Package org.apache.flink.optimizer.dag

Class AbstractPartialSolutionNode

    • Constructor Detail

      • AbstractPartialSolutionNode

        protected AbstractPartialSolutionNode​(org.apache.flink.api.common.operators.Operator<?> contract)

    • Method Detail

      • copyEstimates

        protected void copyEstimates​(OptimizerNode node)

      • getIterationNode

        public abstract IterationNode getIterationNode()

      • getIncomingConnections

        public List<DagConnection> getIncomingConnections()
        Description copied from class: OptimizerNode
        Gets all incoming connections of this node. This method needs to be overridden by subclasses to return the children.
        Specified by:
        getIncomingConnections in class OptimizerNode
        Returns:
        The list of incoming connections.

      • setInput

        public void setInput​(Map<org.apache.flink.api.common.operators.Operator<?>,​OptimizerNode> contractToNode,
                     org.apache.flink.api.common.ExecutionMode dataExchangeMode)
        Description copied from class: OptimizerNode
        This function connects the predecessors to this operator.
        Specified by:
        setInput in class OptimizerNode
        Parameters:
        contractToNode - The map from program operators to optimizer nodes.
        dataExchangeMode - The data exchange mode to use, if the operator does not specify one.

      • computeInterestingPropertiesForInputs

        public void computeInterestingPropertiesForInputs​(CostEstimator estimator)
        Description copied from class: OptimizerNode
        Tells the node to compute the interesting properties for its inputs. The interesting properties for the node itself must have been computed before. The node must then see how many of interesting properties it preserves and add its own.
        Specified by:
        computeInterestingPropertiesForInputs in class OptimizerNode
        Parameters:
        estimator - The CostEstimator instance to use for plan cost estimation.

      • getAlternativePlans

        public List<PlanNode> getAlternativePlans​(CostEstimator estimator)
        Description copied from class: OptimizerNode
        Computes the plan alternatives for this node, an implicitly for all nodes that are children of this node. This method must determine for each alternative the global and local properties and the costs. This method may recursively call getAlternatives() on its children to get their plan alternatives, and build its own alternatives on top of those.
        Specified by:
        getAlternativePlans in class OptimizerNode
        Parameters:
        estimator - The cost estimator used to estimate the costs of each plan alternative.
        Returns:
        A list containing all plan alternatives.

      • getSemanticProperties

        public org.apache.flink.api.common.operators.SemanticProperties getSemanticProperties()
        Specified by:
        getSemanticProperties in class OptimizerNode

      • readStubAnnotations

        protected void readStubAnnotations()
        Description copied from class: OptimizerNode
        Reads all stub annotations, i.e. which fields remain constant, what cardinality bounds the functions have, which fields remain unique.
        Overrides:
        readStubAnnotations in class OptimizerNode

      • accept

        public void accept​(org.apache.flink.util.Visitor<OptimizerNode> visitor)
        Description copied from class: OptimizerNode
        This method implements the visit of a depth-first graph traversing visitor. Implementers must first call the preVisit() method, then hand the visitor to their children, and finally call the postVisit() method.
        Specified by:
        accept in interface org.apache.flink.util.Visitable<OptimizerNode>
        Specified by:
        accept in class OptimizerNode
        Parameters:
        visitor - The graph traversing visitor.
        See Also:
        Visitable.accept(org.apache.flink.util.Visitor)