Heat oven to 350°F. Line a 9×13-inch pan with parchment, leaving overhang.
Whisk flour, brown sugar, and salt in a bowl. Stir in melted butter and vanilla until a soft dough forms; fold in pecans.
Press crust evenly into the pan and dock a few times with a fork. Bake 10 minutes.
Beat cream cheese and granulated sugar until smooth and fluffy, about 2 minutes.
Blend in sour cream, vanilla, and salt. Mix in beaten eggs on low just until combined.
Spread cheesecake filling over the warm crust and smooth the top.
Stir topping: combine pecans, brown sugar, corn syrup, melted butter, cream, vanilla, and salt until glossy and well coated.
Spoon the pecan mixture over the filling and gently spread to cover without tearing the cheesecake layer.
Bake 30–35 minutes, until the edges are set and the center has a slight jiggle.
Cool in the pan on a rack for 1 hour, then refrigerate at least 3 hours until firm.
Lift out using the parchment, slice into bars, and serve.