<div class="codebody" id="code8353"> SET NOCOUNT ON; DECLARE @objectid int; DECLARE @indexid int; DECLARE @partitioncount bigint; DECLARE @schemaname sysname; DECLARE @objectname sysname; DECLARE @indexname sysname; DECLARE @partitionnum bigint; DECLARE @partitions bigint; DECLARE @frag float; DECLARE @command varchar(8000); DECLARE @dbId int; -- ensure the temporary table does not exist IF EXISTS (SELECT name FROM sys.objects WHERE name = 'work_to_do') DROP TABLE work_to_do; -- conditionally select from the function,converting object and index IDs to names. set @dbId=DB_ID(); 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 (@dbId,NULL,'LIMITED') WHERE avg_fragmentation_in_percent > 10.0 AND 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. FETCH NEXT FROM partitions INTO @objectid,@indexid,@partitionnum,@frag; WHILE @@FETCH_STATUS = 0 BEGIN; SELECT @objectname = o.name,@schemaname = s.name FROM sys.objects AS o JOIN sys.schemas as s ON s.schema_id = o.schema_id WHERE o.object_id = @objectid; SELECT @indexname = 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 BEGIN; SELECT @command = 'ALTER INDEX [' + @indexname + '] ON ' + @schemaname + '.[' + @objectname + '] REORGANIZE'; IF @partitioncount > 1 SELECT @command = @command + ' PARTITION=' + CONVERT (CHAR,@partitionnum); EXEC (@command); END; IF @frag >= 30.0 BEGIN; SELECT @command = 'ALTER INDEX [' + @indexname +'] ON ' + @schemaname + '.[' + @objectname + '] REBUILD'; IF @partitioncount > 1 SELECT @command = @command + ' PARTITION=' + CONVERT (CHAR,@partitionnum); EXEC (@command); END; PRINT 'Executed ' + @command; FETCH NEXT FROM partitions INTO @objectid,@frag; END; -- Close and deallocate the cursor. CLOSE partitions; DEALLOCATE partitions; -- drop the temporary table IF EXISTS (SELECT name FROM sys.objects WHERE name = 'work_to_do') DROP TABLE work_to_do; GO
