net.sf.farrago.fennel.rel
Class FennelWindowRel.Partition

java.lang.Object
  net.sf.farrago.fennel.rel.FennelWindowRel.Partition

Enclosing class:

FennelWindowRel

public static class FennelWindowRel.Partition
extends Object

A Partition is a collection of windowed aggregate expressions which belong to the same FennelWindowRel.Window and have the same partitioning keys.

Field Summary

(package private) List<FennelWindowRel.RexWinAggCall>	overList Array of FennelWindowRel.RexWinAggCall objects, each of which is a call to a SqlAggFunction.
(package private) Integer[]	partitionKeys The ordinals of the input columns which uniquely identify rows in this partition.

Constructor Summary

FennelWindowRel.Partition(Integer[] partitionKeys)

Method Summary

FennelWindowRel.RexWinAggCall	addOver(RelDataType type, SqlAggFunction operator, RexNode[] operands, RexProgramBuilder programBuilder)
private void	computeDigest(StringBuilder buf)
boolean	equals(Object obj)
List<FennelWindowRel.RexWinAggCall>	getOvers()

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

overList

final List<FennelWindowRel.RexWinAggCall> overList

Array of FennelWindowRel.RexWinAggCall objects, each of which is a call to a SqlAggFunction.

partitionKeys

final Integer[] partitionKeys

The ordinals of the input columns which uniquely identify rows in this partition. May be empty. Must not be null.

Constructor Detail

FennelWindowRel.Partition

FennelWindowRel.Partition(Integer[] partitionKeys)

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

computeDigest

private void computeDigest(StringBuilder buf)

addOver

public FennelWindowRel.RexWinAggCall addOver(RelDataType type,
                                             SqlAggFunction operator,
                                             RexNode[] operands,
                                             RexProgramBuilder programBuilder)

getOvers

public List<FennelWindowRel.RexWinAggCall> getOvers()