As noted by another poster here, Russia (USSR actually) attacked Poland twice in the 20th century.
The first time was in 1919. Lenin saw Poland as a bridge for exporting communism to western Europe. The second time was in 1939. Stalin saw Poland as a buffer against the expanding Third Reich.
I can see no reason for Putin to want Poland today. Why would he risk so much just to add a restless region to the map of Russia?
That's how I see it. That being said, still, Poland must beef up her military, and always be vigilant.
Poland invaded Russia in 1920 during the Russian civil war. They were pushed back to Warsaw.