Scripts to Drop and ReCreate Indexes in SQL Server 2005

SQL Server 2005 “GENERATE SCRIPTS” wizard does not have the option to generate the Index scripts alone from the database. The below script can be used to DROP and recreate the Indexes from the database.

Steps to be followed

1. Create a function to retrieve the list of key columns used in the Index definition (this function is useful for retrieving the multiple index columns in case of composite Index)

CREATE FUNCTION fGetIndexCols
(
@objname VARCHAR(50),
@indid INT
)
RETURNS NVARCHAR(131)
AS
BEGIN

DECLARE @keys NVARCHAR(2126)
DECLARE @i int, @thiskey NVARCHAR(131) , @objid BIGINT

SELECT @objid = object_id(@objname)
SELECT @keys = index_col(@objname, @indid, 1), @i = 2

IF (indexkey_property(@objid, @indid, 1, 'isdescending') = 1)
SELECT @keys = @keys + '(-)'
SELECT @thiskey = index_col(@objname, @indid, @i)
IF ((@thiskey is not null) and (indexkey_property(@objid, @indid, @i, 'isdescending') = 1))
SELECT @thiskey = @thiskey + '(-)'
WHILE (@thiskey is not null )
BEGIN

SELECT @keys = @keys + ', ' + @thiskey, @i = @i + 1
SELECT @thiskey = index_col(@objname, @indid, @i)
IF ((@thiskey is not null) and (indexkey_property(@objid, @indid, @i, 'isdescending') = 1))
SELECT @thiskey = @thiskey + '(-)'

END
RETURN (@KEYS)

END

2. Execute the below script to generate the CREATE INDEX statements from the database. I have written this script to generate the scripts for NON CLUSTERED indexes for clustered indexes change the where clause type_desc = ‘CLUSTERED’

SELECT 'CREATE ' +
CASE IS_UNIQUE WHEN 1 THEN 'UNIQUE ' ELSE ' ' END +
'NONCLUSTERED ' + ' INDEX '+
NAME + ' ' +' ON ' +
OBJECT_NAME (OBJECT_ID) +
'('+
DBO.fGetIndexCols (object_NAME(OBJECT_ID), index_id) +
')'+
' ON ['+
( SELECT GROUPNAME
FROM SYSFILEGROUPS
WHERE GROUPID = DATA_SPACE_ID
) + ']' IndexScript
FROM SYS.INDEXES
WHERE NAME IS NOT NULL
AND Is_Primary_Key =0
AND type_desc ='NONCLUSTERED'
AND OBJECT_ID > 97

3. Execute the below script to generate the DROP INDEX statements

SELECT ' DROP INDEX' + OBJECT_NAME (OBJECT_ID) +'.'+ NAME
FROM SYS.INDEXES
WHERE NAME IS NOT NULL
AND Is_Primary_Key =0
AND type_desc ='NONCLUSTERED'
AND OBJECT_ID > 97
I have continued this article with a modified query to generate index using included columns http://samsudeenb.blogspot.com/2009/07/this-article-is-continuation-of_09.html