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3a5bbe4cbe
Altered the range specification for window functions to allow for two of the same PRECEDING or FOLLOWING keywords in a range by allowing for the left side of the range to be positive and for the right to be negative, e.g. (1, 3) is "1 FOLLOWING AND 3 FOLLOWING". Change-Id: I7d3a6c641151bb49219104968d18dac2266f3db8 Fixes: #4053