sql server - T-SQL error handling with try catch rollback, error rows were deleted -

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i have following construct. noticed erroneous rows error number > 0 being deleted @ end of while loop. don't understand have gone wrong error catching. need second commit in catch section commit update of error number? 

while @@fetch_status = 0   begin try     begin transaction          [...insert table here...]         set @countrec = @countrec + @@rowcount       update alarmtable         set success = 0       recno = @recno      commit transaction     end try   begin catch     if @@trancount > 0 rollback transaction      select @error = error_number()          , @errormsg = error_message()        update alarmtable        set success = @error      recno = @recno      if @@trancount > 0 commit transaction    end catch    fetch next listofrecords          @recno, @alarmcontent  end /* while */  close listofrecords  deallocate listofrecords   delete alarmtable     success = 0

removed commit transaction , error entries don't removed anymore. @kevchadders.


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