MOBILE_API/DB/SPs/Proc_IndexRebuild.sql

USE [FastMoneyPro_Remit]
GO
/****** Object:  StoredProcedure [dbo].[Proc_IndexRebuild]    Script Date: 7/4/2019 11:35:48 AM ******/
DROP PROCEDURE [dbo].[Proc_IndexRebuild]
GO
/****** Object:  StoredProcedure [dbo].[Proc_IndexRebuild]    Script Date: 7/4/2019 11:35:48 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[Proc_IndexRebuild]
@dbname varchar(200)=null
AS
BEGIN

	-- 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;

	--select * from #work_to_do
	
	-- 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 WITH (MAXDOP=1)';
	        
			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;


END








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