?
Solved

Drop and add index usig a variable

Posted on 2014-03-27
2
Medium Priority
?
523 Views
Last Modified: 2014-03-27
Hello,

Trying to drop index on a table. But doesn't seem to work

DECLARE @indexName VARCHAR(50);
SELECT @indexName =  i.name
FROM sysobjects o, sysindexes i
WHERE  (o.id = i.id and o.name = 'MyTable') AND i.name like ('%NonClustered%')

DROP INDEX [@indexName] ON [dbo].[MyTable]

ALTER TABLE [dbo].[Link]
ALTER COLUMN [myColumn] [nvarchar](120)

CREATE INDEX [@indexName] ON [dbo].[MyTable] (myColumn)

"Cannot drop the index 'dbo.MyTable.@indexName', because it does not exist or you do not have permission."

I am able to get the correct index name but unable to execute drop index command with a variable.
0
Comment
Question by:sansoftura
2 Comments
 
LVL 38

Accepted Solution

by:
ste5an earned 1000 total points
ID: 39960276
You cannot use a variable in the DROP statement directly. Use dynamic SQL instead. E.g.

DECLARE @indexName VARCHAR(50);
SELECT @indexName =  i.name
FROM sysobjects o, sysindexes i
WHERE  (o.id = i.id and o.name = 'MyTable') AND i.name like ('%NonClustered%');

DECLARE @Sql NVARCHAR(MAX) = N'DROP INDEX ' + QUOTENAME(@indexName) +' ON [dbo].[MyTable]';
EXECUTE (@Sql);

ALTER TABLE [dbo].[Link]
ALTER COLUMN [myColumn] [nvarchar](120);

SET @Sql = N'CREATE INDEX ' + QUOTENAME(@indexName) +'  ON [dbo].[MyTable] (myColumn);';
EXECUTE (@Sql);

Open in new window

0
 
LVL 6

Author Closing Comment

by:sansoftura
ID: 39960287
Perfect!
0

Featured Post

What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

It is possible to export the data of a SQL Table in SSMS and generate INSERT statements. It's neatly tucked away in the generate scripts option of a database.
MSSQL DB-maintenance also needs implementation of multiple activities. However, unprecedented errors can hamper the database management. In that case, deploying Stellar SQL Database Toolkit ensures fast and accurate database and backup repair as wel…
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

590 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question