UnassignedJob.java

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package org.apache.doris.nereids.trees.plans.distribute.worker.job;

import org.apache.doris.nereids.StatementContext;
import org.apache.doris.nereids.trees.TreeNode;
import org.apache.doris.nereids.trees.plans.distribute.DistributeContext;
import org.apache.doris.nereids.trees.plans.distribute.worker.DistributedPlanWorker;
import org.apache.doris.planner.ExchangeNode;
import org.apache.doris.planner.PlanFragment;
import org.apache.doris.planner.ScanNode;
import org.apache.doris.thrift.TUniqueId;

import com.google.common.collect.ListMultimap;

import java.util.List;

/**
 * WorkerJob.
 * for example: a fragment job, which doesn't parallelization to some instance jobs and also no worker to invoke it
 */
public interface UnassignedJob extends TreeNode<UnassignedJob> {
    StatementContext getStatementContext();

    PlanFragment getFragment();

    List<ScanNode> getScanNodes();

    ListMultimap<ExchangeNode, UnassignedJob> getExchangeToChildJob();

    List<AssignedJob> computeAssignedJobs(
            DistributeContext distributeContext, ListMultimap<ExchangeNode, AssignedJob> inputJobs);

    // generate an instance job
    // e.g. build an instance job by a backends and the replica ids it contains
    default AssignedJob assignWorkerAndDataSources(
            int instanceIndexInFragment, TUniqueId instanceId, DistributedPlanWorker worker, ScanSource scanSource) {
        return new StaticAssignedJob(instanceIndexInFragment, instanceId, this, worker, scanSource);
    }
}