Package org.apache.calcite.rex

Class RexFieldCollation

java.lang.Object

org.apache.calcite.util.Pair<RexNode,com.google.common.collect.ImmutableSet<SqlKind>>

org.apache.calcite.rex.RexFieldCollation

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Pair<RexNode,com.google.common.collect.ImmutableSet<SqlKind>>>, java.util.Map.Entry<RexNode,com.google.common.collect.ImmutableSet<SqlKind>>

public class RexFieldCollation
extends Pair<RexNode,com.google.common.collect.ImmutableSet<SqlKind>>

Expression combined with sort flags (DESCENDING, NULLS LAST).

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	RexFieldCollation.Initializer	Helper, used during initialization, that builds a canonizing map from sets of SqlKind to immutable sets of SqlKind.

Field Summary

Fields

Modifier and Type	Field	Description
private static com.google.common.collect.ImmutableMap<java.util.Set<SqlKind>,com.google.common.collect.ImmutableSet<SqlKind>>	KINDS	Canonical map of all combinations of SqlKind values that can ever occur.

Fields inherited from class org.apache.calcite.util.Pair

left, right

Constructor Summary

Constructors

Constructor	Description
RexFieldCollation(RexNode left, java.util.Set<SqlKind> right)

Method Summary

Modifier and Type	Method	Description
RelFieldCollation.Direction	getDirection()
RelFieldCollation.NullDirection	getNullDirection()
java.lang.String	toString()

Methods inherited from class org.apache.calcite.util.Pair

adjacents, compareTo, equals, firstAnd, getKey, getValue, hashCode, left, left, of, of, right, right, setValue, toMap, zip, zip, zip, zip

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

KINDS

private static final com.google.common.collect.ImmutableMap<java.util.Set<SqlKind>,com.google.common.collect.ImmutableSet<SqlKind>> KINDS

Canonical map of all combinations of SqlKind values that can ever occur. We use a canonical map to save a bit of memory. Because the sets are EnumSets they have predictable order for toString().

Constructor Detail

RexFieldCollation

public RexFieldCollation(RexNode left,
                         java.util.Set<SqlKind> right)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class Pair<RexNode,com.google.common.collect.ImmutableSet<SqlKind>>

getDirection

public RelFieldCollation.Direction getDirection()

getNullDirection

public RelFieldCollation.NullDirection getNullDirection()