Create and Drop Index in SqlServer

--drop index

SELECT o.[name] AS [Table Name]
      ,i.[name] AS [Index Name]
      ,i.[fill_factor] AS [Existing Fill Factor]
      ,'DROP INDEX ' + QUOTENAME(i.[name]) + ' ON '
        +  QUOTENAME(DB_NAME(DB_ID())) + '.' + QUOTENAME(s.[name]) +'.' + QUOTENAME(o.[name]) + ' '
        + 'WITH ( ONLINE = OFF )' AS [DROP INDEX Statement]
FROM [sys].[indexes] i
INNER JOIN [sys].[objects] o
    ON i.[object_id] = o.[object_id]
AND o.[type] = 'U' AND i.[name] <> 'NULL'
INNER JOIN sys.[schemas] s
    ON o.[schema_id] = s.[schema_id]
INNER JOIN [sys].[stats] st
    ON i.[name] COLLATE Latin1_General_CI_AS = st.[name] COLLATE Latin1_General_CI_AS
    AND o.[object_id] = st.[object_id]
    AND o.[type] COLLATE Latin1_General_CI_AS = 'U'
WHERE i.[name] NOT IN (SELECT i.[name]
                       FROM [sys].[objects] o
                       INNER JOIN [sys].[indexes] i
                       ON o.[object_id] = i.[object_id]
                       INNER JOIN [sys].[columns] c
                       ON o.[object_id] = c.[object_id]
                       WHERE c.[is_identity] = 1
                       AND o.[type] = 'U'
                       AND i.[type_desc] = 'CLUSTERED')
AND o.name NOT LIKE 'sys%'
ORDER BY o.[name]

--create index


DECLARE @idxTableName SYSNAME
DECLARE @idxTableID INT
DECLARE @idxname SYSNAME
DECLARE @idxid INT
DECLARE @colCount INT
DECLARE @IxColumn SYSNAME
DECLARE @IxFirstColumn BIT
DECLARE @ColumnIDInTable INT
DECLARE @ColumnIDInIndex INT
DECLARE @IsIncludedColumn INT
DECLARE @sIncludeCols VARCHAR(4000)
DECLARE @sIndexCols VARCHAR(4000)
DECLARE @sSQL VARCHAR(4000)
DECLARE @rowcnt INT
DECLARE @sParamSQL VARCHAR(4000)
DECLARE @location SYSNAME
DECLARE @fillfactor INT
-- Get all the index info
DECLARE curidx CURSOR
FOR
SELECT object_name(si.object_id)
,si.object_id
,si.NAME
,si.index_id
FROM sys.indexes si
LEFT JOIN information_schema.table_constraints tc ON si.NAME = tc.constraint_name AND object_name(si.object_id) = tc.table_name
WHERE objectproperty(si.object_id, 'IsUserTable') = 1
ORDER BY object_name(si.object_id)
,si.index_id
OPEN curidx
FETCH NEXT
FROM curidx
INTO @idxTableName
,@idxTableID
,@idxname
,@idxid
--loop
WHILE (@@FETCH_STATUS = 0)
BEGIN
SET @sSQL = 'IF NOT EXISTS (SELECT 1 FROM SYS.INDEXES WHERE name = ''' + @idxname + ''')' + CHAR(13)
SET @sSQL = @sSQL + 'BEGIN' + CHAR(13)
SET @sSQL = @sSQL + 'CREATE '
-- Check if the index is unique
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsUnique') = 1)
SET @sSQL = @sSQL + 'UNIQUE '
-- Check if the index is clustered
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsClustered') = 1)
SET @sSQL = @sSQL + 'CLUSTERED '
SET @sSQL = @sSQL + 'INDEX ' + @idxname + ' ON ' + @idxTableName + CHAR(13) + '('
SET @sSQL = @sSQL + CHAR(13)
SET @colCount = 0
SELECT @fillfactor = fill_factor
FROM sys.indexes
WHERE name = @idxname
IF ISNULL(@fillfactor, 0) = 0
SET @fillfactor = 90
-- Get the number of cols in the index
SELECT @colCount = COUNT(*)
FROM sys.index_columns ic
INNER JOIN sys.columns sc ON ic.object_id = sc.object_id AND ic.column_id = sc.column_id
WHERE ic.object_id = @idxtableid AND index_id = @idxid AND ic.is_included_column = 0
-- Get the file group info
SELECT @location = f.[name]
FROM sys.indexes i
INNER JOIN sys.filegroups f ON i.data_space_id = f.data_space_id
INNER JOIN sys.all_objects o ON i.[object_id] = o.[object_id]
WHERE o.object_id = @idxTableID AND i.index_id = @idxid
-- Get all columns of the index
DECLARE curidxcolumn CURSOR
FOR
SELECT sc.column_id AS columnidintable
,sc.NAME
,ic.index_column_id columnidinindex
,ic.is_included_column AS isincludedcolumn
FROM sys.index_columns ic
INNER JOIN sys.columns sc ON ic.object_id = sc.object_id AND ic.column_id = sc.column_id
WHERE ic.object_id = @idxTableID AND index_id = @idxid
ORDER BY ic.index_column_id
SET @IxFirstColumn = 1
SET @sIncludeCols = ''
SET @sIndexCols = ''
SET @rowcnt = 0
OPEN curidxColumn
FETCH NEXT
FROM curidxColumn
INTO @ColumnIDInTable
,@IxColumn
,@ColumnIDInIndex
,@IsIncludedColumn
--loop
WHILE (@@FETCH_STATUS = 0)
BEGIN
IF @IsIncludedColumn = 0
BEGIN
SET @rowcnt = @rowcnt + 1
SET @sIndexCols = CHAR(9) + @sIndexCols + '[' + @IxColumn + ']'
-- Check the sort order of the index cols
IF (INDEXKEY_PROPERTY(@idxTableID, @idxid, @ColumnIDInIndex, 'IsDescending')) = 0
SET @sIndexCols = @sIndexCols + ' ASC '
ELSE
SET @sIndexCols = @sIndexCols + ' DESC '
IF @rowcnt < @colCount
SET @sIndexCols = @sIndexCols + ', '
END
ELSE
BEGIN
-- Check for any include columns
IF len(@sIncludeCols) > 0
SET @sIncludeCols = @sIncludeCols + ','
SET @sIncludeCols = @sIncludeCols + '[' + @IxColumn + ']'
END
FETCH NEXT
FROM curidxColumn
INTO @ColumnIDInTable
,@IxColumn
,@ColumnIDInIndex
,@IsIncludedColumn
END
CLOSE curidxColumn
DEALLOCATE curidxColumn
--append to the result
IF LEN(@sIncludeCols) > 0
SET @sIndexCols = @sSQL + @sIndexCols + CHAR(13) + ') ' + ' INCLUDE ( ' + @sIncludeCols + ' ) '
ELSE
SET @sIndexCols = @sSQL + @sIndexCols + CHAR(13) + ') '
-- Build the options
SET @sParamSQL = ' WITH (FILLFACTOR = ' + cast(isnull(@fillfactor, 90) AS VARCHAR(3)) + ', '
--set @sParamSQL = ' WITH ('
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsPadIndex') = 1)
SET @sParamSQL = @sParamSQL + ' PAD_INDEX = ON, '
ELSE
SET @sParamSQL = @sParamSQL + ' PAD_INDEX = OFF, '
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsPageLockDisallowed') = 1)
SET @sParamSQL = @sParamSQL + ' ALLOW_PAGE_LOCKS = ON, '
ELSE
SET @sParamSQL = @sParamSQL + ' ALLOW_PAGE_LOCKS = OFF, '
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsRowLockDisallowed') = 1)
SET @sParamSQL = @sParamSQL + ' ALLOW_ROW_LOCKS = ON, '
ELSE
SET @sParamSQL = @sParamSQL + ' ALLOW_ROW_LOCKS = OFF, '
IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsStatistics') = 1)
SET @sParamSQL = @sParamSQL + ' STATISTICS_NORECOMPUTE = ON, '
ELSE
SET @sParamSQL = @sParamSQL + ' STATISTICS_NORECOMPUTE = OFF, '
SET @sParamSQL = @sParamSQL + ' DROP_EXISTING = ON ) '
SET @sIndexCols = @sIndexCols + CHAR(13) + @sParamSQL + ' ON [' + @location + ']' + CHAR(13) + 'END ' + CHAR(10) + 'GO' + CHAR(13)
PRINT @sIndexCols
FETCH NEXT
FROM curidx
INTO @idxTableName
,@idxTableID
,@idxname
,@idxid
END
CLOSE curidx
DEALLOCATE curidx

--

Regards :

Vikram Singh Rana

Computer Science Engineer

9983384690