BITMAP_BIT_POSITION to construct the one-to-one mapping between a number and a bit position.
expr is of type
NUMBER. It is the absolute bit position in the bitmap.
BITMAP_BIT_POSITION returns a
NUMBER, the relative bit position.
expr is NULL, the function returns NULL.
expr is not an integer, you will see the following error message:
Invalid value has been passed to a BITMAP COUNT DISTINCT related operator.