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Add BitmapTableScanSetup(), a helper which contains all of the code that must be done on every scan of the table in a bitmap table scan. This includes scanning the index, building the bitmap, and setting up the scan descriptors. Pushing this setup into a helper function makes BitmapHeapNext() more readable. Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com> Discussion: https://postgr.es/m/CAN55FZ1vXu%2BZdT0_MM-i1vbTdfHHf0KR3cK6R5gs6dNNNpyrJw%40mail.gmail.com