org.apache.calcite.rex

Class RexOver

java.lang.Object

org.apache.calcite.rex.RexNode

org.apache.calcite.rex.RexCall

org.apache.calcite.rex.RexOver

public class RexOver
extends RexCall

Call to an aggregate function over a window.

Field Summary

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.
RexCall	clone(RelDataType type, List<RexNode> operands) Creates a new call to the same operator with different operands.
protected String	computeDigest(boolean withType)
static boolean	containsOver(List<? extends RexNode> exprs, @Nullable RexNode condition) Returns whether an expression list contains an OVER clause.
static boolean	containsOver(RexNode expr) Returns whether an expression contains an OVER clause.
static boolean	containsOver(RexProgram program) Returns whether a program contains an OVER clause.
boolean	equals(@Nullable Object o)
SqlAggFunction	getAggOperator() Returns the aggregate operator for this expression.
RexWindow	getWindow()
int	hashCode()
boolean	ignoreNulls()
boolean	isDistinct()
int	nodeCount() Returns the number of nodes in this expression.

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

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

Method Detail

getAggOperator

public SqlAggFunction getAggOperator()

Returns the aggregate operator for this expression.

getWindow

public RexWindow getWindow()

isDistinct

public boolean isDistinct()

ignoreNulls

public boolean ignoreNulls()

computeDigest

protected String computeDigest(boolean withType)

Overrides:

computeDigest in class RexCall

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

nodeCount

public int nodeCount()

Description copied from class: RexNode

Returns the number of nodes in this expression.

Leaf nodes, such as RexInputRef or RexLiteral, have a count of 1. Calls have a count of 1 plus the sum of their operands.

Node count is a measure of expression complexity that is used by some planner rules to prevent deeply nested expressions.

Overrides:

nodeCount in class RexCall

containsOver

public static boolean containsOver(RexNode expr)

Returns whether an expression contains an OVER clause.

containsOver

public static boolean containsOver(RexProgram program)

Returns whether a program contains an OVER clause.

containsOver

public static boolean containsOver(List<? extends RexNode> exprs,
                                   @Nullable RexNode condition)

Returns whether an expression list contains an OVER clause.

clone

public RexCall 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

equals

public boolean equals(@Nullable Object o)

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