Package org.apache.calcite.materialize

Class LatticeNode

java.lang.Object

org.apache.calcite.materialize.LatticeNode

Direct Known Subclasses:

LatticeChildNode, LatticeRootNode

public abstract class LatticeNode
extends java.lang.Object

Source relation of a lattice.

Relations form a tree; all relations except the root relation (the fact table) have precisely one parent and an equi-join condition on one or more pairs of columns linking to it.

Field Summary

Fields

Modifier and Type	Field	Description
java.lang.String	alias
private com.google.common.collect.ImmutableList<LatticeChildNode>	children
java.lang.String	digest
(package private) int	endCol
(package private) int	startCol
LatticeTable	table

Constructor Summary

Constructors

Constructor	Description
LatticeNode(LatticeSpace space, LatticeNode parent, MutableNode mutableNode)	Creates a LatticeNode.

Method Summary

Modifier and Type	Method	Description
(package private) void	createPathsRecurse(LatticeSpace space, java.util.List<Step> steps, java.util.List<Path> paths)
(package private) void	flattenTo(com.google.common.collect.ImmutableList.Builder<LatticeNode> builder)
RelOptTable	relOptTable()
java.lang.String	toString()
(package private) abstract void	use(java.util.List<LatticeNode> usedNodes)

Methods inherited from class java.lang.Object

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

Field Detail

table

public final LatticeTable table

startCol

final int startCol

endCol

final int endCol

alias

public final java.lang.String alias

children

private final com.google.common.collect.ImmutableList<LatticeChildNode> children

digest

public final java.lang.String digest

Constructor Detail

LatticeNode

LatticeNode(LatticeSpace space,
            LatticeNode parent,
            MutableNode mutableNode)

Creates a LatticeNode.

The parent and mutableNode arguments are used only during construction.

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

relOptTable

public RelOptTable relOptTable()

use

abstract void use(java.util.List<LatticeNode> usedNodes)

flattenTo

void flattenTo(com.google.common.collect.ImmutableList.Builder<LatticeNode> builder)

createPathsRecurse

void createPathsRecurse(LatticeSpace space,
                        java.util.List<Step> steps,
                        java.util.List<Path> paths)