Package org.apache.calcite.rel

Class RelNodes

java.lang.Object

org.apache.calcite.rel.RelNodes

public class RelNodes
extends Object

Utilities concerning relational expressions.

Field Summary

Fields

Modifier and Type	Field	Description
static final Comparator<RelNode>	COMPARATOR	Comparator that provides an arbitrary but stable ordering to RelNodes.
static final com.google.common.collect.Ordering<RelNode>	ORDERING	Ordering for RelNodes.

Method Summary

Modifier and Type	Method	Description
static int	compareRels(RelNode[] rels0, RelNode[] rels1)	Compares arrays of RelNode.
static boolean	contains(RelNode rel, Predicate<AggregateCall> aggPredicate, RexUtil.RexFinder finder)	Returns whether a tree of RelNodes contains a match for a RexNode finder.
static void	findRex(RelNode rel, RexUtil.RexFinder finder, Predicate<AggregateCall> aggPredicate, BiConsumer<RelNode,@Nullable RexNode> consumer)	Searches for expressions in a tree of RelNodes.

Methods inherited from class java.lang.Object

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

Field Details

COMPARATOR

public static final Comparator<RelNode> COMPARATOR

Comparator that provides an arbitrary but stable ordering to RelNodes.

ORDERING

public static final com.google.common.collect.Ordering<RelNode> ORDERING

Ordering for RelNodes.

Method Details

compareRels

public static int compareRels(RelNode[] rels0,
 RelNode[] rels1)

Compares arrays of RelNode.

contains

public static boolean contains(RelNode rel,
 Predicate<AggregateCall> aggPredicate,
 RexUtil.RexFinder finder)

Returns whether a tree of RelNodes contains a match for a RexNode finder.

findRex

public static void findRex(RelNode rel,
 RexUtil.RexFinder finder,
 Predicate<AggregateCall> aggPredicate,
 BiConsumer<RelNode,@Nullable RexNode> consumer)

Searches for expressions in a tree of RelNodes.