Modify a Stored Procedure

Applies to: SQL Server (all supported versions) Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

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

Limitations and restrictions

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. 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 AdventureWorks2019 database.

  3. On the File menu, select New Query.

  4. Copy and paste the following example into the query editor. The example creates the 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.

    IF OBJECT_ID ( 'Purchasing.uspVendorAllInfo', 'P' ) IS NOT NULL   
        DROP PROCEDURE Purchasing.uspVendorAllInfo;  
    GO  
    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   
    

    Important

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

  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.

    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  
    

Next steps