Package org.apache.calcite.adapter.enumerable

Interface WinAggFrameResultContext

All Superinterfaces:

WinAggFrameContext

All Known Subinterfaces:

WinAggAddContext, WinAggResultContext

All Known Implementing Classes:

WinAggAddContextImpl, WinAggResultContextImpl

public interface WinAggFrameResultContext
extends WinAggFrameContext

Provides information on the current window when computing the result of the aggregation.

Method Summary

Modifier and Type	Method	Description
Expression	compareRows(Expression a, Expression b)	Compares two rows given by absolute positions according to the order collation of the current window.
Expression	computeIndex(Expression offset, WinAggImplementor.SeekType seekType)	Converts absolute index position of the given relative position.
Expression	rowInFrame(Expression rowIndex)	Returns boolean the expression that checks if the given index is in the frame bounds.
Expression	rowInPartition(Expression rowIndex)	Returns boolean the expression that checks if the given index is in the partition bounds.
RexToLixTranslator	rowTranslator(Expression rowIndex)	Returns row translator for given absolute row position.

Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggFrameContext

endIndex, getFrameRowCount, getPartitionRowCount, hasRows, index, startIndex

Method Detail

computeIndex

Expression computeIndex(Expression offset,
                        WinAggImplementor.SeekType seekType)

Converts absolute index position of the given relative position.

Parameters:

offset - offset of the requested row

seekType - the type of offset (start of window, end of window, etc)

Returns:

absolute position of the requested row

rowInFrame

Expression rowInFrame(Expression rowIndex)

Returns boolean the expression that checks if the given index is in the frame bounds.

Parameters:

rowIndex - index if the row to check

Returns:

expression that validates frame bounds for the given index

rowInPartition

Expression rowInPartition(Expression rowIndex)

Returns boolean the expression that checks if the given index is in the partition bounds.

Parameters:

rowIndex - index if the row to check

Returns:

expression that validates partition bounds for the given index

rowTranslator

RexToLixTranslator rowTranslator(Expression rowIndex)

Returns row translator for given absolute row position.

Parameters:

rowIndex - absolute index of the row.

Returns:

translator for the requested row

compareRows

Expression compareRows(Expression a,
                       Expression b)

Compares two rows given by absolute positions according to the order collation of the current window.

Parameters:

a - absolute index of the first row

b - absolute index of the second row

Returns:

result of comparison as as in Comparable.compareTo(T)