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Modify a stored procedure

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Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL database in Microsoft Fabric

This article describes how to modify a stored procedure in SQL Server by using SQL Server Management Studio or Transact-SQL.

Limitations

Transact-SQL stored procedures cannot be modified to be CLR stored procedures and vice versa.

If the previous procedure definition was created using WITH ENCRYPTION or WITH RECOMPILE, these options are enabled only if they are included in the ALTER PROCEDURE statement.

Permissions

Requires ALTER PROCEDURE permission on the procedure.

Use SQL Server Management Studio

To modify a procedure in SQL Server Management Studio:

  1. In Object Explorer, connect to an instance of Database Engine and then expand that instance.

  2. Expand Databases, expand the database in which the procedure belongs, and then expand Programmability.

  3. Expand Stored Procedures, right-click the procedure to modify, and then select Modify.

  4. Modify the text of the stored procedure.

  5. To test the syntax, on the Query menu, select Parse.

  6. To save the modifications to the procedure definition, on the Query menu, select Execute.

  7. To save the updated procedure definition as a Transact-SQL script, on the File menu, select Save As. Accept the file name or replace it with a new name, and then select Save.

Important

Validate all user input. Do not concatenate user input before you validate it. Never execute a command constructed from unvalidated user input. Unvalidated user input makes your database vulnerable a type of exploit called a SQL injection attack. For more information, see SQL injection.

Use Transact-SQL

To modify a procedure using T-SQL commands:

  1. In Object Explorer, connect to an instance of Database Engine and then expand that instance.

  2. Expand Databases, expand the database in which the procedure belongs. Or, from the tool bar, select the database from the list of available databases. For this example, select the AdventureWorks2022 database.

  3. On the File menu, select New Query.

  4. Copy and paste the following example into the query editor. The example creates the Purchasing.uspVendorAllInfo procedure, which returns the names of all the vendors in the Adventure Works Cycles database, the products they supply, their credit ratings, and their availability.

    CREATE PROCEDURE Purchasing.uspVendorAllInfo  
WITH EXECUTE AS CALLER  
AS  
    SET NOCOUNT ON;  
    SELECT v.Name AS Vendor, p.Name AS 'Product name',   
      v.CreditRating AS 'Rating',   
      v.ActiveFlag AS Availability  
    FROM Purchasing.Vendor v   
    INNER JOIN Purchasing.ProductVendor pv  
      ON v.BusinessEntityID = pv.BusinessEntityID   
    INNER JOIN Production.Product p  
      ON pv.ProductID = p.ProductID   
    ORDER BY v.Name ASC;  
GO

  5. On the File menu, select New Query.

  6. Copy and paste the following example into the query editor. The example modifies the uspVendorAllInfo procedure. The EXECUTE AS CALLER clause is removed and the body of the procedure is modified to return only those vendors that supply the specified product. The LEFT and CASE functions customize the appearance of the result set.

    Important

    Dropping and recreating an existing stored procedure removes permissions that have been explicitly granted to the stored procedure. Use ALTER to modify the existing stored procedure instead.

    ALTER PROCEDURE Purchasing.uspVendorAllInfo  
    @Product varchar(25)   
AS  
    SET NOCOUNT ON;  
    SELECT LEFT(v.Name, 25) AS Vendor, LEFT(p.Name, 25) AS 'Product name',   
    'Rating' = CASE v.CreditRating   
        WHEN 1 THEN 'Superior'  
        WHEN 2 THEN 'Excellent'  
        WHEN 3 THEN 'Above average'  
        WHEN 4 THEN 'Average'  
        WHEN 5 THEN 'Below average'  
        ELSE 'No rating'  
        END  
    , Availability = CASE v.ActiveFlag  
        WHEN 1 THEN 'Yes'  
        ELSE 'No'  
        END  
    FROM Purchasing.Vendor AS v   
    INNER JOIN Purchasing.ProductVendor AS pv  
      ON v.BusinessEntityID = pv.BusinessEntityID   
    INNER JOIN Production.Product AS p   
      ON pv.ProductID = p.ProductID   
    WHERE p.Name LIKE @Product  
    ORDER BY v.Name ASC;  
GO

  7. To save the modifications to the procedure definition, on the Query menu, select Execute.

  8. To save the updated procedure definition as a Transact-SQL script, on the File menu, select Save As. Accept the file name or replace it with a new name, and then select Save.

  9. To run the modified stored procedure, execute the following example.

    EXEC Purchasing.uspVendorAllInfo N'LL Crankarm';  
GO

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