Right. You'll notice this in the Pachelbel rant; he very specifically only sings "da, da-da-da, da-da da-da-da-da-da-da--" (the first half of the violin theme)

Right. You'll notice this in the Pachelbel rant; he very specifically only sings "da, da-da-da, da-da da-da-da-da-da-da--" (the first half of the violin theme) before abruptly cutting off because with this progression you essentially only get the "first half" of the Canon.