IndexOptimize.sql

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[IndexOptimize]') AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'CREATE PROCEDURE [dbo].[IndexOptimize] AS'
END
GO

ALTER PROCEDURE [dbo].[IndexOptimize]

@Databases nvarchar(max) = NULL,
@FragmentationLow nvarchar(max) = NULL,
@FragmentationMedium nvarchar(max) = 'INDEX_REORGANIZE,INDEX_REBUILD_ONLINE,INDEX_REBUILD_OFFLINE',
@FragmentationHigh nvarchar(max) = 'INDEX_REBUILD_ONLINE,INDEX_REBUILD_OFFLINE',
@FragmentationLevel1 int = 5,
@FragmentationLevel2 int = 30,
@MinNumberOfPages int = 1000,
@MaxNumberOfPages int = NULL,
@SortInTempdb nvarchar(max) = 'N',
@MaxDOP int = NULL,
@FillFactor int = NULL,
@PadIndex nvarchar(max) = NULL,
@LOBCompaction nvarchar(max) = 'Y',
@UpdateStatistics nvarchar(max) = NULL,
@OnlyModifiedStatistics nvarchar(max) = 'N',
@StatisticsModificationLevel int = NULL,
@StatisticsSample int = NULL,
@StatisticsResample nvarchar(max) = 'N',
@PartitionLevel nvarchar(max) = 'Y',
@MSShippedObjects nvarchar(max) = 'N',
@Indexes nvarchar(max) = NULL,
@IndexTypes nvarchar(max) = 'ALL',  -- ALL, CLUSTERED, NONCLUSTERED
@TimeLimit int = NULL,
@Delay int = NULL,
@WaitAtLowPriorityMaxDuration int = NULL,
@WaitAtLowPriorityAbortAfterWait nvarchar(max) = NULL,
@Resumable nvarchar(max) = 'N',
@AvailabilityGroups nvarchar(max) = NULL,
@LockTimeout int = NULL,
@LockMessageSeverity int = 16,
@StringDelimiter nvarchar(max) = ',',
@DatabaseOrder nvarchar(max) = NULL,
@DatabasesInParallel nvarchar(max) = 'N',
@ExecuteAsUser nvarchar(max) = NULL,
@LogToTable nvarchar(max) = 'N',
@Execute nvarchar(max) = 'Y'

AS

BEGIN

  ----------------------------------------------------------------------------------------------------
  --// Source:  https://ola.hallengren.com                                                        //--
  --// License: https://ola.hallengren.com/license.html                                           //--
  --// GitHub:  https://github.com/olahallengren/sql-server-maintenance-solution                  //--
  --// Version: 2026-03-31 05:54:40                                                               //--
  ----------------------------------------------------------------------------------------------------

  SET NOCOUNT ON

  SET ARITHABORT ON

  SET NUMERIC_ROUNDABORT OFF

  DECLARE @StartMessage nvarchar(max)
  DECLARE @EndMessage nvarchar(max)
  DECLARE @DatabaseMessage nvarchar(max)
  DECLARE @ErrorMessage nvarchar(max)
  DECLARE @Severity int

  DECLARE @StartTime datetime2 = SYSDATETIME()
  DECLARE @SchemaName nvarchar(max) = OBJECT_SCHEMA_NAME(@@PROCID)
  DECLARE @ObjectName nvarchar(max) = OBJECT_NAME(@@PROCID)
  DECLARE @VersionTimestamp nvarchar(max) = SUBSTRING(OBJECT_DEFINITION(@@PROCID),CHARINDEX('--// Version: ',OBJECT_DEFINITION(@@PROCID)) + LEN('--// Version: ') + 1, 19)
  DECLARE @Parameters nvarchar(max)

  DECLARE @HostPlatform nvarchar(max)

  DECLARE @PartitionLevelStatistics bit

  DECLARE @QueueID int
  DECLARE @QueueStartTime datetime2

  DECLARE @CurrentDBID int
  DECLARE @CurrentDatabaseName nvarchar(max)

  DECLARE @CurrentDatabase_sp_executesql nvarchar(max)

  DECLARE @CurrentExecuteAsUserExists bit
  DECLARE @CurrentUserAccess nvarchar(max)
  DECLARE @CurrentIsReadOnly bit
  DECLARE @CurrentDatabaseState nvarchar(max)
  DECLARE @CurrentInStandby bit
  DECLARE @CurrentRecoveryModel nvarchar(max)

  DECLARE @CurrentReplicaID uniqueidentifier
  DECLARE @CurrentAvailabilityGroupID uniqueidentifier
  DECLARE @CurrentAvailabilityGroup nvarchar(max)
  DECLARE @CurrentAvailabilityGroupRole nvarchar(max)
  DECLARE @CurrentDatabaseMirroringRole nvarchar(max)

  DECLARE @CurrentDatabaseContext nvarchar(max)
  DECLARE @CurrentCommand nvarchar(max)
  DECLARE @CurrentCommandOutput int
  DECLARE @CurrentCommandType nvarchar(max)
  DECLARE @CurrentComment nvarchar(max)
  DECLARE @CurrentExtendedInfo xml

  DECLARE @Errors TABLE (ID int IDENTITY PRIMARY KEY,
                         [Message] nvarchar(max) NOT NULL,
                         Severity int NOT NULL,
                         [State] int)

  DECLARE @CurrentMessage nvarchar(max)
  DECLARE @CurrentSeverity int
  DECLARE @CurrentState int

  DECLARE @CurrentIxID int
  DECLARE @CurrentIxOrder int
  DECLARE @CurrentSchemaID int
  DECLARE @CurrentSchemaName nvarchar(max)
  DECLARE @CurrentObjectID int
  DECLARE @CurrentObjectName nvarchar(max)
  DECLARE @CurrentObjectType nvarchar(max)
  DECLARE @CurrentIsMemoryOptimized bit
  DECLARE @CurrentIndexID int
  DECLARE @CurrentIndexName nvarchar(max)
  DECLARE @CurrentIndexType int
  DECLARE @CurrentStatisticsID int
  DECLARE @CurrentStatisticsName nvarchar(max)
  DECLARE @CurrentPartitionID bigint
  DECLARE @CurrentPartitionNumber int
  DECLARE @CurrentPartitionCount int
  DECLARE @CurrentIsPartition bit
  DECLARE @CurrentIndexExists bit
  DECLARE @CurrentStatisticsExists bit
  DECLARE @CurrentIsImageText bit
  DECLARE @CurrentIsNewLOB bit
  DECLARE @CurrentIsFileStream bit
  DECLARE @CurrentHasClusteredColumnstore bit
  DECLARE @CurrentHasNonClusteredColumnstore bit
  DECLARE @CurrentIsComputed bit
  DECLARE @CurrentIsClusteredIndexComputed bit
  DECLARE @CurrentIsTimestamp bit
  DECLARE @CurrentAllowPageLocks bit
  DECLARE @CurrentHasFilter bit
  DECLARE @CurrentNoRecompute bit
  DECLARE @CurrentIsIncremental bit
  DECLARE @CurrentRowCount bigint
  DECLARE @CurrentModificationCounter bigint
  DECLARE @CurrentOnReadOnlyFileGroup bit
  DECLARE @CurrentResumableIndexOperation bit
  DECLARE @CurrentFragmentationLevel float
  DECLARE @CurrentPageCount bigint
  DECLARE @CurrentFragmentationGroup nvarchar(max)
  DECLARE @CurrentAction nvarchar(max)
  DECLARE @CurrentMaxDOP int
  DECLARE @CurrentUpdateStatistics nvarchar(max)
  DECLARE @CurrentStatisticsSample int
  DECLARE @CurrentStatisticsResample nvarchar(max)
  DECLARE @CurrentDelay datetime

  DECLARE @tmpDatabases TABLE (ID int IDENTITY,
                               DatabaseName nvarchar(max),
                               DatabaseType nvarchar(max),
                               AvailabilityGroup bit,
                               StartPosition int,
                               DatabaseSize bigint,
                               [Order] int,
                               Selected bit,
                               Completed bit,
                               PRIMARY KEY(Selected, Completed, [Order], ID))

  DECLARE @tmpAvailabilityGroups TABLE (ID int IDENTITY PRIMARY KEY,
                                        AvailabilityGroupName nvarchar(max),
                                        StartPosition int,
                                        Selected bit)

  DECLARE @tmpDatabasesAvailabilityGroups TABLE (DatabaseName nvarchar(max),
                                                 AvailabilityGroupName nvarchar(max))

  DECLARE @tmpIndexesStatistics TABLE (ID int IDENTITY,
                                       SchemaID int,
                                       SchemaName nvarchar(max),
                                       ObjectID int,
                                       ObjectName nvarchar(max),
                                       ObjectType nvarchar(max),
                                       IsMemoryOptimized bit,
                                       IndexID int,
                                       IndexName nvarchar(max),
                                       IndexType int,
                                       AllowPageLocks bit,
                                       HasFilter bit,
                                       IsImageText bit,
                                       IsNewLOB bit,
                                       IsFileStream bit,
                                       HasClusteredColumnstore bit,
                                       HasNonClusteredColumnstore bit,
                                       IsComputed bit,
                                       IsClusteredIndexComputed bit,
                                       IsTimestamp bit,
                                       OnReadOnlyFileGroup bit,
                                       ResumableIndexOperation bit,
                                       StatisticsID int,
                                       StatisticsName nvarchar(max),
                                       [NoRecompute] bit,
                                       IsIncremental bit,
                                       PartitionID bigint,
                                       PartitionNumber int,
                                       PartitionCount int,
                                       StartPosition int,
                                       [Order] int,
                                       Selected bit,
                                       Completed bit,
                                       PRIMARY KEY(Selected, Completed, [Order], ID))

  DECLARE @SelectedDatabases TABLE (DatabaseName nvarchar(max),
                                    DatabaseType nvarchar(max),
                                    AvailabilityGroup nvarchar(max),
                                    StartPosition int,
                                    Selected bit)

  DECLARE @SelectedAvailabilityGroups TABLE (AvailabilityGroupName nvarchar(max),
                                             StartPosition int,
                                             Selected bit)

  DECLARE @SelectedIndexes TABLE (DatabaseName nvarchar(max),
                                  SchemaName nvarchar(max),
                                  ObjectName nvarchar(max),
                                  IndexName nvarchar(max),
                                  StartPosition int,
                                  Selected bit)

  DECLARE @Actions TABLE ([Action] nvarchar(max))

  INSERT INTO @Actions([Action]) VALUES('INDEX_REBUILD_ONLINE')
  INSERT INTO @Actions([Action]) VALUES('INDEX_REBUILD_OFFLINE')
  INSERT INTO @Actions([Action]) VALUES('INDEX_REORGANIZE')

  DECLARE @ActionsPreferred TABLE (FragmentationGroup nvarchar(max),
                                   [Priority] int,
                                   [Action] nvarchar(max))

  DECLARE @CurrentActionsAllowed TABLE ([Action] nvarchar(max))

  DECLARE @CurrentAlterIndexWithClauseArguments TABLE (ID int IDENTITY,
                                                       Argument nvarchar(max),
                                                       Added bit DEFAULT 0)

  DECLARE @CurrentAlterIndexArgumentID int
  DECLARE @CurrentAlterIndexArgument nvarchar(max)
  DECLARE @CurrentAlterIndexWithClause nvarchar(max)

  DECLARE @CurrentUpdateStatisticsWithClauseArguments TABLE (ID int IDENTITY,
                                                             Argument nvarchar(max),
                                                             Added bit DEFAULT 0)

  DECLARE @CurrentUpdateStatisticsArgumentID int
  DECLARE @CurrentUpdateStatisticsArgument nvarchar(max)
  DECLARE @CurrentUpdateStatisticsWithClause nvarchar(max)

  DECLARE @Error int = 0
  DECLARE @ReturnCode int = 0

  DECLARE @EmptyLine nvarchar(max) = CHAR(9)

  DECLARE @Version numeric(18,10) = CAST(LEFT(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max)),CHARINDEX('.',CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max))) - 1) + '.' + REPLACE(RIGHT(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max)), LEN(CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max))) - CHARINDEX('.',CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max)))),'.','') AS numeric(18,10))

  IF @Version >= 14
  BEGIN
    SELECT @HostPlatform = host_platform
    FROM sys.dm_os_host_info
  END
  ELSE
  BEGIN
    SET @HostPlatform = 'Windows'
  END

  DECLARE @AmazonRDS bit = CASE WHEN SERVERPROPERTY('EngineEdition') IN (5, 8) THEN 0 WHEN EXISTS (SELECT * FROM sys.databases WHERE [name] = 'rdsadmin') AND SUSER_SNAME(0x01) = 'rdsa' THEN 1 ELSE 0 END

  ----------------------------------------------------------------------------------------------------
  --// Log initial information                                                                    //--
  ----------------------------------------------------------------------------------------------------

  SET @Parameters = '@Databases = ' + ISNULL('''' + REPLACE(@Databases,'''','''''') + '''','NULL')
  SET @Parameters += ', @FragmentationLow = ' + ISNULL('''' + REPLACE(@FragmentationLow,'''','''''') + '''','NULL')
  SET @Parameters += ', @FragmentationMedium = ' + ISNULL('''' + REPLACE(@FragmentationMedium,'''','''''') + '''','NULL')
  SET @Parameters += ', @FragmentationHigh = ' + ISNULL('''' + REPLACE(@FragmentationHigh,'''','''''') + '''','NULL')
  SET @Parameters += ', @FragmentationLevel1 = ' + ISNULL(CAST(@FragmentationLevel1 AS nvarchar),'NULL')
  SET @Parameters += ', @FragmentationLevel2 = ' + ISNULL(CAST(@FragmentationLevel2 AS nvarchar),'NULL')
  SET @Parameters += ', @MinNumberOfPages = ' + ISNULL(CAST(@MinNumberOfPages AS nvarchar),'NULL')
  SET @Parameters += ', @MaxNumberOfPages = ' + ISNULL(CAST(@MaxNumberOfPages AS nvarchar),'NULL')
  SET @Parameters += ', @SortInTempdb = ' + ISNULL('''' + REPLACE(@SortInTempdb,'''','''''') + '''','NULL')
  SET @Parameters += ', @MaxDOP = ' + ISNULL(CAST(@MaxDOP AS nvarchar),'NULL')
  SET @Parameters += ', @FillFactor = ' + ISNULL(CAST(@FillFactor AS nvarchar),'NULL')
  SET @Parameters += ', @PadIndex = ' + ISNULL('''' + REPLACE(@PadIndex,'''','''''') + '''','NULL')
  SET @Parameters += ', @LOBCompaction = ' + ISNULL('''' + REPLACE(@LOBCompaction,'''','''''') + '''','NULL')
  SET @Parameters += ', @UpdateStatistics = ' + ISNULL('''' + REPLACE(@UpdateStatistics,'''','''''') + '''','NULL')
  SET @Parameters += ', @OnlyModifiedStatistics = ' + ISNULL('''' + REPLACE(@OnlyModifiedStatistics,'''','''''') + '''','NULL')
  SET @Parameters += ', @StatisticsModificationLevel = ' + ISNULL(CAST(@StatisticsModificationLevel AS nvarchar),'NULL')
  SET @Parameters += ', @StatisticsSample = ' + ISNULL(CAST(@StatisticsSample AS nvarchar),'NULL')
  SET @Parameters += ', @StatisticsResample = ' + ISNULL('''' + REPLACE(@StatisticsResample,'''','''''') + '''','NULL')
  SET @Parameters += ', @PartitionLevel = ' + ISNULL('''' + REPLACE(@PartitionLevel,'''','''''') + '''','NULL')
  SET @Parameters += ', @MSShippedObjects = ' + ISNULL('''' + REPLACE(@MSShippedObjects,'''','''''') + '''','NULL')
  SET @Parameters += ', @Indexes = ' + ISNULL('''' + REPLACE(@Indexes,'''','''''') + '''','NULL')
  SET @Parameters += ', @IndexTypes = ' + ISNULL('''' + REPLACE(@IndexTypes,'''','''''') + '''','NULL')
  SET @Parameters += ', @TimeLimit = ' + ISNULL(CAST(@TimeLimit AS nvarchar),'NULL')
  SET @Parameters += ', @Delay = ' + ISNULL(CAST(@Delay AS nvarchar),'NULL')
  SET @Parameters += ', @WaitAtLowPriorityMaxDuration = ' + ISNULL(CAST(@WaitAtLowPriorityMaxDuration AS nvarchar),'NULL')
  SET @Parameters += ', @WaitAtLowPriorityAbortAfterWait = ' + ISNULL('''' + REPLACE(@WaitAtLowPriorityAbortAfterWait,'''','''''') + '''','NULL')
  SET @Parameters += ', @Resumable = ' + ISNULL('''' + REPLACE(@Resumable,'''','''''') + '''','NULL')
  SET @Parameters += ', @AvailabilityGroups = ' + ISNULL('''' + REPLACE(@AvailabilityGroups,'''','''''') + '''','NULL')
  SET @Parameters += ', @LockTimeout = ' + ISNULL(CAST(@LockTimeout AS nvarchar),'NULL')
  SET @Parameters += ', @LockMessageSeverity = ' + ISNULL(CAST(@LockMessageSeverity AS nvarchar),'NULL')
  SET @Parameters += ', @StringDelimiter = ' + ISNULL('''' + REPLACE(@StringDelimiter,'''','''''') + '''','NULL')
  SET @Parameters += ', @DatabaseOrder = ' + ISNULL('''' + REPLACE(@DatabaseOrder,'''','''''') + '''','NULL')
  SET @Parameters += ', @DatabasesInParallel = ' + ISNULL('''' + REPLACE(@DatabasesInParallel,'''','''''') + '''','NULL')
  SET @Parameters += ', @ExecuteAsUser = ' + ISNULL('''' + REPLACE(@ExecuteAsUser,'''','''''') + '''','NULL')
  SET @Parameters += ', @LogToTable = ' + ISNULL('''' + REPLACE(@LogToTable,'''','''''') + '''','NULL')
  SET @Parameters += ', @Execute = ' + ISNULL('''' + REPLACE(@Execute,'''','''''') + '''','NULL')

  SET @StartMessage = 'Date and time: ' + CONVERT(nvarchar,@StartTime,120)
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Server: ' + CAST(SERVERPROPERTY('ServerName') AS nvarchar(max))
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Version: ' + CAST(SERVERPROPERTY('ProductVersion') AS nvarchar(max))
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Edition: ' + CAST(SERVERPROPERTY('Edition') AS nvarchar(max))
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Platform: ' + @HostPlatform
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Procedure: ' + QUOTENAME(DB_NAME()) + '.' + QUOTENAME(@SchemaName) + '.' + QUOTENAME(@ObjectName)
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Parameters: ' + @Parameters
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Version: ' + @VersionTimestamp
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  SET @StartMessage = 'Source: https://ola.hallengren.com'
  RAISERROR('%s',10,1,@StartMessage) WITH NOWAIT

  RAISERROR(@EmptyLine,10,1) WITH NOWAIT

  ----------------------------------------------------------------------------------------------------
  --// Check core requirements                                                                    //--
  ----------------------------------------------------------------------------------------------------

  IF NOT (SELECT [compatibility_level] FROM sys.databases WHERE [name] = DB_NAME()) >= 90
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The database ' + QUOTENAME(DB_NAME()) + ' has to be in compatibility level 90 or higher.', 16, 1
  END

  IF NOT (SELECT uses_ansi_nulls FROM sys.sql_modules WHERE [object_id] = @@PROCID) = 1
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'ANSI_NULLS has to be set to ON for the stored procedure.', 16, 1
  END

  IF NOT (SELECT uses_quoted_identifier FROM sys.sql_modules WHERE [object_id] = @@PROCID) = 1
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'QUOTED_IDENTIFIER has to be set to ON for the stored procedure.', 16, 1
  END

  IF NOT EXISTS (SELECT * FROM sys.objects objects INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] = 'P' AND schemas.[name] = 'dbo' AND objects.[name] = 'CommandExecute')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The stored procedure CommandExecute is missing. Download https://ola.hallengren.com/scripts/CommandExecute.sql.', 16, 1
  END

  IF EXISTS (SELECT * FROM sys.objects objects INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] = 'P' AND schemas.[name] = 'dbo' AND objects.[name] = 'CommandExecute' AND OBJECT_DEFINITION(objects.[object_id]) NOT LIKE '%@DatabaseContext%')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The stored procedure CommandExecute needs to be updated. Download https://ola.hallengren.com/scripts/CommandExecute.sql.', 16, 1
  END

  IF @LogToTable = 'Y' AND NOT EXISTS (SELECT * FROM sys.objects objects INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] = 'U' AND schemas.[name] = 'dbo' AND objects.[name] = 'CommandLog')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The table CommandLog is missing. Download https://ola.hallengren.com/scripts/CommandLog.sql.', 16, 1
  END

  IF @DatabasesInParallel = 'Y' AND NOT EXISTS (SELECT * FROM sys.objects objects INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] = 'U' AND schemas.[name] = 'dbo' AND objects.[name] = 'Queue')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The table Queue is missing. Download https://ola.hallengren.com/scripts/Queue.sql.', 16, 1
  END

  IF @DatabasesInParallel = 'Y' AND NOT EXISTS (SELECT * FROM sys.objects objects INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] = 'U' AND schemas.[name] = 'dbo' AND objects.[name] = 'QueueDatabase')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The table QueueDatabase is missing. Download https://ola.hallengren.com/scripts/QueueDatabase.sql.', 16, 1
  END

  IF @@TRANCOUNT <> 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The transaction count is not 0.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------
  --// Select databases                                                                           //--
  ----------------------------------------------------------------------------------------------------

  SET @Databases = REPLACE(@Databases, CHAR(10), '')
  SET @Databases = REPLACE(@Databases, CHAR(13), '')

  WHILE CHARINDEX(@StringDelimiter + ' ', @Databases) > 0 SET @Databases = REPLACE(@Databases, @StringDelimiter + ' ', @StringDelimiter)
  WHILE CHARINDEX(' ' + @StringDelimiter, @Databases) > 0 SET @Databases = REPLACE(@Databases, ' ' + @StringDelimiter, @StringDelimiter)

  SET @Databases = LTRIM(RTRIM(@Databases));

  WITH Databases1 (StartPosition, EndPosition, DatabaseItem) AS
  (
  SELECT 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Databases, 1), 0), LEN(@Databases) + 1) AS EndPosition,
         SUBSTRING(@Databases, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Databases, 1), 0), LEN(@Databases) + 1) - 1) AS DatabaseItem
  WHERE @Databases IS NOT NULL
  UNION ALL
  SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Databases, EndPosition + 1), 0), LEN(@Databases) + 1) AS EndPosition,
         SUBSTRING(@Databases, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Databases, EndPosition + 1), 0), LEN(@Databases) + 1) - EndPosition - 1) AS DatabaseItem
  FROM Databases1
  WHERE EndPosition < LEN(@Databases) + 1
  ),
  Databases2 (DatabaseItem, StartPosition, Selected) AS
  (
  SELECT CASE WHEN DatabaseItem LIKE '-%' THEN RIGHT(DatabaseItem,LEN(DatabaseItem) - 1) ELSE DatabaseItem END AS DatabaseItem,
         StartPosition,
         CASE WHEN DatabaseItem LIKE '-%' THEN 0 ELSE 1 END AS Selected
  FROM Databases1
  ),
  Databases3 (DatabaseItem, DatabaseType, AvailabilityGroup, StartPosition, Selected) AS
  (
  SELECT CASE WHEN DatabaseItem IN('ALL_DATABASES','SYSTEM_DATABASES','USER_DATABASES','AVAILABILITY_GROUP_DATABASES') THEN '%' ELSE DatabaseItem END AS DatabaseItem,
         CASE WHEN DatabaseItem = 'SYSTEM_DATABASES' THEN 'S' WHEN DatabaseItem = 'USER_DATABASES' THEN 'U' ELSE NULL END AS DatabaseType,
         CASE WHEN DatabaseItem = 'AVAILABILITY_GROUP_DATABASES' THEN 1 ELSE NULL END AvailabilityGroup,
         StartPosition,
         Selected
  FROM Databases2
  ),
  Databases4 (DatabaseName, DatabaseType, AvailabilityGroup, StartPosition, Selected) AS
  (
  SELECT CASE WHEN LEFT(DatabaseItem,1) = '[' AND RIGHT(DatabaseItem,1) = ']' THEN PARSENAME(DatabaseItem,1) ELSE DatabaseItem END AS DatabaseItem,
         DatabaseType,
         AvailabilityGroup,
         StartPosition,
         Selected
  FROM Databases3
  )
  INSERT INTO @SelectedDatabases (DatabaseName, DatabaseType, AvailabilityGroup, StartPosition, Selected)
  SELECT DatabaseName,
         DatabaseType,
         AvailabilityGroup,
         StartPosition,
         Selected
  FROM Databases4
  OPTION (MAXRECURSION 0)

  IF @Version >= 11 AND SERVERPROPERTY('IsHadrEnabled') = 1
  BEGIN
    INSERT INTO @tmpAvailabilityGroups (AvailabilityGroupName, Selected)
    SELECT name AS AvailabilityGroupName,
           0 AS Selected
    FROM sys.availability_groups

    INSERT INTO @tmpDatabasesAvailabilityGroups (DatabaseName, AvailabilityGroupName)
    SELECT databases.name,
           availability_groups.name
    FROM sys.databases databases
    INNER JOIN sys.availability_replicas availability_replicas ON databases.replica_id = availability_replicas.replica_id
    INNER JOIN sys.availability_groups availability_groups ON availability_replicas.group_id = availability_groups.group_id
  END

  INSERT INTO @tmpDatabases (DatabaseName, DatabaseType, AvailabilityGroup, [Order], Selected, Completed)
  SELECT [name] AS DatabaseName,
         CASE WHEN name IN('master','msdb','model') OR is_distributor = 1 THEN 'S' ELSE 'U' END AS DatabaseType,
         NULL AS AvailabilityGroup,
         0 AS [Order],
         0 AS Selected,
         0 AS Completed
  FROM sys.databases
  WHERE [name] <> 'tempdb'
  AND source_database_id IS NULL
  ORDER BY [name] ASC

  UPDATE tmpDatabases
  SET AvailabilityGroup = CASE WHEN EXISTS (SELECT * FROM @tmpDatabasesAvailabilityGroups WHERE DatabaseName = tmpDatabases.DatabaseName) THEN 1 ELSE 0 END
  FROM @tmpDatabases tmpDatabases

  UPDATE tmpDatabases
  SET tmpDatabases.Selected = SelectedDatabases.Selected
  FROM @tmpDatabases tmpDatabases
  INNER JOIN @SelectedDatabases SelectedDatabases
  ON tmpDatabases.DatabaseName LIKE REPLACE(SelectedDatabases.DatabaseName,'_','[_]')
  AND (tmpDatabases.DatabaseType = SelectedDatabases.DatabaseType OR SelectedDatabases.DatabaseType IS NULL)
  AND (tmpDatabases.AvailabilityGroup = SelectedDatabases.AvailabilityGroup OR SelectedDatabases.AvailabilityGroup IS NULL)
  WHERE SelectedDatabases.Selected = 1

  UPDATE tmpDatabases
  SET tmpDatabases.Selected = SelectedDatabases.Selected
  FROM @tmpDatabases tmpDatabases
  INNER JOIN @SelectedDatabases SelectedDatabases
  ON tmpDatabases.DatabaseName LIKE REPLACE(SelectedDatabases.DatabaseName,'_','[_]')
  AND (tmpDatabases.DatabaseType = SelectedDatabases.DatabaseType OR SelectedDatabases.DatabaseType IS NULL)
  AND (tmpDatabases.AvailabilityGroup = SelectedDatabases.AvailabilityGroup OR SelectedDatabases.AvailabilityGroup IS NULL)
  WHERE SelectedDatabases.Selected = 0

  UPDATE tmpDatabases
  SET tmpDatabases.StartPosition = SelectedDatabases2.StartPosition
  FROM @tmpDatabases tmpDatabases
  INNER JOIN (SELECT tmpDatabases.DatabaseName, MIN(SelectedDatabases.StartPosition) AS StartPosition
              FROM @tmpDatabases tmpDatabases
              INNER JOIN @SelectedDatabases SelectedDatabases
              ON tmpDatabases.DatabaseName LIKE REPLACE(SelectedDatabases.DatabaseName,'_','[_]')
              AND (tmpDatabases.DatabaseType = SelectedDatabases.DatabaseType OR SelectedDatabases.DatabaseType IS NULL)
              AND (tmpDatabases.AvailabilityGroup = SelectedDatabases.AvailabilityGroup OR SelectedDatabases.AvailabilityGroup IS NULL)
              WHERE SelectedDatabases.Selected = 1
              GROUP BY tmpDatabases.DatabaseName) SelectedDatabases2
  ON tmpDatabases.DatabaseName = SelectedDatabases2.DatabaseName

  IF @Databases IS NOT NULL AND (NOT EXISTS(SELECT * FROM @SelectedDatabases) OR EXISTS(SELECT * FROM @SelectedDatabases WHERE DatabaseName IS NULL OR DATALENGTH(DatabaseName) = 0))
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Databases is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------
  --// Select availability groups                                                                 //--
  ----------------------------------------------------------------------------------------------------

  IF @AvailabilityGroups IS NOT NULL AND @Version >= 11 AND SERVERPROPERTY('IsHadrEnabled') = 1
  BEGIN

    SET @AvailabilityGroups = REPLACE(@AvailabilityGroups, CHAR(10), '')
    SET @AvailabilityGroups = REPLACE(@AvailabilityGroups, CHAR(13), '')

    WHILE CHARINDEX(@StringDelimiter + ' ', @AvailabilityGroups) > 0 SET @AvailabilityGroups = REPLACE(@AvailabilityGroups, @StringDelimiter + ' ', @StringDelimiter)
    WHILE CHARINDEX(' ' + @StringDelimiter, @AvailabilityGroups) > 0 SET @AvailabilityGroups = REPLACE(@AvailabilityGroups, ' ' + @StringDelimiter, @StringDelimiter)

    SET @AvailabilityGroups = LTRIM(RTRIM(@AvailabilityGroups));

    WITH AvailabilityGroups1 (StartPosition, EndPosition, AvailabilityGroupItem) AS
    (
    SELECT 1 AS StartPosition,
           ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @AvailabilityGroups, 1), 0), LEN(@AvailabilityGroups) + 1) AS EndPosition,
           SUBSTRING(@AvailabilityGroups, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @AvailabilityGroups, 1), 0), LEN(@AvailabilityGroups) + 1) - 1) AS AvailabilityGroupItem
    WHERE @AvailabilityGroups IS NOT NULL
    UNION ALL
    SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
           ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @AvailabilityGroups, EndPosition + 1), 0), LEN(@AvailabilityGroups) + 1) AS EndPosition,
           SUBSTRING(@AvailabilityGroups, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @AvailabilityGroups, EndPosition + 1), 0), LEN(@AvailabilityGroups) + 1) - EndPosition - 1) AS AvailabilityGroupItem
    FROM AvailabilityGroups1
    WHERE EndPosition < LEN(@AvailabilityGroups) + 1
    ),
    AvailabilityGroups2 (AvailabilityGroupItem, StartPosition, Selected) AS
    (
    SELECT CASE WHEN AvailabilityGroupItem LIKE '-%' THEN RIGHT(AvailabilityGroupItem,LEN(AvailabilityGroupItem) - 1) ELSE AvailabilityGroupItem END AS AvailabilityGroupItem,
           StartPosition,
           CASE WHEN AvailabilityGroupItem LIKE '-%' THEN 0 ELSE 1 END AS Selected
    FROM AvailabilityGroups1
    ),
    AvailabilityGroups3 (AvailabilityGroupItem, StartPosition, Selected) AS
    (
    SELECT CASE WHEN AvailabilityGroupItem = 'ALL_AVAILABILITY_GROUPS' THEN '%' ELSE AvailabilityGroupItem END AS AvailabilityGroupItem,
           StartPosition,
           Selected
    FROM AvailabilityGroups2
    ),
    AvailabilityGroups4 (AvailabilityGroupName, StartPosition, Selected) AS
    (
    SELECT CASE WHEN LEFT(AvailabilityGroupItem,1) = '[' AND RIGHT(AvailabilityGroupItem,1) = ']' THEN PARSENAME(AvailabilityGroupItem,1) ELSE AvailabilityGroupItem END AS AvailabilityGroupItem,
           StartPosition,
           Selected
    FROM AvailabilityGroups3
    )
    INSERT INTO @SelectedAvailabilityGroups (AvailabilityGroupName, StartPosition, Selected)
    SELECT AvailabilityGroupName, StartPosition, Selected
    FROM AvailabilityGroups4
    OPTION (MAXRECURSION 0)

    UPDATE tmpAvailabilityGroups
    SET tmpAvailabilityGroups.Selected = SelectedAvailabilityGroups.Selected
    FROM @tmpAvailabilityGroups tmpAvailabilityGroups
    INNER JOIN @SelectedAvailabilityGroups SelectedAvailabilityGroups
    ON tmpAvailabilityGroups.AvailabilityGroupName LIKE REPLACE(SelectedAvailabilityGroups.AvailabilityGroupName,'_','[_]')
    WHERE SelectedAvailabilityGroups.Selected = 1

    UPDATE tmpAvailabilityGroups
    SET tmpAvailabilityGroups.Selected = SelectedAvailabilityGroups.Selected
    FROM @tmpAvailabilityGroups tmpAvailabilityGroups
    INNER JOIN @SelectedAvailabilityGroups SelectedAvailabilityGroups
    ON tmpAvailabilityGroups.AvailabilityGroupName LIKE REPLACE(SelectedAvailabilityGroups.AvailabilityGroupName,'_','[_]')
    WHERE SelectedAvailabilityGroups.Selected = 0

    UPDATE tmpAvailabilityGroups
    SET tmpAvailabilityGroups.StartPosition = SelectedAvailabilityGroups2.StartPosition
    FROM @tmpAvailabilityGroups tmpAvailabilityGroups
    INNER JOIN (SELECT tmpAvailabilityGroups.AvailabilityGroupName, MIN(SelectedAvailabilityGroups.StartPosition) AS StartPosition
                FROM @tmpAvailabilityGroups tmpAvailabilityGroups
                INNER JOIN @SelectedAvailabilityGroups SelectedAvailabilityGroups
                ON tmpAvailabilityGroups.AvailabilityGroupName LIKE REPLACE(SelectedAvailabilityGroups.AvailabilityGroupName,'_','[_]')
                WHERE SelectedAvailabilityGroups.Selected = 1
                GROUP BY tmpAvailabilityGroups.AvailabilityGroupName) SelectedAvailabilityGroups2
    ON tmpAvailabilityGroups.AvailabilityGroupName = SelectedAvailabilityGroups2.AvailabilityGroupName

    UPDATE tmpDatabases
    SET tmpDatabases.StartPosition = tmpAvailabilityGroups.StartPosition,
        tmpDatabases.Selected = 1
    FROM @tmpDatabases tmpDatabases
    INNER JOIN @tmpDatabasesAvailabilityGroups tmpDatabasesAvailabilityGroups ON tmpDatabases.DatabaseName = tmpDatabasesAvailabilityGroups.DatabaseName
    INNER JOIN @tmpAvailabilityGroups tmpAvailabilityGroups ON tmpDatabasesAvailabilityGroups.AvailabilityGroupName = tmpAvailabilityGroups.AvailabilityGroupName
    WHERE tmpAvailabilityGroups.Selected = 1

  END

  IF @AvailabilityGroups IS NOT NULL AND (NOT EXISTS(SELECT * FROM @SelectedAvailabilityGroups) OR EXISTS(SELECT * FROM @SelectedAvailabilityGroups WHERE AvailabilityGroupName IS NULL OR AvailabilityGroupName = '') OR @Version < 11 OR SERVERPROPERTY('IsHadrEnabled') = 0)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @AvailabilityGroups is not supported.', 16, 1
  END

  IF (@Databases IS NULL AND @AvailabilityGroups IS NULL)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'You need to specify one of the parameters @Databases and @AvailabilityGroups.', 16, 2
  END

  IF (@Databases IS NOT NULL AND @AvailabilityGroups IS NOT NULL)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'You can only specify one of the parameters @Databases and @AvailabilityGroups.', 16, 3
  END

  ----------------------------------------------------------------------------------------------------
  --// Select indexes                                                                             //--
  ----------------------------------------------------------------------------------------------------

  SET @Indexes = REPLACE(@Indexes, CHAR(10), '')
  SET @Indexes = REPLACE(@Indexes, CHAR(13), '')

  WHILE CHARINDEX(@StringDelimiter + ' ', @Indexes) > 0 SET @Indexes = REPLACE(@Indexes, @StringDelimiter + ' ', @StringDelimiter)
  WHILE CHARINDEX(' ' + @StringDelimiter, @Indexes) > 0 SET @Indexes = REPLACE(@Indexes, ' ' + @StringDelimiter, @StringDelimiter)

  SET @Indexes = LTRIM(RTRIM(@Indexes));

  WITH Indexes1 (StartPosition, EndPosition, IndexItem) AS
  (
  SELECT 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Indexes, 1), 0), LEN(@Indexes) + 1) AS EndPosition,
         SUBSTRING(@Indexes, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Indexes, 1), 0), LEN(@Indexes) + 1) - 1) AS IndexItem
  WHERE @Indexes IS NOT NULL
  UNION ALL
  SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Indexes, EndPosition + 1), 0), LEN(@Indexes) + 1) AS EndPosition,
         SUBSTRING(@Indexes, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @Indexes, EndPosition + 1), 0), LEN(@Indexes) + 1) - EndPosition - 1) AS IndexItem
  FROM Indexes1
  WHERE EndPosition < LEN(@Indexes) + 1
  ),
  Indexes2 (IndexItem, StartPosition, Selected) AS
  (
  SELECT CASE WHEN IndexItem LIKE '-%' THEN RIGHT(IndexItem,LEN(IndexItem) - 1) ELSE IndexItem END AS IndexItem,
         StartPosition,
         CASE WHEN IndexItem LIKE '-%' THEN 0 ELSE 1 END AS Selected
  FROM Indexes1
  ),
  Indexes3 (IndexItem, StartPosition, Selected) AS
  (
  SELECT CASE WHEN IndexItem = 'ALL_INDEXES' THEN '%.%.%.%' ELSE IndexItem END AS IndexItem,
         StartPosition,
         Selected
  FROM Indexes2
  ),
  Indexes4 (DatabaseName, SchemaName, ObjectName, IndexName, StartPosition, Selected) AS
  (
  SELECT CASE WHEN PARSENAME(IndexItem,4) IS NULL THEN PARSENAME(IndexItem,3) ELSE PARSENAME(IndexItem,4) END AS DatabaseName,
         CASE WHEN PARSENAME(IndexItem,4) IS NULL THEN PARSENAME(IndexItem,2) ELSE PARSENAME(IndexItem,3) END AS SchemaName,
         CASE WHEN PARSENAME(IndexItem,4) IS NULL THEN PARSENAME(IndexItem,1) ELSE PARSENAME(IndexItem,2) END AS ObjectName,
         CASE WHEN PARSENAME(IndexItem,4) IS NULL THEN '%' ELSE PARSENAME(IndexItem,1) END AS IndexName,
         StartPosition,
         Selected
  FROM Indexes3
  )
  INSERT INTO @SelectedIndexes (DatabaseName, SchemaName, ObjectName, IndexName, StartPosition, Selected)
  SELECT DatabaseName, SchemaName, ObjectName, IndexName, StartPosition, Selected
  FROM Indexes4
  OPTION (MAXRECURSION 0)

  ----------------------------------------------------------------------------------------------------
  --// Select actions                                                                             //--
  ----------------------------------------------------------------------------------------------------

  SET @FragmentationLow = REPLACE(@FragmentationLow, @StringDelimiter + ' ', @StringDelimiter);

  WITH FragmentationLow (StartPosition, EndPosition, [Action]) AS
  (
  SELECT 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationLow, 1), 0), LEN(@FragmentationLow) + 1) AS EndPosition,
         SUBSTRING(@FragmentationLow, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationLow, 1), 0), LEN(@FragmentationLow) + 1) - 1) AS [Action]
  WHERE @FragmentationLow IS NOT NULL
  UNION ALL
  SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationLow, EndPosition + 1), 0), LEN(@FragmentationLow) + 1) AS EndPosition,
         SUBSTRING(@FragmentationLow, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationLow, EndPosition + 1), 0), LEN(@FragmentationLow) + 1) - EndPosition - 1) AS [Action]
  FROM FragmentationLow
  WHERE EndPosition < LEN(@FragmentationLow) + 1
  )
  INSERT INTO @ActionsPreferred(FragmentationGroup, [Priority], [Action])
  SELECT 'Low' AS FragmentationGroup,
         ROW_NUMBER() OVER(ORDER BY StartPosition ASC) AS [Priority],
         [Action]
  FROM FragmentationLow
  OPTION (MAXRECURSION 0)

  SET @FragmentationMedium = REPLACE(@FragmentationMedium, @StringDelimiter + ' ', @StringDelimiter);

  WITH FragmentationMedium (StartPosition, EndPosition, [Action]) AS
  (
  SELECT 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationMedium, 1), 0), LEN(@FragmentationMedium) + 1) AS EndPosition,
         SUBSTRING(@FragmentationMedium, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationMedium, 1), 0), LEN(@FragmentationMedium) + 1) - 1) AS [Action]
  WHERE @FragmentationMedium IS NOT NULL
  UNION ALL
  SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationMedium, EndPosition + 1), 0), LEN(@FragmentationMedium) + 1) AS EndPosition,
         SUBSTRING(@FragmentationMedium, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationMedium, EndPosition + 1), 0), LEN(@FragmentationMedium) + 1) - EndPosition - 1) AS [Action]
  FROM FragmentationMedium
  WHERE EndPosition < LEN(@FragmentationMedium) + 1
  )
  INSERT INTO @ActionsPreferred(FragmentationGroup, [Priority], [Action])
  SELECT 'Medium' AS FragmentationGroup,
         ROW_NUMBER() OVER(ORDER BY StartPosition ASC) AS [Priority],
         [Action]
  FROM FragmentationMedium
  OPTION (MAXRECURSION 0)

  SET @FragmentationHigh = REPLACE(@FragmentationHigh, @StringDelimiter + ' ', @StringDelimiter);

  WITH FragmentationHigh (StartPosition, EndPosition, [Action]) AS
  (
  SELECT 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationHigh, 1), 0), LEN(@FragmentationHigh) + 1) AS EndPosition,
         SUBSTRING(@FragmentationHigh, 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationHigh, 1), 0), LEN(@FragmentationHigh) + 1) - 1) AS [Action]
  WHERE @FragmentationHigh IS NOT NULL
  UNION ALL
  SELECT CAST(EndPosition AS int) + 1 AS StartPosition,
         ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationHigh, EndPosition + 1), 0), LEN(@FragmentationHigh) + 1) AS EndPosition,
         SUBSTRING(@FragmentationHigh, EndPosition + 1, ISNULL(NULLIF(CHARINDEX(@StringDelimiter, @FragmentationHigh, EndPosition + 1), 0), LEN(@FragmentationHigh) + 1) - EndPosition - 1) AS [Action]
  FROM FragmentationHigh
  WHERE EndPosition < LEN(@FragmentationHigh) + 1
  )
  INSERT INTO @ActionsPreferred(FragmentationGroup, [Priority], [Action])
  SELECT 'High' AS FragmentationGroup,
         ROW_NUMBER() OVER(ORDER BY StartPosition ASC) AS [Priority],
         [Action]
  FROM FragmentationHigh
  OPTION (MAXRECURSION 0)

  ----------------------------------------------------------------------------------------------------
  --// Check input parameters                                                                     //--
  ----------------------------------------------------------------------------------------------------

  IF EXISTS (SELECT [Action] FROM @ActionsPreferred WHERE FragmentationGroup = 'Low' AND [Action] NOT IN(SELECT * FROM @Actions))
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLow is not supported.', 16, 1
  END

  IF EXISTS (SELECT * FROM @ActionsPreferred WHERE FragmentationGroup = 'Low' GROUP BY [Action] HAVING COUNT(*) > 1)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLow is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF EXISTS (SELECT [Action] FROM @ActionsPreferred WHERE FragmentationGroup = 'Medium' AND [Action] NOT IN(SELECT * FROM @Actions))
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationMedium is not supported.', 16, 1
  END

  IF EXISTS (SELECT * FROM @ActionsPreferred WHERE FragmentationGroup = 'Medium' GROUP BY [Action] HAVING COUNT(*) > 1)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationMedium is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF EXISTS (SELECT [Action] FROM @ActionsPreferred WHERE FragmentationGroup = 'High' AND [Action] NOT IN(SELECT * FROM @Actions))
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationHigh is not supported.', 16, 1
  END

  IF EXISTS (SELECT * FROM @ActionsPreferred WHERE FragmentationGroup = 'High' GROUP BY [Action] HAVING COUNT(*) > 1)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationHigh is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @FragmentationLevel1 <= 0 OR @FragmentationLevel1 >= 100 OR @FragmentationLevel1 IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLevel1 is not supported.', 16, 1
  END

  IF @FragmentationLevel1 >= @FragmentationLevel2
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLevel1 is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @FragmentationLevel2 <= 0 OR @FragmentationLevel2 >= 100 OR @FragmentationLevel2 IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLevel2 is not supported.', 16, 1
  END

  IF @FragmentationLevel2 <= @FragmentationLevel1
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FragmentationLevel2 is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @MinNumberOfPages < 0 OR @MinNumberOfPages IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @MinNumberOfPages is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @MaxNumberOfPages < 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @MaxNumberOfPages is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @SortInTempdb NOT IN('Y','N') OR @SortInTempdb IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @SortInTempdb is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @MaxDOP < 0 OR @MaxDOP > 64
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @MaxDOP is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @FillFactor <= 0 OR @FillFactor > 100
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @FillFactor is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @PadIndex NOT IN('Y','N')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @PadIndex is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @LOBCompaction NOT IN('Y','N') OR @LOBCompaction IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @LOBCompaction is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @UpdateStatistics NOT IN('ALL','COLUMNS','INDEX')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @UpdateStatistics is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @OnlyModifiedStatistics NOT IN('Y','N') OR @OnlyModifiedStatistics IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @OnlyModifiedStatistics is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @StatisticsModificationLevel <= 0 OR @StatisticsModificationLevel > 100
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @StatisticsModificationLevel is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @OnlyModifiedStatistics = 'Y' AND @StatisticsModificationLevel IS NOT NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'You can only specify one of the parameters @OnlyModifiedStatistics and @StatisticsModificationLevel.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @StatisticsSample <= 0 OR @StatisticsSample  > 100
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @StatisticsSample is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @StatisticsResample NOT IN('Y','N') OR @StatisticsResample IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @StatisticsResample is not supported.', 16, 1
  END

  IF @StatisticsResample = 'Y' AND @StatisticsSample IS NOT NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @StatisticsResample is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @PartitionLevel NOT IN('Y','N') OR @PartitionLevel IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @PartitionLevel is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @MSShippedObjects NOT IN('Y','N') OR @MSShippedObjects IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @MSShippedObjects is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF EXISTS(SELECT * FROM @SelectedIndexes WHERE DatabaseName IS NULL OR SchemaName IS NULL OR ObjectName IS NULL OR IndexName IS NULL)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Indexes is not supported.', 16, 1
  END

  IF @Indexes IS NOT NULL AND NOT EXISTS(SELECT * FROM @SelectedIndexes)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Indexes is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @IndexTypes NOT IN ('ALL', 'CLUSTERED', 'NONCLUSTERED') OR @IndexTypes IS NULL
    BEGIN
      INSERT INTO @Errors ([Message], Severity, [State])
      SELECT 'The value for the parameter @IndexTypes is not supported.', 16, 1
    END

  ----------------------------------------------------------------------------------------------------

  IF @TimeLimit < 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @TimeLimit is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @Delay < 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Delay is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @WaitAtLowPriorityMaxDuration < 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @WaitAtLowPriorityMaxDuration is not supported.', 16, 1
  END

  IF @WaitAtLowPriorityMaxDuration IS NOT NULL AND @Version < 12
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @WaitAtLowPriorityMaxDuration is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @WaitAtLowPriorityAbortAfterWait NOT IN('NONE','SELF','BLOCKERS')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @WaitAtLowPriorityAbortAfterWait is not supported.', 16, 1
  END

  IF @WaitAtLowPriorityAbortAfterWait IS NOT NULL AND @Version < 12
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @WaitAtLowPriorityAbortAfterWait is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF (@WaitAtLowPriorityAbortAfterWait IS NOT NULL AND @WaitAtLowPriorityMaxDuration IS NULL) OR (@WaitAtLowPriorityAbortAfterWait IS NULL AND @WaitAtLowPriorityMaxDuration IS NOT NULL)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The parameters @WaitAtLowPriorityMaxDuration and @WaitAtLowPriorityAbortAfterWait can only be used together.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @Resumable NOT IN('Y','N') OR @Resumable IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Resumable is not supported.', 16, 1
  END

  IF @Resumable = 'Y' AND NOT (@Version >= 14 OR SERVERPROPERTY('EngineEdition') IN (5, 8))
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Resumable is not supported.', 16, 2
  END

  IF @Resumable = 'Y' AND @SortInTempdb = 'Y'
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'You can only specify one of the parameters @Resumable and @SortInTempdb.', 16, 3
  END

  ----------------------------------------------------------------------------------------------------

  IF @LockTimeout < 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @LockTimeout is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @LockMessageSeverity NOT IN(10, 16)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @LockMessageSeverity is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @StringDelimiter IS NULL OR LEN(@StringDelimiter) > 1
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @StringDelimiter is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @DatabaseOrder NOT IN('DATABASE_NAME_ASC','DATABASE_NAME_DESC','DATABASE_SIZE_ASC','DATABASE_SIZE_DESC')
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @DatabaseOrder is not supported.', 16, 1
  END

  IF @DatabaseOrder IS NOT NULL AND SERVERPROPERTY('EngineEdition') = 5
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @DatabaseOrder is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF @DatabasesInParallel NOT IN('Y','N') OR @DatabasesInParallel IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @DatabasesInParallel is not supported.', 16, 1
  END

  IF @DatabasesInParallel = 'Y' AND SERVERPROPERTY('EngineEdition') = 5
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @DatabasesInParallel is not supported.', 16, 2
  END

  ----------------------------------------------------------------------------------------------------

  IF LEN(@ExecuteAsUser) > 128
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @ExecuteAsUser is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @LogToTable NOT IN('Y','N') OR @LogToTable IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @LogToTable is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF @Execute NOT IN('Y','N') OR @Execute IS NULL
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The value for the parameter @Execute is not supported.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------

  IF EXISTS(SELECT * FROM @Errors)
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The documentation is available at https://ola.hallengren.com/sql-server-index-and-statistics-maintenance.html.', 16, 1
  END

  ----------------------------------------------------------------------------------------------------
  --// Check that selected databases and availability groups exist                                //--
  ----------------------------------------------------------------------------------------------------

  SET @ErrorMessage = ''
  SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(DatabaseName) + ', '
  FROM @SelectedDatabases
  WHERE DatabaseName NOT LIKE '%[%]%'
  AND DatabaseName NOT IN (SELECT DatabaseName FROM @tmpDatabases)
  IF @@ROWCOUNT > 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The following databases in the @Databases parameter do not exist: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.', 10, 1
  END

  SET @ErrorMessage = ''
  SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(DatabaseName) + ', '
  FROM @SelectedIndexes
  WHERE DatabaseName NOT LIKE '%[%]%'
  AND DatabaseName NOT IN (SELECT DatabaseName FROM @tmpDatabases)
  IF @@ROWCOUNT > 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The following databases in the @Indexes parameter do not exist: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.', 10, 1
  END

  SET @ErrorMessage = ''
  SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(AvailabilityGroupName) + ', '
  FROM @SelectedAvailabilityGroups
  WHERE AvailabilityGroupName NOT LIKE '%[%]%'
  AND AvailabilityGroupName NOT IN (SELECT AvailabilityGroupName FROM @tmpAvailabilityGroups)
  IF @@ROWCOUNT > 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The following availability groups do not exist: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.', 10, 1
  END

  SET @ErrorMessage = ''
  SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(DatabaseName) + ', '
  FROM @SelectedIndexes
  WHERE DatabaseName NOT LIKE '%[%]%'
  AND DatabaseName IN (SELECT DatabaseName FROM @tmpDatabases)
  AND DatabaseName NOT IN (SELECT DatabaseName FROM @tmpDatabases WHERE Selected = 1)
  IF @@ROWCOUNT > 0
  BEGIN
    INSERT INTO @Errors ([Message], Severity, [State])
    SELECT 'The following databases have been selected in the @Indexes parameter, but not in the @Databases or @AvailabilityGroups parameters: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.', 10, 1
  END

  ----------------------------------------------------------------------------------------------------
  --// Raise errors                                                                               //--
  ----------------------------------------------------------------------------------------------------

  DECLARE ErrorCursor CURSOR FAST_FORWARD FOR SELECT [Message], Severity, [State] FROM @Errors ORDER BY [ID] ASC

  OPEN ErrorCursor

  FETCH ErrorCursor INTO @CurrentMessage, @CurrentSeverity, @CurrentState

  WHILE @@FETCH_STATUS = 0
  BEGIN
    RAISERROR('%s', @CurrentSeverity, @CurrentState, @CurrentMessage) WITH NOWAIT
    RAISERROR(@EmptyLine, 10, 1) WITH NOWAIT

    FETCH NEXT FROM ErrorCursor INTO @CurrentMessage, @CurrentSeverity, @CurrentState
  END

  CLOSE ErrorCursor

  DEALLOCATE ErrorCursor

  IF EXISTS (SELECT * FROM @Errors WHERE Severity >= 16)
  BEGIN
    SET @ReturnCode = 50000
    GOTO Logging
  END

  ----------------------------------------------------------------------------------------------------
  --// Should statistics be updated on the partition level?                                       //--
  ----------------------------------------------------------------------------------------------------

  SET @PartitionLevelStatistics = CASE WHEN @PartitionLevel = 'Y' AND ((@Version >= 12.05 AND @Version < 13) OR @Version >= 13.04422 OR SERVERPROPERTY('EngineEdition') IN (5,8)) THEN 1 ELSE 0 END

  ----------------------------------------------------------------------------------------------------
  --// Update database order                                                                      //--
  ----------------------------------------------------------------------------------------------------

  IF @DatabaseOrder IN('DATABASE_SIZE_ASC','DATABASE_SIZE_DESC')
  BEGIN
    UPDATE tmpDatabases
    SET DatabaseSize = (SELECT SUM(CAST(size AS bigint)) FROM sys.master_files WHERE [type] = 0 AND database_id = DB_ID(tmpDatabases.DatabaseName))
    FROM @tmpDatabases tmpDatabases
  END

  IF @DatabaseOrder IS NULL
  BEGIN
    WITH tmpDatabases AS (
    SELECT DatabaseName, [Order], ROW_NUMBER() OVER (ORDER BY StartPosition ASC, DatabaseName ASC) AS RowNumber
    FROM @tmpDatabases tmpDatabases
    WHERE Selected = 1
    )
    UPDATE tmpDatabases
    SET [Order] = RowNumber
  END
  ELSE
  IF @DatabaseOrder = 'DATABASE_NAME_ASC'
  BEGIN
    WITH tmpDatabases AS (
    SELECT DatabaseName, [Order], ROW_NUMBER() OVER (ORDER BY DatabaseName ASC) AS RowNumber
    FROM @tmpDatabases tmpDatabases
    WHERE Selected = 1
    )
    UPDATE tmpDatabases
    SET [Order] = RowNumber
  END
  ELSE
  IF @DatabaseOrder = 'DATABASE_NAME_DESC'
  BEGIN
    WITH tmpDatabases AS (
    SELECT DatabaseName, [Order], ROW_NUMBER() OVER (ORDER BY DatabaseName DESC) AS RowNumber
    FROM @tmpDatabases tmpDatabases
    WHERE Selected = 1
    )
    UPDATE tmpDatabases
    SET [Order] = RowNumber
  END
  ELSE
  IF @DatabaseOrder = 'DATABASE_SIZE_ASC'
  BEGIN
    WITH tmpDatabases AS (
    SELECT DatabaseName, [Order], ROW_NUMBER() OVER (ORDER BY DatabaseSize ASC) AS RowNumber
    FROM @tmpDatabases tmpDatabases
    WHERE Selected = 1
    )
    UPDATE tmpDatabases
    SET [Order] = RowNumber
  END
  ELSE
  IF @DatabaseOrder = 'DATABASE_SIZE_DESC'
  BEGIN
    WITH tmpDatabases AS (
    SELECT DatabaseName, [Order], ROW_NUMBER() OVER (ORDER BY DatabaseSize DESC) AS RowNumber
    FROM @tmpDatabases tmpDatabases
    WHERE Selected = 1
    )
    UPDATE tmpDatabases
    SET [Order] = RowNumber
  END

  ----------------------------------------------------------------------------------------------------
  --// Update the queue                                                                           //--
  ----------------------------------------------------------------------------------------------------

  IF @DatabasesInParallel = 'Y'
  BEGIN

    BEGIN TRY

      SELECT @QueueID = QueueID
      FROM dbo.[Queue]
      WHERE SchemaName = @SchemaName
      AND ObjectName = @ObjectName
      AND [Parameters] = @Parameters

      IF @QueueID IS NULL
      BEGIN
        BEGIN TRANSACTION

        SELECT @QueueID = QueueID
        FROM dbo.[Queue] WITH (UPDLOCK, HOLDLOCK)
        WHERE SchemaName = @SchemaName
        AND ObjectName = @ObjectName
        AND [Parameters] = @Parameters

        IF @QueueID IS NULL
        BEGIN
          INSERT INTO dbo.[Queue] (SchemaName, ObjectName, [Parameters])
          SELECT @SchemaName, @ObjectName, @Parameters

          SET @QueueID = SCOPE_IDENTITY()
        END

        COMMIT TRANSACTION
      END

      BEGIN TRANSACTION

      UPDATE [Queue]
      SET QueueStartTime = SYSDATETIME(),
          SessionID = @@SPID,
          RequestID = (SELECT request_id FROM sys.dm_exec_requests WHERE session_id = @@SPID),
          RequestStartTime = (SELECT start_time FROM sys.dm_exec_requests WHERE session_id = @@SPID)
      FROM dbo.[Queue] [Queue]
      WHERE QueueID = @QueueID
      AND NOT EXISTS (SELECT *
                      FROM sys.dm_exec_requests
                      WHERE session_id = [Queue].SessionID
                      AND request_id = [Queue].RequestID
                      AND start_time = [Queue].RequestStartTime)
      AND NOT EXISTS (SELECT *
                      FROM dbo.QueueDatabase QueueDatabase
                      INNER JOIN sys.dm_exec_requests ON QueueDatabase.SessionID = session_id AND QueueDatabase.RequestID = request_id AND QueueDatabase.RequestStartTime = start_time
                      WHERE QueueDatabase.QueueID = @QueueID)

      IF @@ROWCOUNT = 1
      BEGIN
        INSERT INTO dbo.QueueDatabase (QueueID, DatabaseName)
        SELECT @QueueID AS QueueID,
               DatabaseName
        FROM @tmpDatabases tmpDatabases
        WHERE Selected = 1
        AND NOT EXISTS (SELECT * FROM dbo.QueueDatabase WHERE DatabaseName = tmpDatabases.DatabaseName AND QueueID = @QueueID)

        DELETE QueueDatabase
        FROM dbo.QueueDatabase QueueDatabase
        WHERE QueueID = @QueueID
        AND NOT EXISTS (SELECT * FROM @tmpDatabases tmpDatabases WHERE DatabaseName = QueueDatabase.DatabaseName AND Selected = 1)

        UPDATE QueueDatabase
        SET DatabaseOrder = tmpDatabases.[Order]
        FROM dbo.QueueDatabase QueueDatabase
        INNER JOIN @tmpDatabases tmpDatabases ON QueueDatabase.DatabaseName = tmpDatabases.DatabaseName
        WHERE QueueID = @QueueID
      END

      COMMIT TRANSACTION

      SELECT @QueueStartTime = QueueStartTime
      FROM dbo.[Queue]
      WHERE QueueID = @QueueID

    END TRY

    BEGIN CATCH
      IF XACT_STATE() <> 0
      BEGIN
        ROLLBACK TRANSACTION
      END
      SET @ErrorMessage = 'Msg ' + CAST(ERROR_NUMBER() AS nvarchar) + ', ' + ISNULL(ERROR_MESSAGE(),'')
      RAISERROR('%s',16,1,@ErrorMessage) WITH NOWAIT
      RAISERROR(@EmptyLine,10,1) WITH NOWAIT
      SET @ReturnCode = ERROR_NUMBER()
      GOTO Logging
    END CATCH

  END

  ----------------------------------------------------------------------------------------------------
  --// Execute commands                                                                           //--
  ----------------------------------------------------------------------------------------------------

  WHILE (1 = 1)
  BEGIN

    IF @DatabasesInParallel = 'Y'
    BEGIN
      UPDATE QueueDatabase
      SET DatabaseStartTime = NULL,
          SessionID = NULL,
          RequestID = NULL,
          RequestStartTime = NULL
      FROM dbo.QueueDatabase QueueDatabase
      WHERE QueueID = @QueueID
      AND DatabaseStartTime IS NOT NULL
      AND DatabaseEndTime IS NULL
      AND NOT EXISTS (SELECT * FROM sys.dm_exec_requests WHERE session_id = QueueDatabase.SessionID AND request_id = QueueDatabase.RequestID AND start_time = QueueDatabase.RequestStartTime)

      UPDATE QueueDatabase
      SET DatabaseStartTime = SYSDATETIME(),
          DatabaseEndTime = NULL,
          SessionID = @@SPID,
          RequestID = (SELECT request_id FROM sys.dm_exec_requests WHERE session_id = @@SPID),
          RequestStartTime = (SELECT start_time FROM sys.dm_exec_requests WHERE session_id = @@SPID),
          @CurrentDatabaseName = DatabaseName
      FROM (SELECT TOP 1 DatabaseStartTime,
                         DatabaseEndTime,
                         SessionID,
                         RequestID,
                         RequestStartTime,
                         DatabaseName
            FROM dbo.QueueDatabase
            WHERE QueueID = @QueueID
            AND (DatabaseStartTime < @QueueStartTime OR DatabaseStartTime IS NULL)
            AND NOT (DatabaseStartTime IS NOT NULL AND DatabaseEndTime IS NULL)
            ORDER BY DatabaseOrder ASC
            ) QueueDatabase
    END
    ELSE
    BEGIN
      SELECT TOP 1 @CurrentDBID = ID,
                   @CurrentDatabaseName = DatabaseName
      FROM @tmpDatabases
      WHERE Selected = 1
      AND Completed = 0
      ORDER BY [Order] ASC
    END

    IF @@ROWCOUNT = 0
    BEGIN
      BREAK
    END

    SET @CurrentDatabase_sp_executesql = QUOTENAME(@CurrentDatabaseName) + '.sys.sp_executesql'

    BEGIN
      SET @DatabaseMessage = 'Date and time: ' + CONVERT(nvarchar,SYSDATETIME(),120)
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'Database: ' + QUOTENAME(@CurrentDatabaseName)
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT
    END

    SELECT @CurrentUserAccess = user_access_desc,
           @CurrentIsReadOnly = is_read_only,
           @CurrentDatabaseState = state_desc,
           @CurrentInStandby = is_in_standby,
           @CurrentRecoveryModel = recovery_model_desc
    FROM sys.databases
    WHERE [name] = @CurrentDatabaseName

    BEGIN
      SET @DatabaseMessage = 'State: ' + @CurrentDatabaseState
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'Standby: ' + CASE WHEN @CurrentInStandby = 1 THEN 'Yes' ELSE 'No' END
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'Updateability: ' + CASE WHEN @CurrentIsReadOnly = 1 THEN 'READ_ONLY' WHEN  @CurrentIsReadOnly = 0 THEN 'READ_WRITE' END
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'User access: ' + @CurrentUserAccess
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'Recovery model: ' + @CurrentRecoveryModel
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT
    END

    IF @Version >= 11 AND SERVERPROPERTY('IsHadrEnabled') = 1
    BEGIN
      SELECT @CurrentReplicaID = databases.replica_id
      FROM sys.databases databases
      INNER JOIN sys.availability_replicas availability_replicas ON databases.replica_id = availability_replicas.replica_id
      WHERE databases.[name] = @CurrentDatabaseName

      SELECT @CurrentAvailabilityGroupID = group_id
      FROM sys.availability_replicas
      WHERE replica_id = @CurrentReplicaID

      SELECT @CurrentAvailabilityGroupRole = role_desc
      FROM sys.dm_hadr_availability_replica_states
      WHERE replica_id = @CurrentReplicaID

      SELECT @CurrentAvailabilityGroup = [name]
      FROM sys.availability_groups
      WHERE group_id = @CurrentAvailabilityGroupID
    END

    IF SERVERPROPERTY('EngineEdition') <> 5
    BEGIN
      SELECT @CurrentDatabaseMirroringRole = UPPER(mirroring_role_desc)
      FROM sys.database_mirroring database_mirroring
      INNER JOIN sys.databases databases ON database_mirroring.database_id = databases.database_id
      WHERE databases.[name] = @CurrentDatabaseName
    END

    IF @CurrentAvailabilityGroup IS NOT NULL
    BEGIN
      SET @DatabaseMessage = 'Availability group: ' + ISNULL(@CurrentAvailabilityGroup,'N/A')
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT

      SET @DatabaseMessage = 'Availability group role: ' + ISNULL(@CurrentAvailabilityGroupRole,'N/A')
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT
    END

    IF @CurrentDatabaseMirroringRole IS NOT NULL
    BEGIN
      SET @DatabaseMessage = 'Database mirroring role: ' + @CurrentDatabaseMirroringRole
      RAISERROR('%s',10,1,@DatabaseMessage) WITH NOWAIT
    END

    RAISERROR(@EmptyLine,10,1) WITH NOWAIT

    IF @ExecuteAsUser IS NOT NULL
    AND @CurrentDatabaseState = 'ONLINE'
    AND NOT (@CurrentUserAccess = 'SINGLE_USER')
    AND NOT (@CurrentAvailabilityGroup IS NOT NULL AND (@CurrentAvailabilityGroupRole <> 'PRIMARY' OR @CurrentAvailabilityGroupRole IS NULL))
    AND NOT (@AmazonRDS = 1 AND @CurrentDatabaseName = 'rdsadmin')
    BEGIN
      SET @CurrentCommand = ''
      SET @CurrentCommand += 'IF EXISTS(SELECT * FROM sys.database_principals database_principals WHERE database_principals.[name] = @ParamExecuteAsUser) BEGIN SET @ParamExecuteAsUserExists = 1 END ELSE BEGIN SET @ParamExecuteAsUserExists = 0 END'

      EXECUTE @CurrentDatabase_sp_executesql @stmt = @CurrentCommand, @params = N'@ParamExecuteAsUser sysname, @ParamExecuteAsUserExists bit OUTPUT', @ParamExecuteAsUser = @ExecuteAsUser, @ParamExecuteAsUserExists = @CurrentExecuteAsUserExists OUTPUT
    END

    IF @CurrentExecuteAsUserExists = 0
    BEGIN
      SET @DatabaseMessage = 'The user ' + QUOTENAME(@ExecuteAsUser) + ' does not exist in the database ' + QUOTENAME(@CurrentDatabaseName) + '.'
      RAISERROR('%s',16,1,@DatabaseMessage) WITH NOWAIT
      RAISERROR(@EmptyLine,10,1) WITH NOWAIT
    END

    IF @CurrentDatabaseState = 'ONLINE'
    AND NOT (@CurrentUserAccess = 'SINGLE_USER')
    AND NOT (@CurrentAvailabilityGroup IS NOT NULL AND (@CurrentAvailabilityGroupRole <> 'PRIMARY' OR @CurrentAvailabilityGroupRole IS NULL))
    AND NOT (@AmazonRDS = 1 AND @CurrentDatabaseName = 'rdsadmin')
    AND NOT (@CurrentIsReadOnly = 1)
    AND (@CurrentExecuteAsUserExists = 1 OR @CurrentExecuteAsUserExists IS NULL)
    BEGIN

      -- Select indexes in the current database
      IF (EXISTS(SELECT * FROM @ActionsPreferred) OR @UpdateStatistics IS NOT NULL) AND (SYSDATETIME() < DATEADD(SECOND,@TimeLimit,@StartTime) OR @TimeLimit IS NULL)
      BEGIN
        SET @CurrentCommand = 'SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;'
                              + ' SELECT SchemaID, SchemaName, ObjectID, ObjectName, ObjectType, IsMemoryOptimized, IndexID, IndexName, IndexType, AllowPageLocks, HasFilter, IsImageText, IsNewLOB, IsFileStream, HasClusteredColumnstore, HasNonClusteredColumnstore, IsComputed, IsClusteredIndexComputed, IsTimestamp, OnReadOnlyFileGroup, ResumableIndexOperation, StatisticsID, StatisticsName, NoRecompute, IsIncremental, PartitionID, PartitionNumber, PartitionCount, [Order], Selected, Completed'
                              + ' FROM ('

        IF EXISTS(SELECT * FROM @ActionsPreferred) OR @UpdateStatistics IN('ALL','INDEX')
        BEGIN
          SET @CurrentCommand = @CurrentCommand + 'SELECT schemas.[schema_id] AS SchemaID'
                                                    + ', schemas.[name] AS SchemaName'
                                                    + ', objects.[object_id] AS ObjectID'
                                                    + ', objects.[name] AS ObjectName'
                                                    + ', RTRIM(objects.[type]) AS ObjectType'
                                                    + ', ' + CASE WHEN @Version >= 12 THEN 'tables.is_memory_optimized' ELSE '0' END + ' AS IsMemoryOptimized'
                                                    + ', indexes.index_id AS IndexID'
                                                    + ', indexes.[name] AS IndexName'
                                                    + ', indexes.[type] AS IndexType'
                                                    + ', indexes.allow_page_locks AS AllowPageLocks'
                                                    + ', indexes.has_filter AS HasFilter'

                                                    + ', CASE WHEN indexes.[type] = 1 AND EXISTS(SELECT * FROM sys.columns columns INNER JOIN sys.types types ON columns.system_type_id = types.user_type_id WHERE columns.[object_id] = objects.object_id AND types.name IN(''image'',''text'',''ntext'')) THEN 1 ELSE 0 END AS IsImageText'

                                                    + ', CASE WHEN indexes.[type] = 1 AND EXISTS(SELECT * FROM sys.columns columns INNER JOIN sys.types types ON columns.system_type_id = types.user_type_id OR (columns.user_type_id = types.user_type_id AND types.is_assembly_type = 1) WHERE columns.[object_id] = objects.object_id AND (types.name IN(''xml'') OR (types.name IN(''varchar'',''nvarchar'',''varbinary'') AND columns.max_length = -1) OR (types.is_assembly_type = 1 AND columns.max_length = -1))) THEN 1'
                                                    + ' WHEN indexes.[type] = 2 AND EXISTS(SELECT * FROM sys.index_columns index_columns INNER JOIN sys.columns columns ON index_columns.[object_id] = columns.[object_id] AND index_columns.column_id = columns.column_id INNER JOIN sys.types types ON columns.system_type_id = types.user_type_id OR (columns.user_type_id = types.user_type_id AND types.is_assembly_type = 1) WHERE index_columns.[object_id] = objects.object_id AND index_columns.index_id = indexes.index_id AND (types.[name] IN(''xml'') OR (types.[name] IN(''varchar'',''nvarchar'',''varbinary'') AND columns.max_length = -1) OR (types.is_assembly_type = 1 AND columns.max_length = -1))) THEN 1 ELSE 0 END AS IsNewLOB'

                                                    + ', CASE WHEN indexes.[type] = 1 AND EXISTS(SELECT * FROM sys.columns columns WHERE columns.[object_id] = objects.object_id  AND columns.is_filestream = 1) THEN 1 ELSE 0 END AS IsFileStream'

                                                    + ', CASE WHEN EXISTS(SELECT * FROM sys.indexes indexes WHERE indexes.[object_id] = objects.object_id AND [type] = 5) THEN 1 ELSE 0 END AS HasClusteredColumnstore'

                                                    + ', CASE WHEN EXISTS(SELECT * FROM sys.indexes indexes WHERE indexes.[object_id] = objects.object_id AND [type] = 6) THEN 1 ELSE 0 END AS HasNonClusteredColumnstore'

                                                    + ', CASE WHEN EXISTS(SELECT * FROM sys.index_columns index_columns INNER JOIN sys.columns columns ON index_columns.object_id = columns.object_id AND index_columns.column_id = columns.column_id WHERE (index_columns.key_ordinal > 0 OR index_columns.partition_ordinal > 0) AND columns.is_computed = 1 AND index_columns.object_id = indexes.object_id AND index_columns.index_id = indexes.index_id) THEN 1 ELSE 0 END AS IsComputed'

                                                    + ', CASE WHEN EXISTS(SELECT * FROM sys.index_columns index_columns INNER JOIN sys.columns columns ON index_columns.object_id = columns.object_id AND index_columns.column_id = columns.column_id INNER JOIN sys.indexes indexes2 ON index_columns.object_id = indexes2.object_id AND index_columns.index_id = indexes2.index_id WHERE (index_columns.key_ordinal > 0 OR index_columns.partition_ordinal > 0) AND columns.is_computed = 1 AND indexes2.[type] = 1 AND index_columns.object_id = indexes.object_id) THEN 1 ELSE 0 END AS IsClusteredIndexComputed'

                                                    + ', CASE WHEN EXISTS(SELECT * FROM sys.index_columns index_columns INNER JOIN sys.columns columns ON index_columns.[object_id] = columns.[object_id] AND index_columns.column_id = columns.column_id INNER JOIN sys.types types ON columns.system_type_id = types.system_type_id WHERE index_columns.[object_id] = objects.object_id AND index_columns.index_id = indexes.index_id AND types.[name] = ''timestamp'') THEN 1 ELSE 0 END AS IsTimestamp'

                                                    + ', CASE WHEN EXISTS (SELECT * FROM sys.indexes indexes2 INNER JOIN sys.destination_data_spaces destination_data_spaces ON indexes.data_space_id = destination_data_spaces.partition_scheme_id INNER JOIN sys.filegroups filegroups ON destination_data_spaces.data_space_id = filegroups.data_space_id WHERE filegroups.is_read_only = 1 AND indexes2.[object_id] = indexes.[object_id] AND indexes2.[index_id] = indexes.index_id' + CASE WHEN @PartitionLevel = 'Y' THEN ' AND destination_data_spaces.destination_id = partitions.partition_number' ELSE '' END + ') THEN 1'
                                                    + ' WHEN EXISTS (SELECT * FROM sys.indexes indexes2 INNER JOIN sys.filegroups filegroups ON indexes.data_space_id = filegroups.data_space_id WHERE filegroups.is_read_only = 1 AND indexes.[object_id] = indexes2.[object_id] AND indexes.[index_id] = indexes2.index_id) THEN 1'
                                                    + ' WHEN indexes.[type] = 1 AND EXISTS (SELECT * FROM sys.tables tables INNER JOIN sys.filegroups filegroups ON tables.lob_data_space_id = filegroups.data_space_id WHERE filegroups.is_read_only = 1 AND tables.[object_id] = objects.[object_id]) THEN 1 ELSE 0 END AS OnReadOnlyFileGroup'

                                                    + ', ' + CASE WHEN @Version >= 14 OR SERVERPROPERTY('EngineEdition') IN (5, 8) THEN 'CASE WHEN EXISTS(SELECT * FROM sys.index_resumable_operations index_resumable_operations WHERE state_desc = ''PAUSED'' AND index_resumable_operations.object_id = indexes.object_id AND index_resumable_operations.index_id = indexes.index_id' + CASE WHEN @PartitionLevel = 'Y' THEN ' AND (index_resumable_operations.partition_number = partitions.partition_number OR index_resumable_operations.partition_number IS NULL)' ELSE '' END + ') THEN 1 ELSE 0 END' ELSE '0' END + ' AS ResumableIndexOperation'

                                                    + ', stats.stats_id AS StatisticsID'
                                                    + ', stats.name AS StatisticsName'
                                                    + ', stats.no_recompute AS NoRecompute'
                                                    + ', ' + CASE WHEN @Version >= 12 THEN 'stats.is_incremental' ELSE '0' END + ' AS IsIncremental'
                                                    + ', ' + CASE WHEN @PartitionLevel = 'Y' THEN 'partitions.partition_id AS PartitionID' WHEN @PartitionLevel = 'N' THEN 'NULL AS PartitionID' END
                                                    + ', ' + CASE WHEN @PartitionLevel = 'Y' THEN 'partitions.partition_number AS PartitionNumber' WHEN @PartitionLevel = 'N' THEN 'NULL AS PartitionNumber' END
                                                    + ', ' + CASE WHEN @PartitionLevel = 'Y' THEN 'IndexPartitions.partition_count AS PartitionCount' WHEN @PartitionLevel = 'N' THEN 'NULL AS PartitionCount' END
                                                    + ', 0 AS [Order]'
                                                    + ', 0 AS Selected'
                                                    + ', 0 AS Completed'
                                                    + ' FROM sys.indexes indexes'
                                                    + ' INNER JOIN sys.objects objects ON indexes.[object_id] = objects.[object_id]'
                                                    + ' INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id]'
                                                    + ' LEFT OUTER JOIN sys.tables tables ON objects.[object_id] = tables.[object_id]'
                                                    + ' LEFT OUTER JOIN sys.stats stats ON indexes.[object_id] = stats.[object_id] AND indexes.[index_id] = stats.[stats_id]'
          IF @PartitionLevel = 'Y'
          BEGIN
            SET @CurrentCommand = @CurrentCommand + ' LEFT OUTER JOIN sys.partitions partitions ON indexes.[object_id] = partitions.[object_id] AND indexes.index_id = partitions.index_id'
                                                      + ' LEFT OUTER JOIN (SELECT partitions.[object_id], partitions.index_id, COUNT(DISTINCT partitions.partition_number) AS partition_count FROM sys.partitions partitions GROUP BY partitions.[object_id], partitions.index_id) IndexPartitions ON partitions.[object_id] = IndexPartitions.[object_id] AND partitions.[index_id] = IndexPartitions.[index_id]'
          END

          SET @CurrentCommand = @CurrentCommand + ' WHERE objects.[type] IN(''U'',''V'')'
                                                    + CASE WHEN @MSShippedObjects = 'N' THEN ' AND objects.is_ms_shipped = 0' ELSE '' END
                                                    + ' AND indexes.[type] IN(' + CASE
                                                            WHEN @IndexTypes = 'CLUSTERED'    THEN '1,5'
                                                            WHEN @IndexTypes = 'NONCLUSTERED' THEN '2,3,4,6,7'
                                                            ELSE '1,2,3,4,5,6,7'
                                                          END + ')'
                                                    + ' AND indexes.is_disabled = 0 AND indexes.is_hypothetical = 0'
        END

        IF (EXISTS(SELECT * FROM @ActionsPreferred) AND @UpdateStatistics = 'COLUMNS') OR @UpdateStatistics = 'ALL'
        BEGIN
          SET @CurrentCommand = @CurrentCommand + ' UNION '
        END

        IF @UpdateStatistics IN('ALL','COLUMNS')
        BEGIN
          SET @CurrentCommand = @CurrentCommand + 'SELECT schemas.[schema_id] AS SchemaID'
                                                    + ', schemas.[name] AS SchemaName'
                                                    + ', objects.[object_id] AS ObjectID'
                                                    + ', objects.[name] AS ObjectName'
                                                    + ', RTRIM(objects.[type]) AS ObjectType'
                                                    + ', ' + CASE WHEN @Version >= 12 THEN 'tables.is_memory_optimized' ELSE '0' END + ' AS IsMemoryOptimized'
                                                    + ', NULL AS IndexID, NULL AS IndexName'
                                                    + ', NULL AS IndexType'
                                                    + ', NULL AS AllowPageLocks'
                                                    + ', NULL AS HasFilter'
                                                    + ', NULL AS IsImageText'
                                                    + ', NULL AS IsNewLOB'
                                                    + ', NULL AS IsFileStream'
                                                    + ', NULL AS HasClusteredColumnstore'
                                                    + ', NULL AS HasNonClusteredColumnstore'
                                                    + ', NULL AS IsComputed'
                                                    + ', NULL AS IsClusteredIndexComputed'
                                                    + ', NULL AS IsTimestamp'
                                                    + ', NULL AS OnReadOnlyFileGroup'
                                                    + ', NULL AS ResumableIndexOperation'
                                                    + ', stats.stats_id AS StatisticsID'
                                                    + ', stats.name AS StatisticsName'
                                                    + ', stats.no_recompute AS NoRecompute'
                                                    + ', ' + CASE WHEN @Version >= 12 THEN 'stats.is_incremental' ELSE '0' END + ' AS IsIncremental'
                                                    + ', NULL AS PartitionID'
                                                    + ', ' + CASE WHEN @PartitionLevelStatistics = 1 THEN 'dm_db_incremental_stats_properties.partition_number' ELSE 'NULL' END + ' AS PartitionNumber'
                                                    + ', NULL AS PartitionCount'
                                                    + ', 0 AS [Order]'
                                                    + ', 0 AS Selected'
                                                    + ', 0 AS Completed'
                                                    + ' FROM sys.stats stats'
                                                    + ' INNER JOIN sys.objects objects ON stats.[object_id] = objects.[object_id]'
                                                    + ' INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id]'
                                                    + ' LEFT OUTER JOIN sys.tables tables ON objects.[object_id] = tables.[object_id]'

          IF @PartitionLevelStatistics = 1
          BEGIN
            SET @CurrentCommand = @CurrentCommand + ' OUTER APPLY sys.dm_db_incremental_stats_properties(stats.object_id, stats.stats_id) dm_db_incremental_stats_properties'
          END

          SET @CurrentCommand = @CurrentCommand + ' WHERE objects.[type] IN(''U'',''V'')'
                                                    + CASE WHEN @Version >= 12 THEN ' AND (tables.is_memory_optimized = 0 OR tables.is_memory_optimized IS NULL)' ELSE '' END
                                                    + CASE WHEN @MSShippedObjects = 'N' THEN ' AND objects.is_ms_shipped = 0' ELSE '' END
                                                    + ' AND NOT EXISTS(SELECT * FROM sys.indexes indexes WHERE indexes.[object_id] = stats.[object_id] AND indexes.index_id = stats.stats_id)'
                                                    + ' AND NOT EXISTS(SELECT * FROM sys.indexes indexes2 WHERE indexes2.[object_id] = stats.[object_id] AND indexes2.type = 1 AND indexes2.is_disabled = 1)'

          IF @Version >= 12
          BEGIN
            SET @CurrentCommand = @CurrentCommand + ' UNION '

            SET @CurrentCommand = @CurrentCommand + 'SELECT schemas.[schema_id] AS SchemaID'
                                                      + ', schemas.[name] AS SchemaName'
                                                      + ', objects.[object_id] AS ObjectID'
                                                      + ', objects.[name] AS ObjectName'
                                                      + ', RTRIM(objects.[type]) AS ObjectType'
                                                      + ', tables.is_memory_optimized AS IsMemoryOptimized'
                                                      + ', NULL AS IndexID, NULL AS IndexName'
                                                      + ', NULL AS IndexType'
                                                      + ', NULL AS AllowPageLocks'
                                                      + ', NULL AS HasFilter'
                                                      + ', NULL AS IsImageText'
                                                      + ', NULL AS IsNewLOB'
                                                      + ', NULL AS IsFileStream'
                                                      + ', NULL AS HasClusteredColumnstore'
                                                      + ', NULL AS HasNonClusteredColumnstore'
                                                      + ', NULL AS IsComputed'
                                                      + ', NULL AS IsClusteredIndexComputed'
                                                      + ', NULL AS IsTimestamp'
                                                      + ', NULL AS OnReadOnlyFileGroup'
                                                      + ', NULL AS ResumableIndexOperation'
                                                      + ', stats.stats_id AS StatisticsID'
                                                      + ', stats.name AS StatisticsName'
                                                      + ', stats.no_recompute AS NoRecompute'
                                                      + ', ' + CASE WHEN @Version >= 12 THEN 'stats.is_incremental' ELSE '0' END + ' AS IsIncremental'
                                                      + ', NULL AS PartitionID'
                                                      + ', NULL AS PartitionNumber'
                                                      + ', NULL AS PartitionCount'
                                                      + ', 0 AS [Order]'
                                                      + ', 0 AS Selected'
                                                      + ', 0 AS Completed'
                                                      + ' FROM sys.stats stats'
                                                      + ' INNER JOIN sys.objects objects ON stats.[object_id] = objects.[object_id]'
                                                      + ' INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id]'
                                                      + ' INNER JOIN sys.tables tables ON objects.[object_id] = tables.[object_id]'

            SET @CurrentCommand = @CurrentCommand + ' WHERE objects.[type] = ''U'''
                                                      + ' AND tables.is_memory_optimized = 1'
                                                      + CASE WHEN @MSShippedObjects = 'N' THEN ' AND objects.is_ms_shipped = 0' ELSE '' END
                                                      + ' AND NOT EXISTS(SELECT * FROM sys.indexes indexes WHERE indexes.[object_id] = stats.[object_id] AND indexes.index_id = stats.stats_id)'
          END
        END

        SET @CurrentCommand = @CurrentCommand + ') IndexesStatistics'

        INSERT INTO @tmpIndexesStatistics (SchemaID, SchemaName, ObjectID, ObjectName, ObjectType, IsMemoryOptimized, IndexID, IndexName, IndexType, AllowPageLocks, HasFilter, IsImageText, IsNewLOB, IsFileStream, HasClusteredColumnstore, HasNonClusteredColumnstore, IsComputed, IsClusteredIndexComputed, IsTimestamp, OnReadOnlyFileGroup, ResumableIndexOperation, StatisticsID, StatisticsName, [NoRecompute], IsIncremental, PartitionID, PartitionNumber, PartitionCount, [Order], Selected, Completed)
        EXECUTE @CurrentDatabase_sp_executesql @stmt = @CurrentCommand
        SET @Error = @@ERROR
        IF @Error <> 0
        BEGIN
          SET @ReturnCode = @Error
        END
      END

      IF @Indexes IS NULL
      BEGIN
        UPDATE tmpIndexesStatistics
        SET tmpIndexesStatistics.Selected = 1
        FROM @tmpIndexesStatistics tmpIndexesStatistics
      END
      ELSE
      BEGIN
        UPDATE tmpIndexesStatistics
        SET tmpIndexesStatistics.Selected = SelectedIndexes.Selected
        FROM @tmpIndexesStatistics tmpIndexesStatistics
        INNER JOIN @SelectedIndexes SelectedIndexes
        ON @CurrentDatabaseName LIKE REPLACE(SelectedIndexes.DatabaseName,'_','[_]') AND tmpIndexesStatistics.SchemaName LIKE REPLACE(SelectedIndexes.SchemaName,'_','[_]') AND tmpIndexesStatistics.ObjectName LIKE REPLACE(SelectedIndexes.ObjectName,'_','[_]') AND COALESCE(tmpIndexesStatistics.IndexName,tmpIndexesStatistics.StatisticsName) LIKE REPLACE(SelectedIndexes.IndexName,'_','[_]')
        WHERE SelectedIndexes.Selected = 1

        UPDATE tmpIndexesStatistics
        SET tmpIndexesStatistics.Selected = SelectedIndexes.Selected
        FROM @tmpIndexesStatistics tmpIndexesStatistics
        INNER JOIN @SelectedIndexes SelectedIndexes
        ON @CurrentDatabaseName LIKE REPLACE(SelectedIndexes.DatabaseName,'_','[_]') AND tmpIndexesStatistics.SchemaName LIKE REPLACE(SelectedIndexes.SchemaName,'_','[_]') AND tmpIndexesStatistics.ObjectName LIKE REPLACE(SelectedIndexes.ObjectName,'_','[_]') AND COALESCE(tmpIndexesStatistics.IndexName,tmpIndexesStatistics.StatisticsName) LIKE REPLACE(SelectedIndexes.IndexName,'_','[_]')
        WHERE SelectedIndexes.Selected = 0

        UPDATE tmpIndexesStatistics
        SET tmpIndexesStatistics.StartPosition = SelectedIndexes2.StartPosition
        FROM @tmpIndexesStatistics tmpIndexesStatistics
        INNER JOIN (SELECT tmpIndexesStatistics.SchemaName, tmpIndexesStatistics.ObjectName, tmpIndexesStatistics.IndexName, tmpIndexesStatistics.StatisticsName, MIN(SelectedIndexes.StartPosition) AS StartPosition
                    FROM @tmpIndexesStatistics tmpIndexesStatistics
                    INNER JOIN @SelectedIndexes SelectedIndexes
                    ON @CurrentDatabaseName LIKE REPLACE(SelectedIndexes.DatabaseName,'_','[_]') AND tmpIndexesStatistics.SchemaName LIKE REPLACE(SelectedIndexes.SchemaName,'_','[_]') AND tmpIndexesStatistics.ObjectName LIKE REPLACE(SelectedIndexes.ObjectName,'_','[_]') AND COALESCE(tmpIndexesStatistics.IndexName,tmpIndexesStatistics.StatisticsName) LIKE REPLACE(SelectedIndexes.IndexName,'_','[_]')
                    WHERE SelectedIndexes.Selected = 1
                    GROUP BY tmpIndexesStatistics.SchemaName, tmpIndexesStatistics.ObjectName, tmpIndexesStatistics.IndexName, tmpIndexesStatistics.StatisticsName) SelectedIndexes2
        ON tmpIndexesStatistics.SchemaName = SelectedIndexes2.SchemaName
        AND tmpIndexesStatistics.ObjectName = SelectedIndexes2.ObjectName
        AND (tmpIndexesStatistics.IndexName = SelectedIndexes2.IndexName OR tmpIndexesStatistics.IndexName IS NULL)
        AND (tmpIndexesStatistics.StatisticsName = SelectedIndexes2.StatisticsName OR tmpIndexesStatistics.StatisticsName IS NULL)
      END;

      WITH tmpIndexesStatistics AS (
      SELECT SchemaName, ObjectName, [Order], ROW_NUMBER() OVER (ORDER BY ISNULL(ResumableIndexOperation,0) DESC, StartPosition ASC, SchemaName ASC, ObjectName ASC, CASE WHEN IndexType IS NULL THEN 1 ELSE 0 END ASC, IndexType ASC, IndexName ASC, StatisticsName ASC, PartitionNumber ASC) AS RowNumber
      FROM @tmpIndexesStatistics tmpIndexesStatistics
      WHERE Selected = 1
      )
      UPDATE tmpIndexesStatistics
      SET [Order] = RowNumber

      SET @ErrorMessage = ''
      SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(DatabaseName) + '.' + QUOTENAME(SchemaName) + '.' + QUOTENAME(ObjectName) + ', '
      FROM @SelectedIndexes SelectedIndexes
      WHERE DatabaseName = @CurrentDatabaseName
      AND SchemaName NOT LIKE '%[%]%'
      AND ObjectName NOT LIKE '%[%]%'
      AND IndexName LIKE '%[%]%'
      AND NOT EXISTS (SELECT * FROM @tmpIndexesStatistics WHERE SchemaName = SelectedIndexes.SchemaName AND ObjectName = SelectedIndexes.ObjectName)
      IF @@ROWCOUNT > 0
      BEGIN
        SET @ErrorMessage = 'The following objects in the @Indexes parameter do not exist: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.'
        RAISERROR('%s',10,1,@ErrorMessage) WITH NOWAIT
        SET @Error = @@ERROR
        RAISERROR(@EmptyLine,10,1) WITH NOWAIT
      END

      SET @ErrorMessage = ''
      SELECT @ErrorMessage = @ErrorMessage + QUOTENAME(DatabaseName) + QUOTENAME(SchemaName) + '.' + QUOTENAME(ObjectName) + '.' + QUOTENAME(IndexName) + ', '
      FROM @SelectedIndexes SelectedIndexes
      WHERE DatabaseName = @CurrentDatabaseName
      AND SchemaName NOT LIKE '%[%]%'
      AND ObjectName NOT LIKE '%[%]%'
      AND IndexName NOT LIKE '%[%]%'
      AND NOT EXISTS (SELECT * FROM @tmpIndexesStatistics WHERE SchemaName = SelectedIndexes.SchemaName AND ObjectName = SelectedIndexes.ObjectName AND IndexName = SelectedIndexes.IndexName)
      IF @@ROWCOUNT > 0
      BEGIN
        SET @ErrorMessage = 'The following indexes in the @Indexes parameter do not exist: ' + LEFT(@ErrorMessage,LEN(@ErrorMessage)-1) + '.'
        RAISERROR('%s',10,1,@ErrorMessage) WITH NOWAIT
        SET @Error = @@ERROR
        RAISERROR(@EmptyLine,10,1) WITH NOWAIT
      END

      WHILE (SYSDATETIME() < DATEADD(SECOND,@TimeLimit,@StartTime) OR @TimeLimit IS NULL)
      BEGIN
        SELECT TOP 1 @CurrentIxID = ID,
                     @CurrentIxOrder = [Order],
                     @CurrentSchemaID = SchemaID,
                     @CurrentSchemaName = SchemaName,
                     @CurrentObjectID = ObjectID,
                     @CurrentObjectName = ObjectName,
                     @CurrentObjectType = ObjectType,
                     @CurrentIsMemoryOptimized = IsMemoryOptimized,
                     @CurrentIndexID = IndexID,
                     @CurrentIndexName = IndexName,
                     @CurrentIndexType = IndexType,
                     @CurrentAllowPageLocks = AllowPageLocks,
                     @CurrentHasFilter = HasFilter,
                     @CurrentIsImageText = IsImageText,
                     @CurrentIsNewLOB = IsNewLOB,
                     @CurrentIsFileStream = IsFileStream,
                     @CurrentHasClusteredColumnstore = HasClusteredColumnstore,
                     @CurrentHasNonClusteredColumnstore = HasNonClusteredColumnstore,
                     @CurrentIsComputed = IsComputed,
                     @CurrentIsClusteredIndexComputed = IsClusteredIndexComputed,
                     @CurrentIsTimestamp = IsTimestamp,
                     @CurrentOnReadOnlyFileGroup = OnReadOnlyFileGroup,
                     @CurrentResumableIndexOperation = ResumableIndexOperation,
                     @CurrentStatisticsID = StatisticsID,
                     @CurrentStatisticsName = StatisticsName,
                     @CurrentNoRecompute = [NoRecompute],
                     @CurrentIsIncremental = IsIncremental,
                     @CurrentPartitionID = PartitionID,
                     @CurrentPartitionNumber = PartitionNumber,
                     @CurrentPartitionCount = PartitionCount
        FROM @tmpIndexesStatistics
        WHERE Selected = 1
        AND Completed = 0
        ORDER BY [Order] ASC

        IF @@ROWCOUNT = 0
        BEGIN
          BREAK
        END

        -- Is the index a partition?
        IF @CurrentPartitionNumber IS NULL OR @CurrentPartitionCount = 1 BEGIN SET @CurrentIsPartition = 0 END ELSE BEGIN SET @CurrentIsPartition = 1 END

        -- Does the index exist?
        IF @CurrentIndexID IS NOT NULL AND EXISTS(SELECT * FROM @ActionsPreferred)
        BEGIN
          SET @CurrentCommand = ''

          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '

          IF @CurrentIsPartition = 0 SET @CurrentCommand += 'IF EXISTS(SELECT * FROM sys.indexes indexes INNER JOIN sys.objects objects ON indexes.[object_id] = objects.[object_id] INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] IN(''U'',''V'') AND indexes.[type] IN(1,2,3,4,5,6,7) AND indexes.is_disabled = 0 AND indexes.is_hypothetical = 0 AND schemas.[schema_id] = @ParamSchemaID AND schemas.[name] = @ParamSchemaName AND objects.[object_id] = @ParamObjectID AND objects.[name] = @ParamObjectName AND objects.[type] = @ParamObjectType AND indexes.index_id = @ParamIndexID AND indexes.[name] = @ParamIndexName AND indexes.[type] = @ParamIndexType) BEGIN SET @ParamIndexExists = 1 END'
          IF @CurrentIsPartition = 1 SET @CurrentCommand += 'IF EXISTS(SELECT * FROM sys.indexes indexes INNER JOIN sys.objects objects ON indexes.[object_id] = objects.[object_id] INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] INNER JOIN sys.partitions partitions ON indexes.[object_id] = partitions.[object_id] AND indexes.index_id = partitions.index_id WHERE objects.[type] IN(''U'',''V'') AND indexes.[type] IN(1,2,3,4,5,6,7) AND indexes.is_disabled = 0 AND indexes.is_hypothetical = 0 AND schemas.[schema_id] = @ParamSchemaID AND schemas.[name] = @ParamSchemaName AND objects.[object_id] = @ParamObjectID AND objects.[name] = @ParamObjectName AND objects.[type] = @ParamObjectType AND indexes.index_id = @ParamIndexID AND indexes.[name] = @ParamIndexName AND indexes.[type] = @ParamIndexType AND partitions.partition_id = @ParamPartitionID AND partitions.partition_number = @ParamPartitionNumber) BEGIN SET @ParamIndexExists = 1 END'

          BEGIN TRY
            EXECUTE @CurrentDatabase_sp_executesql @stmt = @CurrentCommand, @params = N'@ParamSchemaID int, @ParamSchemaName sysname, @ParamObjectID int, @ParamObjectName sysname, @ParamObjectType sysname, @ParamIndexID int, @ParamIndexName sysname, @ParamIndexType int, @ParamPartitionID bigint, @ParamPartitionNumber int, @ParamIndexExists bit OUTPUT', @ParamSchemaID = @CurrentSchemaID, @ParamSchemaName = @CurrentSchemaName, @ParamObjectID = @CurrentObjectID, @ParamObjectName = @CurrentObjectName, @ParamObjectType = @CurrentObjectType, @ParamIndexID = @CurrentIndexID, @ParamIndexName = @CurrentIndexName, @ParamIndexType = @CurrentIndexType, @ParamPartitionID = @CurrentPartitionID, @ParamPartitionNumber = @CurrentPartitionNumber, @ParamIndexExists = @CurrentIndexExists OUTPUT

            IF @CurrentIndexExists IS NULL
            BEGIN
              SET @CurrentIndexExists = 0
              GOTO NoAction
            END
          END TRY
          BEGIN CATCH
            SET @ErrorMessage = 'Msg ' + CAST(ERROR_NUMBER() AS nvarchar) + ', ' + ISNULL(ERROR_MESSAGE(),'') + CASE WHEN ERROR_NUMBER() = 1222 THEN ' The index ' + QUOTENAME(@CurrentIndexName) + ' on the object ' + QUOTENAME(@CurrentDatabaseName) + '.' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName) + ' is locked. It could not be checked if the index exists.' ELSE '' END
            SET @Severity = CASE WHEN ERROR_NUMBER() IN(1205,1222) THEN @LockMessageSeverity ELSE 16 END
            RAISERROR('%s',@Severity,1,@ErrorMessage) WITH NOWAIT
            RAISERROR(@EmptyLine,10,1) WITH NOWAIT

            IF NOT (ERROR_NUMBER() IN(1205,1222) AND @LockMessageSeverity = 10)
            BEGIN
              SET @ReturnCode = ERROR_NUMBER()
            END

            GOTO NoAction
          END CATCH
        END

        -- Does the statistics exist?
        IF @CurrentStatisticsID IS NOT NULL AND @UpdateStatistics IS NOT NULL
        BEGIN
          SET @CurrentCommand = ''

          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '

          SET @CurrentCommand += 'IF EXISTS(SELECT * FROM sys.stats stats INNER JOIN sys.objects objects ON stats.[object_id] = objects.[object_id] INNER JOIN sys.schemas schemas ON objects.[schema_id] = schemas.[schema_id] WHERE objects.[type] IN(''U'',''V'')' + CASE WHEN @MSShippedObjects = 'N' THEN ' AND objects.is_ms_shipped = 0' ELSE '' END + ' AND schemas.[schema_id] = @ParamSchemaID AND schemas.[name] = @ParamSchemaName AND objects.[object_id] = @ParamObjectID AND objects.[name] = @ParamObjectName AND objects.[type] = @ParamObjectType AND stats.stats_id = @ParamStatisticsID AND stats.[name] = @ParamStatisticsName) BEGIN SET @ParamStatisticsExists = 1 END'

          BEGIN TRY
            EXECUTE @CurrentDatabase_sp_executesql @stmt = @CurrentCommand, @params = N'@ParamSchemaID int, @ParamSchemaName sysname, @ParamObjectID int, @ParamObjectName sysname, @ParamObjectType sysname, @ParamStatisticsID int, @ParamStatisticsName sysname, @ParamStatisticsExists bit OUTPUT', @ParamSchemaID = @CurrentSchemaID, @ParamSchemaName = @CurrentSchemaName, @ParamObjectID = @CurrentObjectID, @ParamObjectName = @CurrentObjectName, @ParamObjectType = @CurrentObjectType, @ParamStatisticsID = @CurrentStatisticsID, @ParamStatisticsName = @CurrentStatisticsName, @ParamStatisticsExists = @CurrentStatisticsExists OUTPUT

            IF @CurrentStatisticsExists IS NULL
            BEGIN
              SET @CurrentStatisticsExists = 0
              GOTO NoAction
            END
          END TRY
          BEGIN CATCH
            SET @ErrorMessage = 'Msg ' + CAST(ERROR_NUMBER() AS nvarchar) + ', ' + ISNULL(ERROR_MESSAGE(),'') + CASE WHEN ERROR_NUMBER() = 1222 THEN ' The statistics ' + QUOTENAME(@CurrentStatisticsName) + ' on the object ' + QUOTENAME(@CurrentDatabaseName) + '.' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName) + ' is locked. It could not be checked if the statistics exists.' ELSE '' END
            SET @Severity = CASE WHEN ERROR_NUMBER() IN(1205,1222) THEN @LockMessageSeverity ELSE 16 END
            RAISERROR('%s',@Severity,1,@ErrorMessage) WITH NOWAIT
            RAISERROR(@EmptyLine,10,1) WITH NOWAIT

            IF NOT (ERROR_NUMBER() IN(1205,1222) AND @LockMessageSeverity = 10)
            BEGIN
              SET @ReturnCode = ERROR_NUMBER()
            END

            GOTO NoAction
          END CATCH
        END

        -- Has the data in the statistics been modified since the statistics was last updated?
        IF @CurrentStatisticsID IS NOT NULL AND @UpdateStatistics IS NOT NULL
        BEGIN
          SET @CurrentCommand = ''

          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '

          IF @PartitionLevelStatistics = 1 AND @CurrentIsIncremental = 1
          BEGIN
            SET @CurrentCommand += 'SELECT @ParamRowCount = [rows], @ParamModificationCounter = modification_counter FROM sys.dm_db_incremental_stats_properties (@ParamObjectID, @ParamStatisticsID) WHERE partition_number = @ParamPartitionNumber'
          END
          ELSE
          IF (@Version >= 10.504000 AND @Version < 11) OR @Version >= 11.03000
          BEGIN
            SET @CurrentCommand += 'SELECT @ParamRowCount = [rows], @ParamModificationCounter = modification_counter FROM sys.dm_db_stats_properties (@ParamObjectID, @ParamStatisticsID)'
          END
          ELSE
          BEGIN
            SET @CurrentCommand += 'SELECT @ParamRowCount = rowcnt, @ParamModificationCounter = rowmodctr FROM sys.sysindexes sysindexes WHERE sysindexes.[id] = @ParamObjectID AND sysindexes.[indid] = @ParamStatisticsID'
          END

          BEGIN TRY
            EXECUTE @CurrentDatabase_sp_executesql @stmt = @CurrentCommand, @params = N'@ParamObjectID int, @ParamStatisticsID int, @ParamPartitionNumber int, @ParamRowCount bigint OUTPUT, @ParamModificationCounter bigint OUTPUT', @ParamObjectID = @CurrentObjectID, @ParamStatisticsID = @CurrentStatisticsID, @ParamPartitionNumber = @CurrentPartitionNumber, @ParamRowCount = @CurrentRowCount OUTPUT, @ParamModificationCounter = @CurrentModificationCounter OUTPUT

            IF @CurrentRowCount IS NULL SET @CurrentRowCount = 0
            IF @CurrentModificationCounter IS NULL SET @CurrentModificationCounter = 0
          END TRY
          BEGIN CATCH
            SET @ErrorMessage = 'Msg ' + CAST(ERROR_NUMBER() AS nvarchar) + ', ' + ISNULL(ERROR_MESSAGE(),'') + CASE WHEN ERROR_NUMBER() = 1222 THEN ' The statistics ' + QUOTENAME(@CurrentStatisticsName) + ' on the object ' + QUOTENAME(@CurrentDatabaseName) + '.' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName) + ' is locked. The rows and modification_counter could not be checked.' ELSE '' END
            SET @Severity = CASE WHEN ERROR_NUMBER() IN(1205,1222) THEN @LockMessageSeverity ELSE 16 END
            RAISERROR('%s',@Severity,1,@ErrorMessage) WITH NOWAIT
            RAISERROR(@EmptyLine,10,1) WITH NOWAIT

            IF NOT (ERROR_NUMBER() IN(1205,1222) AND @LockMessageSeverity = 10)
            BEGIN
              SET @ReturnCode = ERROR_NUMBER()
            END

            GOTO NoAction
          END CATCH
        END

        -- Is the index fragmented?
        IF @CurrentIndexID IS NOT NULL
        AND @CurrentOnReadOnlyFileGroup = 0
        AND EXISTS(SELECT * FROM @ActionsPreferred)
        AND (EXISTS(SELECT [Priority], [Action], COUNT(*) FROM @ActionsPreferred GROUP BY [Priority], [Action] HAVING COUNT(*) <> 3) OR @MinNumberOfPages > 0 OR @MaxNumberOfPages IS NOT NULL)
        AND NOT (SERVERPROPERTY('EngineEdition') = 8 AND @CurrentDatabaseName IN ('master', 'model'))
        BEGIN
          SET @CurrentCommand = ''

          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '

          SET @CurrentCommand += 'SELECT @ParamFragmentationLevel = MAX(avg_fragmentation_in_percent), @ParamPageCount = SUM(page_count) FROM sys.dm_db_index_physical_stats(DB_ID(@ParamDatabaseName), @ParamObjectID, @ParamIndexID, @ParamPartitionNumber, ''LIMITED'') WHERE alloc_unit_type_desc = ''IN_ROW_DATA'' AND index_level = 0'

          BEGIN TRY
            EXECUTE sp_executesql @stmt = @CurrentCommand, @params = N'@ParamDatabaseName nvarchar(max), @ParamObjectID int, @ParamIndexID int, @ParamPartitionNumber int, @ParamFragmentationLevel float OUTPUT, @ParamPageCount bigint OUTPUT', @ParamDatabaseName = @CurrentDatabaseName, @ParamObjectID = @CurrentObjectID, @ParamIndexID = @CurrentIndexID, @ParamPartitionNumber = @CurrentPartitionNumber, @ParamFragmentationLevel = @CurrentFragmentationLevel OUTPUT, @ParamPageCount = @CurrentPageCount OUTPUT
          END TRY
          BEGIN CATCH
            SET @ErrorMessage = 'Msg ' + CAST(ERROR_NUMBER() AS nvarchar) + ', ' + ISNULL(ERROR_MESSAGE(),'') + CASE WHEN ERROR_NUMBER() = 1222 THEN ' The index ' + QUOTENAME(@CurrentIndexName) + ' on the object ' + QUOTENAME(@CurrentDatabaseName) + '.' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName) + ' is locked. The page_count and avg_fragmentation_in_percent could not be checked.' ELSE '' END
            SET @Severity = CASE WHEN ERROR_NUMBER() IN(1205,1222) THEN @LockMessageSeverity ELSE 16 END
            RAISERROR('%s',@Severity,1,@ErrorMessage) WITH NOWAIT
            RAISERROR(@EmptyLine,10,1) WITH NOWAIT

            IF NOT (ERROR_NUMBER() IN(1205,1222) AND @LockMessageSeverity = 10)
            BEGIN
              SET @ReturnCode = ERROR_NUMBER()
            END

            GOTO NoAction
          END CATCH
        END

        -- Select fragmentation group
        IF @CurrentIndexID IS NOT NULL AND @CurrentOnReadOnlyFileGroup = 0 AND EXISTS(SELECT * FROM @ActionsPreferred)
        BEGIN
          SET @CurrentFragmentationGroup = CASE
          WHEN @CurrentFragmentationLevel >= @FragmentationLevel2 THEN 'High'
          WHEN @CurrentFragmentationLevel >= @FragmentationLevel1 AND @CurrentFragmentationLevel < @FragmentationLevel2 THEN 'Medium'
          WHEN @CurrentFragmentationLevel < @FragmentationLevel1 THEN 'Low'
          END
        END

        -- Which actions are allowed?
        IF @CurrentIndexID IS NOT NULL AND EXISTS(SELECT * FROM @ActionsPreferred)
        BEGIN
          IF NOT (@CurrentOnReadOnlyFileGroup = 1)
          AND NOT (@CurrentIsMemoryOptimized = 1)
          AND NOT (@CurrentAllowPageLocks = 0)
          BEGIN
            INSERT INTO @CurrentActionsAllowed ([Action])
            VALUES ('INDEX_REORGANIZE')
          END
          IF NOT (@CurrentOnReadOnlyFileGroup = 1)
          AND NOT (@CurrentIsMemoryOptimized = 1)
          BEGIN
            INSERT INTO @CurrentActionsAllowed ([Action])
            VALUES ('INDEX_REBUILD_OFFLINE')
          END
          IF SERVERPROPERTY('EngineEdition') IN (3, 5, 8)
          AND NOT (@CurrentOnReadOnlyFileGroup = 1)
          AND NOT (@CurrentIsMemoryOptimized = 1)
          AND NOT (@CurrentIsPartition = 1 AND @Version < 12)
          AND NOT (@CurrentIndexType = 1 AND @CurrentIsImageText = 1)
          AND NOT (@CurrentIndexType = 1 AND @CurrentIsFileStream = 1)
          AND NOT (@CurrentIndexType = 1 AND @CurrentIsNewLOB = 1 AND @Version < 11)
          AND NOT (@CurrentIndexType = 2 AND @CurrentIsNewLOB = 1 AND @Version < 11)
          AND NOT (@CurrentIndexType = 3)
          AND NOT (@CurrentIndexType = 4)
          AND NOT (@CurrentIndexType = 5 AND @Version < 15)
          AND NOT (@CurrentIndexType = 6 AND @Version < 14)
          AND NOT (@CurrentIndexType = 1 AND @CurrentHasNonClusteredColumnstore = 1 AND @Version < 13)
          AND NOT (@CurrentIndexType = 2 AND @CurrentHasClusteredColumnstore = 1 AND @Version < 15)
          AND NOT (@CurrentIndexType = 2 AND @CurrentHasNonClusteredColumnstore = 1 AND @Version < 13)
          BEGIN
            INSERT INTO @CurrentActionsAllowed ([Action])
            VALUES ('INDEX_REBUILD_ONLINE')
          END
        END

        -- Decide action
        IF @CurrentIndexID IS NOT NULL
        AND EXISTS(SELECT * FROM @ActionsPreferred)
        AND (@CurrentPageCount >= @MinNumberOfPages OR @MinNumberOfPages = 0)
        AND (@CurrentPageCount <= @MaxNumberOfPages OR @MaxNumberOfPages IS NULL)
        AND @CurrentResumableIndexOperation = 0
        BEGIN
          IF EXISTS(SELECT [Priority], [Action], COUNT(*) FROM @ActionsPreferred GROUP BY [Priority], [Action] HAVING COUNT(*) <> 3)
          BEGIN
            SELECT @CurrentAction = [Action]
            FROM @ActionsPreferred
            WHERE FragmentationGroup = @CurrentFragmentationGroup
            AND [Priority] = (SELECT MIN([Priority])
                              FROM @ActionsPreferred
                              WHERE FragmentationGroup = @CurrentFragmentationGroup
                              AND [Action] IN (SELECT [Action] FROM @CurrentActionsAllowed))
          END
          ELSE
          BEGIN
            SELECT @CurrentAction = [Action]
            FROM @ActionsPreferred
            WHERE [Priority] = (SELECT MIN([Priority])
                                FROM @ActionsPreferred
                                WHERE [Action] IN (SELECT [Action] FROM @CurrentActionsAllowed))
          END
        END

        IF @CurrentResumableIndexOperation = 1
        BEGIN
          SET @CurrentAction = 'INDEX_REBUILD_ONLINE'
        END

        -- Workaround for limitation in SQL Server, http://support.microsoft.com/kb/2292737
        IF @CurrentIndexID IS NOT NULL
        BEGIN
          SET @CurrentMaxDOP = @MaxDOP

          IF @CurrentAction = 'INDEX_REBUILD_ONLINE' AND @CurrentAllowPageLocks = 0
          BEGIN
            SET @CurrentMaxDOP = 1
          END
        END

        -- Update statistics?
        IF @CurrentStatisticsID IS NOT NULL
        AND ((@UpdateStatistics = 'ALL' AND (@CurrentIndexType IN (1,2,3,4,7) OR @CurrentIndexID IS NULL)) OR (@UpdateStatistics = 'INDEX' AND @CurrentIndexID IS NOT NULL AND @CurrentIndexType IN (1,2,3,4,7)) OR (@UpdateStatistics = 'COLUMNS' AND @CurrentIndexID IS NULL))
        AND ((@OnlyModifiedStatistics = 'N' AND @StatisticsModificationLevel IS NULL) OR (@OnlyModifiedStatistics = 'Y' AND @CurrentModificationCounter > 0) OR ((@CurrentModificationCounter * 1. / NULLIF(@CurrentRowCount,0)) * 100 >= @StatisticsModificationLevel) OR (@StatisticsModificationLevel IS NOT NULL AND @CurrentModificationCounter > 0 AND (@CurrentModificationCounter >= SQRT(@CurrentRowCount * 1000))) OR (@CurrentIsMemoryOptimized = 1 AND NOT (@Version >= 13 OR SERVERPROPERTY('EngineEdition') IN (5,8))))
        AND ((@CurrentIsPartition = 0 AND (@CurrentAction NOT IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') OR @CurrentAction IS NULL)) OR (@CurrentIsPartition = 1 AND (@CurrentPartitionNumber = @CurrentPartitionCount OR (@PartitionLevelStatistics = 1 AND @CurrentIsIncremental = 1))))
        BEGIN
          SET @CurrentUpdateStatistics = 'Y'
        END
        ELSE
        BEGIN
          SET @CurrentUpdateStatistics = 'N'
        END

        SET @CurrentStatisticsSample = @StatisticsSample
        SET @CurrentStatisticsResample = @StatisticsResample

        -- Memory-optimized tables only supports FULLSCAN and RESAMPLE in SQL Server 2014
        IF @CurrentIsMemoryOptimized = 1 AND NOT (@Version >= 13 OR SERVERPROPERTY('EngineEdition') IN (5,8)) AND (@CurrentStatisticsSample <> 100 OR @CurrentStatisticsSample IS NULL)
        BEGIN
          SET @CurrentStatisticsSample = NULL
          SET @CurrentStatisticsResample = 'Y'
        END

        -- Incremental statistics only supports RESAMPLE
        IF @PartitionLevelStatistics = 1 AND @CurrentIsIncremental = 1
        BEGIN
          SET @CurrentStatisticsSample = NULL
          SET @CurrentStatisticsResample = 'Y'
        END

        -- Create index comment
        IF @CurrentIndexID IS NOT NULL
        BEGIN
          SET @CurrentComment = 'ObjectType: ' + CASE WHEN @CurrentObjectType = 'U' THEN 'Table' WHEN @CurrentObjectType = 'V' THEN 'View' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'IndexType: ' + CASE WHEN @CurrentIndexType = 1 THEN 'Clustered' WHEN @CurrentIndexType = 2 THEN 'NonClustered' WHEN @CurrentIndexType = 3 THEN 'XML' WHEN @CurrentIndexType = 4 THEN 'Spatial' WHEN @CurrentIndexType = 5 THEN 'Clustered Columnstore' WHEN @CurrentIndexType = 6 THEN 'NonClustered Columnstore' WHEN @CurrentIndexType = 7 THEN 'NonClustered Hash' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'ImageText: ' + CASE WHEN @CurrentIsImageText = 1 THEN 'Yes' WHEN @CurrentIsImageText = 0 THEN 'No' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'NewLOB: ' + CASE WHEN @CurrentIsNewLOB = 1 THEN 'Yes' WHEN @CurrentIsNewLOB = 0 THEN 'No' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'FileStream: ' + CASE WHEN @CurrentIsFileStream = 1 THEN 'Yes' WHEN @CurrentIsFileStream = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 12 AND @CurrentIndexType NOT IN(5, 6) SET @CurrentComment += 'HasClusteredColumnstore: ' + CASE WHEN @CurrentHasClusteredColumnstore = 1 THEN 'Yes' WHEN @CurrentHasClusteredColumnstore = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 11 AND @CurrentIndexType NOT IN(5, 6) SET @CurrentComment += 'HasNonClusteredColumnstore: ' + CASE WHEN @CurrentHasNonClusteredColumnstore = 1 THEN 'Yes' WHEN @CurrentHasNonClusteredColumnstore = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 14 AND @Resumable = 'Y' SET @CurrentComment += 'Computed: ' + CASE WHEN @CurrentIsComputed = 1 THEN 'Yes' WHEN @CurrentIsComputed = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 14 AND @Resumable = 'Y' AND @CurrentIndexType = 2 SET @CurrentComment += 'ClusteredIndexComputed: ' + CASE WHEN @CurrentIsClusteredIndexComputed = 1 THEN 'Yes' WHEN @CurrentIsClusteredIndexComputed = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 14 AND @Resumable = 'Y' SET @CurrentComment += 'Timestamp: ' + CASE WHEN @CurrentIsTimestamp = 1 THEN 'Yes' WHEN @CurrentIsTimestamp = 0 THEN 'No' ELSE 'N/A' END + ', '
          IF @Version >= 14 AND @Resumable = 'Y' SET @CurrentComment += 'HasFilter: ' + CASE WHEN @CurrentHasFilter = 1 THEN 'Yes' WHEN @CurrentHasFilter = 0 THEN 'No' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'AllowPageLocks: ' + CASE WHEN @CurrentAllowPageLocks = 1 THEN 'Yes' WHEN @CurrentAllowPageLocks = 0 THEN 'No' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'PageCount: ' + ISNULL(CAST(@CurrentPageCount AS nvarchar),'N/A') + ', '
          SET @CurrentComment += 'Fragmentation: ' + ISNULL(CAST(@CurrentFragmentationLevel AS nvarchar),'N/A')
        END

        IF @CurrentIndexID IS NOT NULL AND (@CurrentPageCount IS NOT NULL OR @CurrentFragmentationLevel IS NOT NULL)
        BEGIN
        SET @CurrentExtendedInfo = (SELECT *
                                    FROM (SELECT CAST(@CurrentPageCount AS nvarchar) AS [PageCount],
                                                 CAST(@CurrentFragmentationLevel AS nvarchar) AS Fragmentation
                                    ) ExtendedInfo FOR XML RAW('ExtendedInfo'), ELEMENTS)
        END

        IF @CurrentIndexID IS NOT NULL AND @CurrentAction IS NOT NULL AND (SYSDATETIME() < DATEADD(SECOND,@TimeLimit,@StartTime) OR @TimeLimit IS NULL)
        BEGIN
          SET @CurrentDatabaseContext = @CurrentDatabaseName

          SET @CurrentCommandType = 'ALTER_INDEX'

          SET @CurrentCommand = ''
          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '
          SET @CurrentCommand += 'ALTER INDEX ' + QUOTENAME(@CurrentIndexName) + ' ON ' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName)
          IF @CurrentResumableIndexOperation = 1 SET @CurrentCommand += ' RESUME'
          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @CurrentResumableIndexOperation = 0 SET @CurrentCommand += ' REBUILD'
          IF @CurrentAction IN('INDEX_REORGANIZE') AND @CurrentResumableIndexOperation = 0 SET @CurrentCommand += ' REORGANIZE'
          IF @CurrentIsPartition = 1 AND @CurrentResumableIndexOperation = 0 SET @CurrentCommand += ' PARTITION = ' + CAST(@CurrentPartitionNumber AS nvarchar)

          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @SortInTempdb = 'Y' AND @CurrentIndexType IN(1,2,3,4) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'SORT_IN_TEMPDB = ON'
          END

          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @SortInTempdb = 'N' AND @CurrentIndexType IN(1,2,3,4) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'SORT_IN_TEMPDB = OFF'
          END

          IF @CurrentAction = 'INDEX_REBUILD_ONLINE' AND (@CurrentIsPartition = 0 OR @Version >= 12) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'ONLINE = ON' + CASE WHEN @WaitAtLowPriorityMaxDuration IS NOT NULL THEN ' (WAIT_AT_LOW_PRIORITY (MAX_DURATION = ' + CAST(@WaitAtLowPriorityMaxDuration AS nvarchar) + ', ABORT_AFTER_WAIT = ' + UPPER(@WaitAtLowPriorityAbortAfterWait) + '))' ELSE '' END
          END

          IF @CurrentAction = 'INDEX_REBUILD_OFFLINE' AND (@CurrentIsPartition = 0 OR @Version >= 12) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'ONLINE = OFF'
          END

          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @CurrentMaxDOP IS NOT NULL
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'MAXDOP = ' + CAST(@CurrentMaxDOP AS nvarchar)
          END

          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @FillFactor IS NOT NULL AND @CurrentIsPartition = 0 AND @CurrentIndexType IN(1,2,3,4) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'FILLFACTOR = ' + CAST(@FillFactor AS nvarchar)
          END

          IF @CurrentAction IN('INDEX_REBUILD_ONLINE','INDEX_REBUILD_OFFLINE') AND @PadIndex = 'Y' AND @CurrentIsPartition = 0 AND @CurrentIndexType IN(1,2,3,4) AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'PAD_INDEX = ON'
          END

          IF (@Version >= 14 OR SERVERPROPERTY('EngineEdition') IN (5,8)) AND @CurrentAction = 'INDEX_REBUILD_ONLINE' AND @CurrentResumableIndexOperation = 0
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT CASE WHEN @Resumable = 'Y' AND @CurrentIndexType IN(1,2) AND @CurrentIsComputed = 0 AND @CurrentIsClusteredIndexComputed = 0 AND @CurrentIsTimestamp = 0 AND @CurrentHasFilter = 0 THEN 'RESUMABLE = ON' ELSE 'RESUMABLE = OFF' END
          END

          IF (@Version >= 14 OR SERVERPROPERTY('EngineEdition') IN (5,8)) AND @CurrentAction = 'INDEX_REBUILD_ONLINE' AND @Resumable = 'Y'  AND @CurrentIndexType IN(1,2) AND @CurrentIsComputed = 0 AND @CurrentIsClusteredIndexComputed = 0 AND @CurrentIsTimestamp = 0 AND @CurrentHasFilter = 0 AND @TimeLimit IS NOT NULL
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'MAX_DURATION = ' + CAST(DATEDIFF(MINUTE,SYSDATETIME(),DATEADD(SECOND,@TimeLimit,@StartTime)) AS nvarchar(max))
          END

          IF @CurrentAction IN('INDEX_REORGANIZE') AND @LOBCompaction = 'Y'
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'LOB_COMPACTION = ON'
          END

          IF @CurrentAction IN('INDEX_REORGANIZE') AND @LOBCompaction = 'N'
          BEGIN
            INSERT INTO @CurrentAlterIndexWithClauseArguments (Argument)
            SELECT 'LOB_COMPACTION = OFF'
          END

          IF EXISTS (SELECT * FROM @CurrentAlterIndexWithClauseArguments)
          BEGIN
            SET @CurrentAlterIndexWithClause = ' WITH ('

            WHILE (1 = 1)
            BEGIN
              SELECT TOP 1 @CurrentAlterIndexArgumentID = ID,
                           @CurrentAlterIndexArgument = Argument
              FROM @CurrentAlterIndexWithClauseArguments
              WHERE Added = 0
              ORDER BY ID ASC

              IF @@ROWCOUNT = 0
              BEGIN
                BREAK
              END

              SET @CurrentAlterIndexWithClause += @CurrentAlterIndexArgument + ', '

              UPDATE @CurrentAlterIndexWithClauseArguments
              SET Added = 1
              WHERE [ID] = @CurrentAlterIndexArgumentID
            END

            SET @CurrentAlterIndexWithClause = RTRIM(@CurrentAlterIndexWithClause)

            SET @CurrentAlterIndexWithClause = LEFT(@CurrentAlterIndexWithClause,LEN(@CurrentAlterIndexWithClause) - 1)

            SET @CurrentAlterIndexWithClause = @CurrentAlterIndexWithClause + ')'
          END

          IF @CurrentAlterIndexWithClause IS NOT NULL SET @CurrentCommand += @CurrentAlterIndexWithClause

          EXECUTE @CurrentCommandOutput = dbo.CommandExecute @DatabaseContext = @CurrentDatabaseName, @Command = @CurrentCommand, @CommandType = @CurrentCommandType, @Mode = 2, @Comment = @CurrentComment, @DatabaseName = @CurrentDatabaseName, @SchemaName = @CurrentSchemaName, @ObjectName = @CurrentObjectName, @ObjectType = @CurrentObjectType, @IndexName = @CurrentIndexName, @IndexType = @CurrentIndexType, @PartitionNumber = @CurrentPartitionNumber, @ExtendedInfo = @CurrentExtendedInfo, @LockMessageSeverity = @LockMessageSeverity, @ExecuteAsUser = @ExecuteAsUser, @LogToTable = @LogToTable, @Execute = @Execute
          SET @Error = @@ERROR
          IF @Error <> 0 SET @CurrentCommandOutput = @Error
          IF @CurrentCommandOutput <> 0 SET @ReturnCode = @CurrentCommandOutput

          IF @Delay > 0
          BEGIN
            SET @CurrentDelay = DATEADD(ss,@Delay,'1900-01-01')
            WAITFOR DELAY @CurrentDelay
          END
        END

        SET @CurrentMaxDOP = @MaxDOP

        -- Create statistics comment
        IF @CurrentStatisticsID IS NOT NULL
        BEGIN
          SET @CurrentComment = 'ObjectType: ' + CASE WHEN @CurrentObjectType = 'U' THEN 'Table' WHEN @CurrentObjectType = 'V' THEN 'View' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'IndexType: ' + CASE WHEN @CurrentIndexID IS NOT NULL THEN 'Index' ELSE 'Column' END + ', '
          IF @CurrentIndexID IS NOT NULL SET @CurrentComment += 'IndexType: ' + CASE WHEN @CurrentIndexType = 1 THEN 'Clustered' WHEN @CurrentIndexType = 2 THEN 'NonClustered' WHEN @CurrentIndexType = 3 THEN 'XML' WHEN @CurrentIndexType = 4 THEN 'Spatial' WHEN @CurrentIndexType = 5 THEN 'Clustered Columnstore' WHEN @CurrentIndexType = 6 THEN 'NonClustered Columnstore' WHEN @CurrentIndexType = 7 THEN 'NonClustered Hash' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'Incremental: ' + CASE WHEN @CurrentIsIncremental = 1 THEN 'Y' WHEN @CurrentIsIncremental = 0 THEN 'N' ELSE 'N/A' END + ', '
          SET @CurrentComment += 'RowCount: ' + ISNULL(CAST(@CurrentRowCount AS nvarchar),'N/A') + ', '
          SET @CurrentComment += 'ModificationCounter: ' + ISNULL(CAST(@CurrentModificationCounter AS nvarchar),'N/A')
        END

        IF @CurrentStatisticsID IS NOT NULL AND (@CurrentRowCount IS NOT NULL OR @CurrentModificationCounter IS NOT NULL)
        BEGIN
        SET @CurrentExtendedInfo = (SELECT *
                                    FROM (SELECT CAST(@CurrentRowCount AS nvarchar) AS [RowCount],
                                                 CAST(@CurrentModificationCounter AS nvarchar) AS ModificationCounter
                                    ) ExtendedInfo FOR XML RAW('ExtendedInfo'), ELEMENTS)
        END

        IF @CurrentStatisticsID IS NOT NULL AND @CurrentUpdateStatistics = 'Y' AND (SYSDATETIME() < DATEADD(SECOND,@TimeLimit,@StartTime) OR @TimeLimit IS NULL)
        BEGIN
          SET @CurrentDatabaseContext = @CurrentDatabaseName

          SET @CurrentCommandType = 'UPDATE_STATISTICS'

          SET @CurrentCommand = ''
          IF @LockTimeout IS NOT NULL SET @CurrentCommand = 'SET LOCK_TIMEOUT ' + CAST(@LockTimeout * 1000 AS nvarchar) + '; '
          SET @CurrentCommand += 'UPDATE STATISTICS ' + QUOTENAME(@CurrentSchemaName) + '.' + QUOTENAME(@CurrentObjectName) + ' ' + QUOTENAME(@CurrentStatisticsName)

          IF @CurrentMaxDOP IS NOT NULL AND ((@Version >= 12.06024 AND @Version < 13) OR (@Version >= 13.05026 AND @Version < 14) OR @Version >= 14.030154)
          BEGIN
            INSERT INTO @CurrentUpdateStatisticsWithClauseArguments (Argument)
            SELECT 'MAXDOP = ' + CAST(@CurrentMaxDOP AS nvarchar)
          END

          IF @CurrentStatisticsSample = 100
          BEGIN
            INSERT INTO @CurrentUpdateStatisticsWithClauseArguments (Argument)
            SELECT 'FULLSCAN'
          END

          IF @CurrentStatisticsSample IS NOT NULL AND @CurrentStatisticsSample <> 100
          BEGIN
            INSERT INTO @CurrentUpdateStatisticsWithClauseArguments (Argument)
            SELECT 'SAMPLE ' + CAST(@CurrentStatisticsSample AS nvarchar) + ' PERCENT'
          END

          IF @CurrentNoRecompute = 1
          BEGIN
            INSERT INTO @CurrentUpdateStatisticsWithClauseArguments (Argument)
            SELECT 'NORECOMPUTE'
          END

          IF @CurrentStatisticsResample = 'Y'
          BEGIN
            INSERT INTO @CurrentUpdateStatisticsWithClauseArguments (Argument)
            SELECT 'RESAMPLE'
          END

          IF EXISTS (SELECT * FROM @CurrentUpdateStatisticsWithClauseArguments)
          BEGIN
            SET @CurrentUpdateStatisticsWithClause = ' WITH'

            WHILE (1 = 1)
            BEGIN
              SELECT TOP 1 @CurrentUpdateStatisticsArgumentID = ID,
                           @CurrentUpdateStatisticsArgument = Argument
              FROM @CurrentUpdateStatisticsWithClauseArguments
              WHERE Added = 0
              ORDER BY ID ASC

              IF @@ROWCOUNT = 0
              BEGIN
                BREAK
              END

              SET @CurrentUpdateStatisticsWithClause = @CurrentUpdateStatisticsWithClause + ' ' + @CurrentUpdateStatisticsArgument + ','

              UPDATE @CurrentUpdateStatisticsWithClauseArguments
              SET Added = 1
              WHERE [ID] = @CurrentUpdateStatisticsArgumentID
            END

            SET @CurrentUpdateStatisticsWithClause = LEFT(@CurrentUpdateStatisticsWithClause,LEN(@CurrentUpdateStatisticsWithClause) - 1)
          END

          IF @CurrentUpdateStatisticsWithClause IS NOT NULL SET @CurrentCommand += @CurrentUpdateStatisticsWithClause

          IF @PartitionLevelStatistics = 1 AND @CurrentIsIncremental = 1 AND @CurrentPartitionNumber IS NOT NULL SET @CurrentCommand += ' ON PARTITIONS(' + CAST(@CurrentPartitionNumber AS nvarchar(max)) + ')'

          EXECUTE @CurrentCommandOutput = dbo.CommandExecute @DatabaseContext = @CurrentDatabaseName, @Command = @CurrentCommand, @CommandType = @CurrentCommandType, @Mode = 2, @Comment = @CurrentComment, @DatabaseName = @CurrentDatabaseName, @SchemaName = @CurrentSchemaName, @ObjectName = @CurrentObjectName, @ObjectType = @CurrentObjectType, @IndexName = @CurrentIndexName, @IndexType = @CurrentIndexType, @StatisticsName = @CurrentStatisticsName, @ExtendedInfo = @CurrentExtendedInfo, @LockMessageSeverity = @LockMessageSeverity, @ExecuteAsUser = @ExecuteAsUser, @LogToTable = @LogToTable, @Execute = @Execute
          SET @Error = @@ERROR
          IF @Error <> 0 SET @CurrentCommandOutput = @Error
          IF @CurrentCommandOutput <> 0 SET @ReturnCode = @CurrentCommandOutput
        END

        NoAction:

        -- Update that the index or statistics is completed
        UPDATE @tmpIndexesStatistics
        SET Completed = 1
        WHERE Selected = 1
        AND Completed = 0
        AND [Order] = @CurrentIxOrder
        AND ID = @CurrentIxID

        -- Clear variables
        SET @CurrentDatabaseContext = NULL

        SET @CurrentCommand = NULL
        SET @CurrentCommandOutput = NULL
        SET @CurrentCommandType = NULL
        SET @CurrentComment = NULL
        SET @CurrentExtendedInfo = NULL

        SET @CurrentIxID = NULL
        SET @CurrentIxOrder = NULL
        SET @CurrentSchemaID = NULL
        SET @CurrentSchemaName = NULL
        SET @CurrentObjectID = NULL
        SET @CurrentObjectName = NULL
        SET @CurrentObjectType = NULL
        SET @CurrentIsMemoryOptimized = NULL
        SET @CurrentIndexID = NULL
        SET @CurrentIndexName = NULL
        SET @CurrentIndexType = NULL
        SET @CurrentStatisticsID = NULL
        SET @CurrentStatisticsName = NULL
        SET @CurrentPartitionID = NULL
        SET @CurrentPartitionNumber = NULL
        SET @CurrentPartitionCount = NULL
        SET @CurrentIsPartition = NULL
        SET @CurrentIndexExists = NULL
        SET @CurrentStatisticsExists = NULL
        SET @CurrentIsImageText = NULL
        SET @CurrentIsNewLOB = NULL
        SET @CurrentIsFileStream = NULL
        SET @CurrentHasClusteredColumnstore = NULL
        SET @CurrentHasNonClusteredColumnstore = NULL
        SET @CurrentIsComputed = NULL
        SET @CurrentIsClusteredIndexComputed = NULL
        SET @CurrentIsTimestamp = NULL
        SET @CurrentAllowPageLocks = NULL
        SET @CurrentHasFilter = NULL
        SET @CurrentNoRecompute = NULL
        SET @CurrentIsIncremental = NULL
        SET @CurrentRowCount = NULL
        SET @CurrentModificationCounter = NULL
        SET @CurrentOnReadOnlyFileGroup = NULL
        SET @CurrentResumableIndexOperation = NULL
        SET @CurrentFragmentationLevel = NULL
        SET @CurrentPageCount = NULL
        SET @CurrentFragmentationGroup = NULL
        SET @CurrentAction = NULL
        SET @CurrentMaxDOP = NULL
        SET @CurrentUpdateStatistics = NULL
        SET @CurrentStatisticsSample = NULL
        SET @CurrentStatisticsResample = NULL
        SET @CurrentAlterIndexArgumentID = NULL
        SET @CurrentAlterIndexArgument = NULL
        SET @CurrentAlterIndexWithClause = NULL
        SET @CurrentUpdateStatisticsArgumentID = NULL
        SET @CurrentUpdateStatisticsArgument = NULL
        SET @CurrentUpdateStatisticsWithClause = NULL

        DELETE FROM @CurrentActionsAllowed
        DELETE FROM @CurrentAlterIndexWithClauseArguments
        DELETE FROM @CurrentUpdateStatisticsWithClauseArguments

      END

    END

    IF @CurrentDatabaseState = 'SUSPECT'
    BEGIN
      SET @ErrorMessage = 'The database ' + QUOTENAME(@CurrentDatabaseName) + ' is in a SUSPECT state.'
      RAISERROR('%s',16,1,@ErrorMessage) WITH NOWAIT
      RAISERROR(@EmptyLine,10,1) WITH NOWAIT
      SET @Error = @@ERROR
    END

    -- Update that the database is completed
    IF @DatabasesInParallel = 'Y'
    BEGIN
      UPDATE dbo.QueueDatabase
      SET DatabaseEndTime = SYSDATETIME()
      WHERE QueueID = @QueueID
      AND DatabaseName = @CurrentDatabaseName
    END
    ELSE
    BEGIN
      UPDATE @tmpDatabases
      SET Completed = 1
      WHERE Selected = 1
      AND Completed = 0
      AND ID = @CurrentDBID
    END

    -- Clear variables
    SET @CurrentDBID = NULL
    SET @CurrentDatabaseName = NULL

    SET @CurrentDatabase_sp_executesql = NULL

    SET @CurrentExecuteAsUserExists = NULL
    SET @CurrentUserAccess = NULL
    SET @CurrentIsReadOnly = NULL
    SET @CurrentDatabaseState = NULL
    SET @CurrentInStandby = NULL
    SET @CurrentRecoveryModel = NULL

    SET @CurrentReplicaID = NULL
    SET @CurrentAvailabilityGroupID = NULL
    SET @CurrentAvailabilityGroup = NULL
    SET @CurrentAvailabilityGroupRole = NULL
    SET @CurrentDatabaseMirroringRole = NULL

    SET @CurrentCommand = NULL

    DELETE FROM @tmpIndexesStatistics

  END

  ----------------------------------------------------------------------------------------------------
  --// Log completing information                                                                 //--
  ----------------------------------------------------------------------------------------------------

  Logging:
  SET @EndMessage = 'Date and time: ' + CONVERT(nvarchar,SYSDATETIME(),120)
  RAISERROR('%s',10,1,@EndMessage) WITH NOWAIT

  RAISERROR(@EmptyLine,10,1) WITH NOWAIT

  IF @ReturnCode <> 0
  BEGIN
    RETURN @ReturnCode
  END

  ----------------------------------------------------------------------------------------------------

END

GO