I have created a stored procedure that will drop a table if it exists in a database. When running the stored procedure with EXEC, I am getting the following error:
Msg 203, Level 16, State 2, Procedure sp_DropIfExists, Line 13 The name 'IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'table_name') AND type = (N'U')) DROP TABLE [table_name]' is not a valid identifier.
However if i copy and paste the T-SQL that is generated into management studio, it seems to be running fine. Can someone explain why this is not valid? The fix would be nice, but I am really after the Why primarily, The How would be nice to though! Thanks in advance.
ALTER PROCEDURE [dbo].[sp_DropIfExists](@tableName VARCHAR(255)) AS BEGIN SET NOCOUNT ON; DECLARE @SQL VARCHAR(MAX); SET @SQL = 'IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N''' + @tableName + ''') AND type = (N''U'')) DROP TABLE [' + @tableName + ']' PRINT @SQL; EXEC @SQL; END