IvmDeltaRewriteResult.java

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package org.apache.doris.mtmv.ivm;

import org.apache.doris.nereids.trees.expressions.Slot;
import org.apache.doris.nereids.trees.plans.Plan;

import java.util.Objects;

/**
 * Result of one delta rewrite visitor step.
 *
 * <p>{@code maxDeltaIndex} is rewrite metadata used to allocate outer-join synthetic-row
 * sequences. It is the maximum delta index among all child delta scans and is not an output slot.
 */
public class IvmDeltaRewriteResult {
    final Plan plan;
    final Slot dmlFactorSlot;
    final Slot sequenceSlot;
    final int maxDeltaIndex;

    IvmDeltaRewriteResult(Plan plan, Slot dmlFactorSlot, Slot sequenceSlot, int maxDeltaIndex) {
        this.plan = Objects.requireNonNull(plan, "plan can not be null");
        this.dmlFactorSlot = Objects.requireNonNull(dmlFactorSlot, "dml factor slot can not be null");
        this.sequenceSlot = Objects.requireNonNull(sequenceSlot, "sequence slot can not be null");
        this.maxDeltaIndex = maxDeltaIndex;
    }
}