Need help to debug T-SQL stored procedure that has sql scripts stored in a table

Question

In this stored procedure, I read from a third party vendor table named M_SopInsert.

SQLScript is the column name and every record in this table contains a SQL query that does an UPDATE, INSERT or DELETE.

I can see the actual script when I debug it using Select (commented below). But the script itself doesn't execute and I don't see any errors.

I tried hardcoding an UPDATE statement below and it works fine.

What could be the issue here?

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
declare @sopScript nvarchar(1000)

select SQLScript into #ControlTbl from  M_SopInsert 
where soptype = @I_vSOPTYPE and sopnumbe = @I_vSOPNUMBE and lnitmseq = @I_vLNITMSEQ

while exists (select * from #ControlTbl)
begin

   select top 1 @sopScript = SQLScript
   from #ControlTbl

   --exec executesql @sopScript = SQLScript 
   --select @sopScript
   --EXEC sp_executesql @sopScript;
   --EXEC sp_executesql "update SOPQty set QTYORDER = '17.89' where LNIT = '16'"
exec sp_executesql @sopScript = SQLScript
   delete from #ControlTbl where SQLScript = @sopScript

end
drop table #ControlTbl
return (@O_iErrorState)

Answer 1

I replaced "exec sp_executesql @sopScript = SQLScript" with "exec sp_executesql @sopScript" and it worked.. I don't know what difference it would make.

Answer 2

You don't see any errors because you have an empty catch. This is like setting your alarm clock and then unplugging it. The error you'll probably get is that you can't pass a VARCHAR string to sp_executesql - it needs to be NVARCHAR. Try:

declare @sopScript Nvarchar(1000)
-------------------^