPTIVE_OS_NETUSERMODALSGET','Preemptive'),
	('PREEMPTIVE_OS_NETVALIDATEPASSWORDPOLICY','Preemptive'),
	('PREEMPTIVE_OS_NETVALIDATEPASSWORDPOLICYFREE','Preemptive'),
	('PREEMPTIVE_OS_OPENDIRECTORY','Preemptive'),
	('PREEMPTIVE_OS_PDH_WMI_INIT','Preemptive'),
	('PREEMPTIVE_OS_PIPEOPS','Preemptive'),
	('PREEMPTIVE_OS_PROCESSOPS','Preemptive'),
	('PREEMPTIVE_OS_QUERYCONTEXTATTRIBUTES','Preemptive'),
	('PREEMPTIVE_OS_QUERYREGISTRY','Preemptive'),
	('PREEMPTIVE_OS_QUERYSECURITYCONTEXTTOKEN','Preemptive'),
	('PREEMPTIVE_OS_REMOVEDIRECTORY','Preemptive'),
	('PREEMPTIVE_OS_REPORTEVENT','Preemptive'),
	('PREEMPTIVE_OS_REVERTTOSELF','Preemptive'),
	('PREEMPTIVE_OS_RSFXDEVICEOPS','Preemptive'),
	('PREEMPTIVE_OS_SECURITYOPS','Preemptive'),
	('PREEMPTIVE_OS_SERVICEOPS','Preemptive'),
	('PREEMPTIVE_OS_SETENDOFFILE','Preemptive'),
	('PREEMPTIVE_OS_SETFILEPOINTER','Preemptive'),
	('PREEMPTIVE_OS_SETFILEVALIDDATA','Preemptive'),
	('PREEMPTIVE_OS_SETNAMEDSECURITYINFO','Preemptive'),
	('PREEMPTIVE_OS_SQLCLROPS','Preemptive'),
	('PREEMPTIVE_OS_SQMLAUNCH','Preemptive'),
	('PREEMPTIVE_OS_VERIFYSIGNATURE','Preemptive'),
	('PREEMPTIVE_OS_VERIFYTRUST','Preemptive'),
	('PREEMPTIVE_OS_VSSOPS','Preemptive'),
	('PREEMPTIVE_OS_WAITFORSINGLEOBJECT','Preemptive'),
	('PREEMPTIVE_OS_WINSOCKOPS','Preemptive'),
	('PREEMPTIVE_OS_WRITEFILE','Preemptive'),
	('PREEMPTIVE_OS_WRITEFILEGATHER','Preemptive'),
	('PREEMPTIVE_OS_WSASETLASTERROR','Preemptive'),
	('PREEMPTIVE_REENLIST','Preemptive'),
	('PREEMPTIVE_RESIZELOG','Preemptive'),
	('PREEMPTIVE_ROLLFORWARDREDO','Preemptive'),
	('PREEMPTIVE_ROLLFORWARDUNDO','Preemptive'),
	('PREEMPTIVE_SB_STOPENDPOINT','Preemptive'),
	('PREEMPTIVE_SERVER_STARTUP','Preemptive'),
	('PREEMPTIVE_SETRMINFO','Preemptive'),
	('PREEMPTIVE_SHAREDMEM_GETDATA','Preemptive'),
	('PREEMPTIVE_SNIOPEN','Preemptive'),
	('PREEMPTIVE_SOSHOST','Preemptive'),
	('PREEMPTIVE_SOSTESTING','Preemptive'),
	('PREEMPTIVE_SP_SERVER_DIAGNOSTICS','Preemptive'),
	('PREEMPTIVE_STARTRM','Preemptive'),
	('PREEMPTIVE_STREAMFCB_CHECKPOINT','Preemptive'),
	('PREEMPTIVE_STREAMFCB_RECOVER','Preemptive'),
	('PREEMPTIVE_STRESSDRIVER','Preemptive'),
	('PREEMPTIVE_TESTING','Preemptive'),
	('PREEMPTIVE_TRANSIMPORT','Preemptive'),
	('PREEMPTIVE_UNMARSHALPROPAGATIONTOKEN','Preemptive'),
	('PREEMPTIVE_VSS_CREATESNAPSHOT','Preemptive'),
	('PREEMPTIVE_VSS_CREATEVOLUMESNAPSHOT','Preemptive'),
	('PREEMPTIVE_XE_CALLBACKEXECUTE','Preemptive'),
	('PREEMPTIVE_XE_CX_FILE_OPEN','Preemptive'),
	('PREEMPTIVE_XE_CX_HTTP_CALL','Preemptive'),
	('PREEMPTIVE_XE_DISPATCHER','Preemptive'),
	('PREEMPTIVE_XE_ENGINEINIT','Preemptive'),
	('PREEMPTIVE_XE_GETTARGETSTATE','Preemptive'),
	('PREEMPTIVE_XE_SESSIONCOMMIT','Preemptive'),
	('PREEMPTIVE_XE_TARGETFINALIZE','Preemptive'),
	('PREEMPTIVE_XE_TARGETINIT','Preemptive'),
	('PREEMPTIVE_XE_TIMERRUN','Preemptive'),
	('PREEMPTIVE_XETESTING','Preemptive'),
	('PWAIT_HADR_ACTION_COMPLETED','Replication'),
	('PWAIT_HADR_CHANGE_NOTIFIER_TERMINATION_SYNC','Replication'),
	('PWAIT_HADR_CLUSTER_INTEGRATION','Replication'),
	('PWAIT_HADR_FAILOVER_COMPLETED','Replication'),
	('PWAIT_HADR_JOIN','Replication'),
	('PWAIT_HADR_OFFLINE_COMPLETED','Replication'),
	('PWAIT_HADR_ONLINE_COMPLETED','Replication'),
	('PWAIT_HADR_POST_ONLINE_COMPLETED','Replication'),
	('PWAIT_HADR_SERVER_READY_CONNECTIONS','Replication'),
	('PWAIT_HADR_WORKITEM_COMPLETED','Replication'),
	('PWAIT_HADRSIM','Replication'),
	('PWAIT_RESOURCE_SEMAPHORE_FT_PARALLEL_QUERY_SYNC','Full Text Search'),
	('QUERY_TRACEOUT','Tracing'),
	('REPL_CACHE_ACCESS','Replication'),
	('REPL_HISTORYCACHE_ACCESS','Replication'),
	('REPL_SCHEMA_ACCESS','Replication'),
	('REPL_TRANFSINFO_ACCESS','Replication'),
	('REPL_TRANHASHTABLE_ACCESS','Replication'),
	('REPL_TRANTEXTINFO_ACCESS','Replication'),
	('REPLICA_WRITES','Replication'),
	('REQUEST_FOR_DEADLOCK_SEARCH','Idle'),
	('RESERVED_MEMORY_ALLOCATION_EXT','Memory'),
	('RESOURCE_SEMAPHORE','Memory'),
	('RESOURCE_SEMAPHORE_QUERY_COMPILE','Compilation'),
	('SLEEP_BPOOL_FLUSH','Idle'),
	('SLEEP_BUFFERPOOL_HELPLW','Idle'),
	('SLEEP_DBSTARTUP','Idle'),
	('SLEEP_DCOMSTARTUP','Idle'),
	('SLEEP_MASTERDBREADY','Idle'),
	('SLEEP_MASTERMDREADY','Idle'),
	('SLEEP_MASTERUPGRADED','Idle'),
	('SLEEP_MEMORYPOOL_ALLOCATEPAGES','Idle'),
	('SLEEP_MSDBSTARTUP','Idle'),
	('SLEEP_RETRY_VIRTUALALLOC','Idle'),
	('SLEEP_SYSTEMTASK','Idle'),
	('SLEEP_TASK','Idle'),
	('SLEEP_TEMPDBSTARTUP','Idle'),
	('SLEEP_WORKSPACE_ALLOCATEPAGE','Idle'),
	('SOS_SCHEDULER_YIELD','CPU'),
	('SQLCLR_APPDOMAIN','SQL CLR'),
	('SQLCLR_ASSEMBLY','SQL CLR'),
	('SQLCLR_DEADLOCK_DETECTION','SQL CLR'),
	('SQLCLR_QUANTUM_PUNISHMENT','SQL CLR'),
	('SQLTRACE_BUFFER_FLUSH','Idle'),
	('SQLTRACE_FILE_BUFFER','Tracing'),
	('SQLTRACE_FILE_READ_IO_COMPLETION','Tracing'),
	('SQLTRACE_FILE_WRITE_IO_COMPLETION','Tracing'),
	('SQLTRACE_INCREMENTAL_FLUSH_SLEEP','Idle'),
	('SQLTRACE_PENDING_BUFFER_WRITERS','Tracing'),
	('SQLTRACE_SHUTDOWN','Tracing'),
	('SQLTRACE_WAIT_ENTRIES','Idle'),
	('THREADPOOL','Worker Thread'),
	('TRACE_EVTNOTIF','Tracing'),
	('TRACEWRITE','Tracing'),
	('TRAN_MARKLATCH_DT','Transaction'),
	('TRAN_MARKLATCH_EX','Transaction'),
	('TRAN_MARKLATCH_KP','Transaction'),
	('TRAN_MARKLATCH_NL','Transaction'),
	('TRAN_MARKLATCH_SH','Transaction'),
	('TRAN_MARKLATCH_UP','Transaction'),
	('TRANSACTION_MUTEX','Transaction'),
	('WAIT_FOR_RESULTS','User Wait'),
	('WAITFOR','User Wait'),
	('WRITE_COMPLETION','Other Disk IO'),
	('WRITELOG','Tran Log IO'),
	('XACT_OWN_TRANSACTION','Transaction'),
	('XACT_RECLAIM_SESSION','Transaction'),
	('XACTLOCKINFO','Transaction'),
	('XACTWORKSPACE_MUTEX','Transaction'),
	('XE_DISPATCHER_WAIT','Idle'),
	('XE_TIMER_EVENT','Idle')
) AS wc([wait_type], [wait_category])
	ON ws.[wait_type] = wc.[wait_type]
WHERE
	ws.[wait_type] NOT IN (
		N'BROKER_EVENTHANDLER', N'BROKER_RECEIVE_WAITFOR', N'BROKER_TASK_STOP',
		N'BROKER_TO_FLUSH', N'BROKER_TRANSMITTER', N'CHECKPOINT_QUEUE',
		N'CHKPT', N'CLR_AUTO_EVENT', N'CLR_MANUAL_EVENT', N'CLR_SEMAPHORE',
		N'DBMIRROR_DBM_EVENT', N'DBMIRROR_EVENTS_QUEUE', N'DBMIRROR_WORKER_QUEUE',
		N'DBMIRRORING_CMD', N'DIRTY_PAGE_POLL', N'DISPATCHER_QUEUE_SEMAPHORE',
		N'EXECSYNC', N'FSAGENT', N'FT_IFTS_SCHEDULER_IDLE_WAIT', N'FT_IFTSHC_MUTEX',
		N'HADR_CLUSAPI_CALL', N'HADR_FILESTREAM_IOMGR_IOCOMPLETION', N'HADR_LOGCAPTURE_WAIT',
		N'HADR_NOTIFICATION_DEQUEUE', N'HADR_TIMER_TASK', N'HADR_WORK_QUEUE',
		N'KSOURCE_WAKEUP', N'LAZYWRITER_SLEEP', N'LOGMGR_QUEUE',
		N'MEMORY_ALLOCATION_EXT', N'ONDEMAND_TASK_QUEUE',
		N'PARALLEL_REDO_WORKER_WAIT_WORK',
		N'PREEMPTIVE_HADR_LEASE_MECHANISM', N'PREEMPTIVE_SP_SERVER_DIAGNOSTICS',
		N'PREEMPTIVE_OS_LIBRARYOPS', N'PREEMPTIVE_OS_COMOPS', N'PREEMPTIVE_OS_CRYPTOPS',
		N'PREEMPTIVE_OS_PIPEOPS','PREEMPTIVE_OS_GENERICOPS', N'PREEMPTIVE_OS_VERIFYTRUST',
		N'PREEMPTIVE_OS_DEVICEOPS',
		N'PREEMPTIVE_XE_CALLBACKEXECUTE', N'PREEMPTIVE_XE_DISPATCHER',
		N'PREEMPTIVE_XE_GETTARGETSTATE', N'PREEMPTIVE_XE_SESSIONCOMMIT',
		N'PREEMPTIVE_XE_TARGETINIT', N'PREEMPTIVE_XE_TARGETFINALIZE',
		N'PWAIT_ALL_COMPONENTS_INITIALIZED', N'PWAIT_DIRECTLOGCONSUMER_GETNEXT',
		N'QDS_PERSIST_TASK_MAIN_LOOP_SLEEP',
		N'QDS_ASYNC_QUEUE',
		N'QDS_CLEANUP_STALE_QUERIES_TASK_MAIN_LOOP_SLEEP', N'REQUEST_FOR_DEADLOCK_SEARCH',
		N'RESOURCE_QUEUE', N'SERVER_IDLE_CHECK', N'SLEEP_BPOOL_FLUSH', N'SLEEP_DBSTARTUP',
		N'SLEEP_DCOMSTARTUP', N'SLEEP_MASTERDBREADY', N'SLEEP_MASTERMDREADY',
		N'SLEEP_MASTERUPGRADED', N'SLEEP_MSDBSTARTUP', N'SLEEP_SYSTEMTASK', N'SLEEP_TASK',
		N'SLEEP_TEMPDBSTARTUP', N'SNI_HTTP_ACCEPT', N'SP_SERVER_DIAGNOSTICS_SLEEP',
		N'SQLTRACE_BUFFER_FLUSH', N'SQLTRACE_INCREMENTAL_FLUSH_SLEEP',
		N'SQLTRACE_WAIT_ENTRIES',
		N'WAIT_FOR_RESULTS', N'WAITFOR', N'WAITFOR_TASKSHUTDOWN', N'WAIT_XTP_HOST_WAIT',
		N'WAIT_XTP_OFFLINE_CKPT_NEW_LOG', N'WAIT_XTP_CKPT_CLOSE',
		N'XE_BUFFERMGR_ALLPROCESSED_EVENT', N'XE_DISPATCHER_JOIN',
		N'XE_DISPATCHER_WAIT', N'XE_LIVE_TARGET_TVF', N'XE_TIMER_EVENT',
		N'SOS_WORK_DISPATCHER','RESERVED_MEMORY_ALLOCATION_EXT'
	)
	AND ws.[waiting_tasks_count] > 0
	AND ws.[wait_time_ms] > 100
`

const sqlServerRequests string = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int) * 100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(max) = ''

IF @MajorMinorVersion >= 1200 BEGIN
	SET @Columns = '
	,DB_NAME(COALESCE(r.[database_id], s.[database_id])) AS [session_db_name]
	,COALESCE(r.[open_transaction_count], s.[open_transaction_count]) AS [open_transaction]'
END
ELSE BEGIN
	SET @Columns = '
	,DB_NAME(r.[database_id]) AS [session_db_name]
	,r.[open_transaction_count] AS [open_transaction]'
END

SET @SqlStatement = N'
SELECT [blocking_session_id] into #blockingSessions FROM sys.dm_exec_requests WHERE [blocking_session_id] != 0
CREATE INDEX ix_blockingSessions_1 ON #blockingSessions ([blocking_session_id])

SELECT
	 ''sqlserver_requests'' AS [measurement]
	,REPLACE(@@SERVERNAME,''\'','':'') AS [sql_instance]
	,s.session_id
	,ISNULL(r.[request_id], 0) AS [request_id]
	,COALESCE(r.[status], s.[status]) AS [status]
	,COALESCE(r.[cpu_time], s.[cpu_time]) AS [cpu_time_ms]
	,COALESCE(r.[total_elapsed_time], s.total_elapsed_time) AS [total_elapsed_time_ms]
	,COALESCE(r.[logical_reads], s.[logical_reads]) AS [logical_reads]
	,COALESCE(r.[writes], s.[writes]) AS [writes]
	,r.[command]
	,r.[wait_time] AS [wait_time_ms]
	,r.[wait_type]
	,r.[wait_resource]
	,r.[blocking_session_id]
	,s.[program_name]
	,s.[host_name]
	,s.[nt_user_name]
	,s.[login_name]
	,LEFT (CASE COALESCE(r.[transaction_isolation_level], s.[transaction_isolation_level])
		WHEN 0 THEN ''0-Read Committed''
		WHEN 1 THEN ''1-Read Uncommitted (NOLOCK)''
		WHEN 2 THEN ''2-Read Committed''
		WHEN 3 THEN ''3-Repeatable Read''
		WHEN 4 THEN ''4-Serializable''
		WHEN 5 THEN ''5-Snapshot''
		ELSE CONVERT (varchar(30), r.[transaction_isolation_level]) + ''-UNKNOWN''
	END, 30) AS [transaction_isolation_level]
	,r.[granted_query_memory] AS [granted_query_memory_pages]
	,r.[percent_complete]
	,SUBSTRING(
		qt.[text],
		r.[statement_start_offset] / 2 + 1,
		(CASE WHEN r.[statement_end_offset] = -1
			  THEN DATALENGTH(qt.[text])
			  ELSE r.[statement_end_offset]
		 END - r.[statement_start_offset]) / 2 + 1
	) AS [statement_text]
	,qt.[objectid]
	,QUOTENAME(OBJECT_SCHEMA_NAME(qt.[objectid], qt.[dbid])) + ''.'' +  QUOTENAME(OBJECT_NAME(qt.[objectid], qt.[dbid])) AS [stmt_object_name]
	,DB_NAME(qt.dbid) AS [stmt_db_name]
	,CONVERT(varchar(20),[query_hash],1) AS [query_hash]
	,CONVERT(varchar(20),[query_plan_hash],1) AS [query_plan_hash]'
	+ @Columns + N'
FROM sys.dm_exec_sessions AS s
LEFT OUTER JOIN sys.dm_exec_requests AS r
	ON s.[session_id] = r.[session_id]
OUTER APPLY sys.dm_exec_sql_text(r.[sql_handle]) AS qt
WHERE
	(s.[session_id] IN (SELECT blocking_session_id FROM #blockingSessions))
	OR (
		r.[session_id] IS NOT NULL
		AND (
			s.is_user_process = 1 
			OR r.[status] COLLATE Latin1_General_BIN NOT IN (''background'', ''sleeping'')
		)
	)
OPTION(MAXDOP 1)'

EXEC sp_executesql @SqlStatement
`

const sqlServerVolumeSpace string = `
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 >= 1050 BEGIN
	SELECT DISTINCT
		'sqlserver_volume_space' AS [measurement]
		,SERVERPROPERTY('MachineName') AS [server_name]
		,REPLACE(@@SERVERNAME,'\',':') AS [sql_instance]
		/*in [volume_mount_point] any trailing "\" char will be removed by telegraf */
		,vs.[volume_mount_point]
		,vs.[total_bytes] AS [total_space_bytes]
		,vs.[available_bytes] AS [available_space_bytes]
		,vs.[total_bytes] - vs.[available_bytes] AS [used_space_bytes]
	FROM sys.master_files AS mf
	CROSS APPLY sys.dm_os_volume_stats(mf.[database_id], mf.[file_id]) AS vs
END
`

const sqlServerRingBufferCPU string = `
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;

WITH utilization_cte AS
(
	SELECT
		 [SQLProcessUtilization] AS [sqlserver_process_cpu]
		,[SystemIdle] AS [system_idle_cpu]
		,100 - [SystemIdle] - [SQLProcessUtilization] AS [other_process_cpu]
	FROM (
		SELECT TOP 1
			 [record_id]
			,[SQLProcessUtilization]
			,[SystemIdle]
		FROM (
			SELECT
				 record.value('(./Record/@id)[1]', 'int') AS [record_id]
				,record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)[1]', 'int') AS [SystemIdle]
				,record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]', 'int') AS [SQLProcessUtilization]
				,[TIMESTAMP]
			FROM (
				SELECT
					 [TIMESTAMP]
					,convert(XML, [record]) AS [record]
				FROM sys.dm_os_ring_buffers
				WHERE
					[ring_buffer_type] = N'RING_BUFFER_SCHEDULER_MONITOR'
					AND [record] LIKE '%<SystemHealth>%'
				) AS x
			) AS y
		ORDER BY [record_id] DESC
	) AS z
),
processor_Info_cte AS
(
	SELECT ([cpu_count] / [hyperthread_ratio]) as [number_of_physical_cpus]
	FROM sys.dm_os_sys_info
)
SELECT
	'sqlserver_cpu' AS [measurement]
	,REPLACE(@@SERVERNAME,'\',':') AS [sql_instance]
	,[sqlserver_process_cpu]
	,[system_idle_cpu]
	,100 - [system_idle_cpu] - [sqlserver_process_cpu] AS [other_process_cpu]
FROM (
	SELECT
		(CASE
			WHEN u.[other_process_cpu] < 0 THEN u.[sqlserver_process_cpu] / p.[number_of_physical_cpus]
			ELSE u.[sqlserver_process_cpu]
		END) AS [sqlserver_process_cpu]
		,u.[system_idle_cpu]
	FROM utilization_cte AS u
		CROSS APPLY processor_Info_cte AS p
	) AS b
`

// Collects availability replica state information from `sys.dm_hadr_availability_replica_states` for a High Availability / Disaster Recovery (HADR) setup
// Certain fields are only supported on SQL Server 2016 and newer version, identified by check MajorMinorVersion >= 1300
const sqlServerAvailabilityReplicaStates string = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(MAX) = ''

IF @MajorMinorVersion >= 1300 BEGIN
	SET @Columns += N'
	,ag.basic_features
	,ag.is_distributed
	,ar.seeding_mode
	,ar.seeding_mode_desc'
END

SET @SqlStatement = N'
IF SERVERPROPERTY(''IsHadrEnabled'') = 1 BEGIN
	SELECT
		''sqlserver_hadr_replica_states'' AS [measurement]
		,REPLACE(@@SERVERNAME, ''\'', '':'') AS [sql_instance]
		,convert(nvarchar(36), hars.replica_id) as replica_id
		,ar.replica_server_name
		,convert(nvarchar(36), hars.group_id) as group_id
		,ag.name AS group_name
		,hags.synchronization_health_desc AS ag_synchronization_health_desc
		,ar.replica_metadata_id
		,ar.availability_mode
		,ar.availability_mode_desc
		,ar.failover_mode
		,ar.failover_mode_desc
		,ar.session_timeout
		,ar.primary_role_allow_connections
		,ar.primary_role_allow_connections_desc
		,ar.secondary_role_allow_connections
		,ar.secondary_role_allow_connections_desc
		,hars.is_local
		,hars.role
		,hars.role_desc
		,hars.operational_state
		,hars.operational_state_desc
		,hars.connected_state
		,hars.connected_state_desc
		,hars.recovery_health
		,hars.recovery_health_desc
		,hars.synchronization_health AS replica_synchronization_health
		,hars.synchronization_health_desc AS replica_synchronization_health_desc
		,hars.last_connect_error_number
		,hars.last_connect_error_description
		,hars.last_connect_error_timestamp'
		+ @Columns + N'
	FROM sys.dm_hadr_availability_replica_states AS hars
	INNER JOIN sys.availability_replicas AS ar on hars.replica_id = ar.replica_id
	INNER JOIN sys.availability_groups AS ag on ar.group_id = ag.group_id
	INNER JOIN sys.dm_hadr_availability_group_states AS hags ON hags.group_id = ag.group_id
END'

EXEC sp_executesql @SqlStatement
`

// Collects database replica state information from `sys.dm_hadr_database_replica_states` for a High Availability / Disaster Recovery (HADR) setup
// Certain fields are only supported on SQL Server 2016 and newer version, or SQL Server 2014 and newer, identified by check MajorMinorVersion >= 1300 or MajorMinorVersion >= 1200
const sqlServerDatabaseReplicaStates string = `
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
	 @SqlStatement AS nvarchar(max)
	,@MajorMinorVersion AS int = CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),4) AS int)*100 + CAST(PARSENAME(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar),3) AS int)
	,@Columns AS nvarchar(MAX) = ''

IF @MajorMinorVersion >= 1200 BEGIN
	SET @Columns += N'
	,is_primary_replica'
END

IF @MajorMinorVersion >= 1300 BEGIN
	SET @Columns += N'
	,secondary_lag_seconds'
END

SET @SqlStatement = N'
IF SERVERPROPERTY(''IsHadrEnabled'') = 1 BEGIN
	SELECT
		''sqlserver_hadr_dbreplica_states'' AS [measurement]
		,REPLACE(@@SERVERNAME,''\'','':'') AS [sql_instance]
		,database_id
		,db_name(database_id) as database_name
		,convert(nvarchar(36), drs.replica_id) as replica_id
		,ar.replica_server_name
		,convert(nvarchar(36), drs.group_database_id) as group_database_id
		,synchronization_state
		,synchronization_state_desc
		,is_commit_participant
		,synchronization_health
		,synchronization_health_desc
		,database_state
		,database_state_desc
		,is_suspended
		,suspend_reason
		,suspend_reason_desc
		,last_sent_time
		,last_received_time
		,last_hardened_time
		,last_redone_time
		,log_send_queue_size
		,log_send_rate
		,redo_queue_size
		,redo_rate
		,filestream_send_rate
		,last_commit_time'
		+ @Columns + N'
	FROM sys.dm_hadr_database_replica_states AS drs
	INNER JOIN sys.availability_replicas AS ar on drs.replica_id = ar.replica_id
END'

EXEC sp_executesql @SqlStatement
`
