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POT-SQL: Stop processing rest of the query
 

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  1. POT-SQL: Stop processing rest of the query
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    <p>I wonder if I could stop processing the rest of the query on a specific condition.</p> <p><strong>Scenario</strong></p> <pre><code>IF NOT EXISTS (SELECT * FROM [dbo].[Updates] WHERE RevisionNumber='12.2457.2') BEGIN IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[TestProcedure]') AND type in (N'P', N'PC')) DROP PROCEDURE [dbo].[TestProcedure] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE [dbo].[TestProcedure] AS BEGIN PRINT 'Test'; END GO INSERT [dbo].[Updates] SELECT '12.2457.2' END </code></pre> <p>The above query will not work because a line following "GO" is treated as a new query. We release updates every day and want simplicity of installing updates.</p> <p>I am searching for something like "RETURN" statement. It works, but not with "GO"s.</p> <pre><code>IF EXISTS (SELECT * FROM [dbo].[Updates] WHERE RevisionNumber='12.2457.2') BEGIN PRINT 'The update ''12.2457.2'' was already installed.' RETURN END GO IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[TestProcedure]') AND type in (N'P', N'PC')) DROP PROCEDURE [dbo].[TestProcedure] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE [dbo].[TestProcedure] AS BEGIN PRINT 'Test'; END GO INSERT [dbo].[Updates] SELECT '12.2457.2' GO </code></pre> <p><strong>Workaround</strong></p> <pre><code>BEGIN TRANSACTION GO IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[TestProcedure]') AND type in (N'P', N'PC')) DROP PROCEDURE [dbo].[TestProcedure] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE [dbo].[TestProcedure] AS BEGIN PRINT 'Test'; END GO IF EXISTS(SELECT TOP 1 1 FROM [dbo].[Updates] WHERE RevisionNumber='12.2457.2') BEGIN ROLLBACK TRANSACTION PRINT 'The update was already present in the database. The transaction was rolled back.' END ELSE BEGIN INSERT [dbo].[Updates] SELECT '12.2457.2' COMMIT TRANSACTION PRINT 'The update was sucessfully installed.' END </code></pre> <p>What I want is an idea to stop the execution of the rest of the lines, equivalent to "RETURN/END" keyword in Visual Basic. Please help!</p>
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