WindowSpecificationExpression
constructor(partitionBy: List<ScalarExpression<*>> = emptyList(), orderBy: List<OrderByExpression> = emptyList(), frameUnit: WindowFrameUnitType? = null, frameStart: WindowFrameBoundExpression? = null, frameEnd: WindowFrameBoundExpression? = null, isLeafNode: Boolean = false, extraProperties: Map<String, Any> = emptyMap())(source)
