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  • A script job for rebuild DB in AX 2012

    -- Ensure a USE <databasename> statement has been executed first.
    SET NOCOUNT ON;
    DECLARE @objectid int;
    DECLARE @indexid int;
    DECLARE @partitioncount bigint;
    DECLARE @schemaname nvarchar(130); 
    DECLARE @objectname nvarchar(130); 
    DECLARE @indexname nvarchar(130); 
    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.
    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 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.
    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;
            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
                SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE';
            IF @frag >= 30.0
                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));
            EXEC (@command);
            PRINT N'Executed: ' + @command;
        END;
    
    -- Close and deallocate the cursor.
    CLOSE partitions;
    DEALLOCATE partitions;
    
    -- Drop the temporary table.
    DROP TABLE #work_to_do;
    GO
    

      

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  • 原文地址:https://www.cnblogs.com/sxypeace/p/4626137.html
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