--- **** Maintenance Script, includes rebuild & reorganize index and update statistics ** --
-- Make Sure you have write USE <databasename> statement before executing statement.
-- USE <databasename>
SET NOCOUNT ON;
DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @partitioncount bigint;
DECLARE @schemaname nvarchar(500);
DECLARE @objectname nvarchar(500);
DECLARE @indexname nvarchar(500);
DECLARE @partitionnum bigint;
DECLARE @partitions bigint;
DECLARE @frag float;
DECLARE @command nvarchar(4000);
-- Conditionally select tables and indexes from the sys.dm_db_index_physical_stats function
-- and convert object and index IDs to names.
-- Drop the temporary table.
IF OBJECT_ID('tempdb..#work_to_do') IS NOT NULL DROP TABLE #work_to_do;
SELECT
object_id AS objectid,
index_id AS indexid,
partition_number AS partitionnum,
avg_fragmentation_in_percent AS frag
INTO #work_to_do
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'LIMITED')
WHERE index_id > 0;
-- Declare the cursor for the list of partitions to be processed.
DECLARE partitions CURSOR FOR SELECT * FROM #work_to_do;
-- Open the cursor.
OPEN partitions;
-- Loop through the partitions.
WHILE (1=1)
BEGIN;
FETCH NEXT
FROM partitions
INTO @objectid, @indexid, @partitionnum, @frag;
IF @@FETCH_STATUS < 0 BREAK;
SELECT @objectname = QUOTENAME(o.name), @schemaname = QUOTENAME(s.name)
FROM sys.objects AS o
JOIN sys.schemas as s ON s.schema_id = o.schema_id
WHERE o.object_id = @objectid AND (o.name<>'QueryNotificationErrorsQueue' AND o.Name<>'EventNotificationErrorsQueue' AND o.Name<>'ServiceBrokerQueue');
SELECT @indexname = QUOTENAME(name)
FROM sys.indexes
WHERE object_id = @objectid AND index_id = @indexid;
SELECT @partitioncount = count (*)
FROM sys.partitions
WHERE object_id = @objectid AND index_id = @indexid;
-- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding.
IF @frag < 30.0 OR @frag >= 5.0
SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE';
ELSE IF @frag >= 30.0 --OR @frag < 5.0
SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD';
IF @partitioncount > 1
SET @command = @command + N' PARTITION=' + CAST(@partitionnum AS nvarchar(10));
BEGIN TRY
IF(ISNULL(LEN(@indexname),0)>0 and ISNULL(LEN(@schemaname),0)>0 and ISNULL(LEN(@objectname),0)>0)
BEGIN
----print(@command)
EXEC (@command);
END
END TRY
BEGIN CATCH
PRINT @command +'=====> Failed <======'
SELECT -1
PRINT 'ErrorNumber: ' + CAST(ERROR_NUMBER() as VARCHAR(100)) +CHAR(13) +
'ErrorSeverity: '+ CAST(ERROR_SEVERITY() as VARCHAR(100)) +CHAR(13) +
'ErrorState: ' + CAST(ERROR_STATE() as VARCHAR(100)) +CHAR(13) +
--'ErrorProcedure: '+ CAST(ERROR_PROCEDURE() as VARCHAR(300)) +CHAR(13) --+
'ErrorLine: ' + CAST(ERROR_LINE() as VARCHAR(100)) +CHAR(13) +
'ErrorMessage: ' + ERROR_MESSAGE()
END CATCH
PRINT N'Executed: ' + @command;
-- Update statistics Starts
DECLARE @sqlQuery VARCHAR(800)
SELECT @sqlQuery= 'UPDATE STATISTICS ['+DB_NAME()+'].'+@schemaname+'.'+@objectname
BEGIN TRY
EXEC(@sqlQuery)
--PRINT @sqlQuery
END TRY
BEGIN CATCH
PRINT @sqlQuery +'=====> Failed <======'+ CAST(ERROR_NUMBER() as VARCHAR(20))
PRINT 'ErrorNumber: ' + CAST(ERROR_NUMBER() as VARCHAR(100)) +CHAR(13) +
'ErrorSeverity: '+ CAST(ERROR_SEVERITY() as VARCHAR(100)) +CHAR(13) +
'ErrorState: ' + CAST(ERROR_STATE() as VARCHAR(100)) +CHAR(13) +
--'ErrorProcedure: '+ CAST(ERROR_PROCEDURE() as VARCHAR(300)) +CHAR(13) --+
'ErrorLine: ' + CAST(ERROR_LINE() as VARCHAR(100)) +CHAR(13) +
'ErrorMessage: ' + ERROR_MESSAGE()
END CATCH
-- Update statistics Ends
END;
-- Close and deallocate the cursor.
CLOSE partitions;
DEALLOCATE partitions;
-- Drop the temporary table.
IF OBJECT_ID('tempdb..#work_to_do') IS NOT NULL DROP TABLE #work_to_do;
--------------- Start Statistics update starts-----------------