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Ensuring Stored Procedure Existence before Creation
In database management, creating stored procedures on client databases is a common task. However, ensuring their absence before creation can be challenging due to T-SQL syntax limitations.
Code Approach
The question highlights the need to check for existing stored procedures before executing a creation statement. A workaround suggested by some is to drop any existing ones before creating, but this is not preferred.
A more elegant solution is to use the IF NOT EXISTS syntax:
IF NOT EXISTS (SELECT * FROM sys.objects WHERE type = 'P' AND name = 'MyProc') EXEC('CREATE PROCEDURE [dbo].[MyProc] AS BEGIN SET NOCOUNT ON; END') GO ALTER PROCEDURE [dbo].[MyProc] AS ...
This script checks if the stored procedure MyProc already exists in the database. If not, it creates it with a placeholder statement. If it does exist, it skips creation and proceeds to the ALTER PROCEDURE statement, which updates the existing procedure.
Benefits
This approach:
Additional Considerations
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