How to Avoid Errors When Creating Stored Procedures that May Already Exist?

Verifying Stored Procedure Existence Before Creation

When deploying database scripts involving stored procedure creation, it's crucial to handle scenarios where the procedures already exist. A common approach is to rely on DROP PROCEDURE and CREATE PROCEDURE statements sequentially. However, this method can be undesirable for various reasons.

To avoid this issue, a more elegant approach involves checking for the procedure's existence and acting accordingly:

IF NOT EXISTS (SELECT * FROM sys.objects WHERE type = 'P' AND OBJECT_ID = OBJECT_ID('dbo.MyProc'))
   exec('CREATE PROCEDURE [dbo].[MyProc] AS BEGIN SET NOCOUNT ON; END')
GO

ALTER PROCEDURE [dbo].[MyProc] 
AS
  ....

This code ensures that if the procedure MyProc doesn't exist, it's created using the CREATE PROCEDURE statement. If it does exist, it's altered with the updated code using the ALTER PROCEDURE statement.

By utilizing this method, you can gracefully handle stored procedure existence scenarios without the need for repetitive dropping and recreating.

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