GO causes error when used in EXEC: “Incorrect syntax near 'GO'.”

Question

I\'ve created this stored procedure which dynamically creates the same trigger for all my tables:

USE [MyDatabase]
GO

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIE         


        

Answer 1

You must execute each part of command in single exec() command.

Try this:

CREATE PROCEDURE sp_CreateDataChangedTrigger
    -- Add the parameters for the stored procedure here
    @TableName varchar(255), 
    @TableKey  varchar(255),
    @Debug     bit=1
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

     DECLARE @SQLPart1 varchar(max);
     DECLARE @SQLPart2 varchar(max);

     SET @SQLPart1 = '
--Drop Trigger
BEGIN TRY
     DROP TRIGGER [dbo].[TR_' + @TableName + '_Audit]
END TRY
BEGIN CATCH
END CATCH
'

SET @SQLPart2 = '
--Create Trigger
CREATE TRIGGER [dbo].[TR_' + @TableName + '_Audit]
     ON [dbo].[' + @TableName + ']
     AFTER INSERT, UPDATE, DELETE
AS
BEGIN
     SET NOCOUNT ON
     DECLARE @event_type [char]

     --Get Event Type
     IF EXISTS(SELECT * FROM INSERTED)
     IF EXISTS(SELECT * FROM DELETED)
          SELECT @event_type = ''U''
     ELSE
          SELECT @event_type = ''I''
     ELSE
     IF EXISTS(SELECT * FROM deleted)
          SELECT @event_type = ''D''
     ELSE
     --no rows affected - cannot determine event
          SELECT @event_type = ''K''

     IF @event_type IN (''I'',''U'') BEGIN
          DECLARE @CurrentUserID INT;
          SELECT  @CurrentUserID = u.UserID
          FROM    [dbo].[dim_Users] u
          WHERE   u.[Username] = dbo.udfUserName()

          UPDATE  t
          SET     DateModified = GETDATE(),
                  WhoModifiedID = @CurrentUserID
          FROM    INSERTED e
          JOIN    [dbo].[' + @TableName + '] t ON e.[' + @TableKey + '] = t.[' + @TableKey + ']
     END

     IF @event_type = ''D'' BEGIN
          no_op:  --Nothing for now
     END
END
';

     IF @Debug=1 BEGIN
          set nocount on;
          print @SQLPart1;
          print @SQLPart2;
     END
     ELSE BEGIN
          exec(@SQLPart1);
          exec(@SQLPart2);
     END    
END
GO