PhysicalLazyMaterializeFileScan.java

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.doris.nereids.trees.plans.physical;

import org.apache.doris.nereids.trees.expressions.Slot;
import org.apache.doris.nereids.trees.expressions.SlotReference;

import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Optional;

/**
    wrapper for FileScan used for lazy materialization
 */
public class PhysicalLazyMaterializeFileScan extends PhysicalFileScan {
    private PhysicalFileScan scan;
    private SlotReference rowId;
    private final List<Slot> lazySlots;
    private List<Slot> output;

    /**
     * PhysicalLazyMaterializeFileScan
     */
    public PhysicalLazyMaterializeFileScan(PhysicalFileScan scan, SlotReference rowId, List<Slot> lazySlots) {
        super(scan.getRelationId(), scan.getTable(), scan.getQualifier(), scan.getDistributionSpec(),
                Optional.empty(), null, null, scan.getStats(),
                scan.selectedPartitions, scan.getTableSample(),
                scan.getTableSnapshot(), scan.getOperativeSlots());
        this.scan = scan;
        this.rowId = rowId;
        this.lazySlots = lazySlots;
    }

    @Override
    public List<String> getQualifier() {
        return scan.getQualifier();
    }

    @Override
    public List<Slot> computeOutput() {
        if (output == null) {
            output = ImmutableList.<Slot>builder()
                    .addAll(scan.getOperativeSlots())
                    .add(rowId).build();
        }
        return output;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("PhysicalLazyMaterializeFileScan[")
                .append(scan.toString());

        if (!getAppliedRuntimeFilters().isEmpty()) {
            getAppliedRuntimeFilters().forEach(rf -> sb.append(" RF").append(rf.getId().asInt()));
        }
        sb.append("]");
        return sb.toString();
    }
}