com.facebook.presto.spi.plan

Class FilterNode

java.lang.Object

com.facebook.presto.spi.plan.PlanNode

com.facebook.presto.spi.plan.FilterNode

@Immutable
public final class FilterNode
extends PlanNode

Constructor Summary

Constructors

Constructor and Description
FilterNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, Optional<PlanNode> statsEquivalentPlanNode, PlanNode source, RowExpression predicate)
FilterNode(Optional<SourceLocation> sourceLocation, PlanNodeId id, PlanNode source, RowExpression predicate)

Method Summary

Modifier and Type	Method and Description
<R,C> R	accept(PlanVisitor<R,C> visitor, C context) A visitor pattern interface to operate on IR.
PlanNode	assignStatsEquivalentPlanNode(Optional<PlanNode> statsEquivalentPlanNode) Assigns statsEquivalentPlanNode to the plan node
LogicalProperties	computeLogicalProperties(LogicalPropertiesProvider logicalPropertiesProvider) Logical properties are a function of source properties and the operation performed by the plan node
boolean	equals(Object o)
List<VariableReferenceExpression>	getOutputVariables() The output from the upstream PlanNodes.
RowExpression	getPredicate() Get the predicate (a RowExpression of boolean type) of the FilterNode.
PlanNode	getSource() FilterNode only expects a single upstream PlanNode.
List<PlanNode>	getSources() Get the upstream PlanNodes (i.e., children) of the current PlanNode.
int	hashCode()
PlanNode	replaceChildren(List<PlanNode> newChildren) Alter the upstream PlanNodes of the current PlanNode.

Methods inherited from class com.facebook.presto.spi.plan.PlanNode

getId, getSourceLocation, getStatsEquivalentPlanNode

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterNode

public FilterNode(Optional<SourceLocation> sourceLocation,
                  PlanNodeId id,
                  PlanNode source,
                  RowExpression predicate)

FilterNode

public FilterNode(Optional<SourceLocation> sourceLocation,
                  PlanNodeId id,
                  Optional<PlanNode> statsEquivalentPlanNode,
                  PlanNode source,
                  RowExpression predicate)

Method Detail

getPredicate

public RowExpression getPredicate()

Get the predicate (a RowExpression of boolean type) of the FilterNode. It serves as the criteria to determine whether the incoming rows should be filtered out or not.

getSource

public PlanNode getSource()

FilterNode only expects a single upstream PlanNode.

getOutputVariables

public List<VariableReferenceExpression> getOutputVariables()

Description copied from class: PlanNode

The output from the upstream PlanNodes. It should serve as the input for the current PlanNode.

Specified by:

getOutputVariables in class PlanNode

getSources

public List<PlanNode> getSources()

Description copied from class: PlanNode

Get the upstream PlanNodes (i.e., children) of the current PlanNode.

Specified by:

getSources in class PlanNode

accept

public <R,C> R accept(PlanVisitor<R,C> visitor,
                      C context)

Description copied from class: PlanNode

A visitor pattern interface to operate on IR.

Overrides:

accept in class PlanNode

assignStatsEquivalentPlanNode

public PlanNode assignStatsEquivalentPlanNode(Optional<PlanNode> statsEquivalentPlanNode)

Description copied from class: PlanNode

Assigns statsEquivalentPlanNode to the plan node

Specified by:

assignStatsEquivalentPlanNode in class PlanNode

replaceChildren

public PlanNode replaceChildren(List<PlanNode> newChildren)

Description copied from class: PlanNode

Alter the upstream PlanNodes of the current PlanNode.

Specified by:

replaceChildren in class PlanNode

computeLogicalProperties

public LogicalProperties computeLogicalProperties(LogicalPropertiesProvider logicalPropertiesProvider)

Description copied from class: PlanNode

Logical properties are a function of source properties and the operation performed by the plan node

Overrides:

computeLogicalProperties in class PlanNode

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object