org.apache.calcite.rex

Class RexSubQuery

java.lang.Object

org.apache.calcite.rex.RexNode

org.apache.calcite.rex.RexCall

org.apache.calcite.rex.RexSubQuery

public class RexSubQuery
extends RexCall

Scalar expression that represents an IN, EXISTS or scalar sub-query.

Field Summary

Fields

Modifier and Type	Field and Description
RelNode	rel

Fields inherited from class org.apache.calcite.rex.RexCall

hash, nodeCount, op, operands, type

Fields inherited from class org.apache.calcite.rex.RexNode

digest

Method Summary

Modifier and Type	Method and Description
<R,P> R	accept(RexBiVisitor<R,P> visitor, P arg) Accepts a visitor with a payload, dispatching to the right overloaded RexBiVisitor.visitInputRef(RexInputRef, Object) visitXxx} method.
<R> R	accept(RexVisitor<R> visitor) Accepts a visitor, dispatching to the right overloaded visitXxx method.
static RexSubQuery	array(RelNode rel) Creates an ARRAY sub-query.
RexSubQuery	clone(RelDataType type, List<RexNode> operands) Creates a new call to the same operator with different operands.
RexSubQuery	clone(RelNode rel)
protected String	computeDigest(boolean withType)
boolean	equals(@Nullable Object obj)
static RexSubQuery	exists(RelNode rel) Creates an EXISTS sub-query.
int	hashCode()
static RexSubQuery	in(RelNode rel, com.google.common.collect.ImmutableList<RexNode> nodes) Creates an IN sub-query.
static RexSubQuery	map(RelNode rel) Creates a MAP sub-query.
static RexSubQuery	multiset(RelNode rel) Creates a MULTISET sub-query.
static RexSubQuery	scalar(RelNode rel) Creates a scalar sub-query.
static RexSubQuery	some(RelNode rel, com.google.common.collect.ImmutableList<RexNode> nodes, SqlQuantifyOperator op) Creates a SOME sub-query.
static RexSubQuery	unique(RelNode rel) Creates an UNIQUE sub-query.

Methods inherited from class org.apache.calcite.rex.RexCall

appendOperands, getKind, getOperands, getOperator, getType, isAlwaysFalse, isAlwaysTrue, nodeCount, toString

Methods inherited from class org.apache.calcite.rex.RexNode

isA, isA

Methods inherited from class java.lang.Object

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

Field Detail

rel

public final RelNode rel

Method Detail

in

public static RexSubQuery in(RelNode rel,
                             com.google.common.collect.ImmutableList<RexNode> nodes)

Creates an IN sub-query.

some

public static RexSubQuery some(RelNode rel,
                               com.google.common.collect.ImmutableList<RexNode> nodes,
                               SqlQuantifyOperator op)

Creates a SOME sub-query.

There is no ALL. For x comparison ALL (sub-query) use instead NOT (x inverse-comparison SOME (sub-query)). If comparison is > then negated-comparison is <=, and so forth.

Also =SOME is rewritten into IN

exists

public static RexSubQuery exists(RelNode rel)

Creates an EXISTS sub-query.

unique

public static RexSubQuery unique(RelNode rel)

Creates an UNIQUE sub-query.

scalar

public static RexSubQuery scalar(RelNode rel)

Creates a scalar sub-query.

array

public static RexSubQuery array(RelNode rel)

Creates an ARRAY sub-query.

multiset

public static RexSubQuery multiset(RelNode rel)

Creates a MULTISET sub-query.

map

public static RexSubQuery map(RelNode rel)

Creates a MAP sub-query.

accept

public <R> R accept(RexVisitor<R> visitor)

Description copied from class: RexNode

Accepts a visitor, dispatching to the right overloaded visitXxx method.

Also see RexUtil.apply(RexVisitor, java.util.List, RexNode), which applies a visitor to several expressions simultaneously.

Overrides:

accept in class RexCall

accept

public <R,P> R accept(RexBiVisitor<R,P> visitor,
                      P arg)

Description copied from class: RexNode

Accepts a visitor with a payload, dispatching to the right overloaded RexBiVisitor.visitInputRef(RexInputRef, Object) visitXxx} method.

Overrides:

accept in class RexCall

computeDigest

protected String computeDigest(boolean withType)

Overrides:

computeDigest in class RexCall

clone

public RexSubQuery clone(RelDataType type,
                         List<RexNode> operands)

Description copied from class: RexCall

Creates a new call to the same operator with different operands.

Overrides:

clone in class RexCall

Parameters:

type - Return type

operands - Operands to call

Returns:

New call

clone

public RexSubQuery clone(RelNode rel)

equals

public boolean equals(@Nullable Object obj)

Description copied from class: RexNode

Every node must implement RexNode.equals(java.lang.Object) based on its content

Overrides:

equals in class RexCall

hashCode

public int hashCode()

Description copied from class: RexNode

Every node must implement RexNode.hashCode() consistent with RexNode.equals(java.lang.Object)

Overrides:

hashCode in class RexCall