Processing of data retrieval from a search request can result in a message row being displayed.
When the processing of data retrieval is slower than the set display time, a message row is displayed. By default, the time period after which a message row is displayed is seven seconds. Once the requested data is available, the actual result set is displayed, replacing the message row. Once Cancel is chosen the processing request is stopped and you see a new message row with an option to retry the request.
When the requested result set size exceeds the threshold display limit, a message row is displayed. The default threshold display limit for rows is 500. Hovering your mouse over the message row provides the number of rows. Selecting Expand allows you to see the entire result set.
If a result set cannot be returned, a message row is displayed indicating an error has occurred. Hovering your mouse over the message row provides the reason for the exception.