GetOffsetTypeFromOrderColType returns the correct offset type for the given order column type for a window frame in RANGE mode with offsets.

NewCountRowsOperator creates a new Operator that computes the count_rows aggregate window function.

NewFirstValueOperator creates a new Operator that computes window function firstValue.

NewLagOperator creates a new Operator that computes window function lag.

NewLastValueOperator creates a new Operator that computes window function lastValue.

NewLeadOperator creates a new Operator that computes window function lead.

NewNthValueOperator creates a new Operator that computes window function nthValue.

NewNTileOperator creates a new Operator that computes window function NTILE.

NewRankOperator creates a new Operator that computes window functions RANK or DENSE_RANK (depending on the passed in windowFn).

NewRelativeRankOperator creates a new Operator that computes window functions PERCENT_RANK or CUME_DIST (depending on the passed in windowFn).

NewRowNumberOperator creates a new Operator that computes window function ROW_NUMBER.

NewWindowAggregatorOperator creates a new Operator that computes aggregate window functions.

NewWindowPeerGrouper creates a new Operator that puts 'true' in outputColIdx'th column (which is appended if needed) for every tuple that is the first within its peer group.

NewWindowSortingPartitioner creates a new colexecop.Operator that orders input first based on the partitionIdxs columns and second on ordCols (i.e.

NormalizeWindowFrame returns a frame that is identical to the given one except that the default values have been explicitly set (where before they may have been nil).

WindowFnArgCasts returns a list of types to which the given window function arguments should be cast.

WindowFnNeedsPeersInfo returns whether a window function pays attention to the concept of "peers" during its computation ("peers" are tuples within the same partition - from PARTITION BY clause - that are not distinct on the columns in ORDER BY clause).

WindowFrameCanShrink returns true if a sliding window aggregate function over the given frame may need to call Remove, which is the case when the frame for a given row may not include all rows that were part of the previous frame.

WindowArgs extracts common arguments to window operators.