PhysicalAssertNumRows.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.memo.GroupExpression;
import org.apache.doris.nereids.properties.DataTrait;
import org.apache.doris.nereids.properties.LogicalProperties;
import org.apache.doris.nereids.properties.PhysicalProperties;
import org.apache.doris.nereids.trees.expressions.AssertNumRowsElement;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.Slot;
import org.apache.doris.nereids.trees.plans.Plan;
import org.apache.doris.nereids.trees.plans.PlanType;
import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor;
import org.apache.doris.nereids.util.Utils;
import org.apache.doris.statistics.Statistics;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;

/**
 * Physical assertNumRows.
 */
public class PhysicalAssertNumRows<CHILD_TYPE extends Plan> extends PhysicalUnary<CHILD_TYPE> {

    private final AssertNumRowsElement assertNumRowsElement;

    public PhysicalAssertNumRows(AssertNumRowsElement assertNumRowsElement,
            LogicalProperties logicalProperties, CHILD_TYPE child) {
        super(PlanType.PHYSICAL_ASSERT_NUM_ROWS, Optional.empty(), logicalProperties, child);
        this.assertNumRowsElement = assertNumRowsElement;
    }

    public PhysicalAssertNumRows(AssertNumRowsElement assertNumRowsElement, Optional<GroupExpression> groupExpression,
            LogicalProperties logicalProperties, PhysicalProperties physicalProperties,
            Statistics statistics, CHILD_TYPE child) {
        super(PlanType.PHYSICAL_ASSERT_NUM_ROWS, groupExpression, logicalProperties, physicalProperties,
                statistics, child);
        this.assertNumRowsElement = assertNumRowsElement;
    }

    @Override
    public List<Slot> computeOutput() {
        return child().getOutput().stream().map(o -> o.withNullable(true)).collect(Collectors.toList());
    }

    public AssertNumRowsElement getAssertNumRowsElement() {
        return assertNumRowsElement;
    }

    @Override
    public String toString() {
        return Utils.toSqlString("PhysicalAssertNumRows" + getGroupIdWithPrefix(),
                "assertNumRowsElement", assertNumRowsElement);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        PhysicalAssertNumRows that = (PhysicalAssertNumRows) o;
        return assertNumRowsElement.equals(that.assertNumRowsElement);
    }

    @Override
    public int hashCode() {
        return Objects.hash(assertNumRowsElement);
    }

    @Override
    public List<? extends Expression> getExpressions() {
        return ImmutableList.of();
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitPhysicalAssertNumRows(this, context);
    }

    @Override
    public PhysicalAssertNumRows<Plan> withChildren(List<Plan> children) {
        Preconditions.checkArgument(children.size() == 1);
        return new PhysicalAssertNumRows<>(assertNumRowsElement, groupExpression,
                getLogicalProperties(), physicalProperties, statistics, children.get(0));
    }

    @Override
    public PhysicalAssertNumRows<CHILD_TYPE> withGroupExpression(Optional<GroupExpression> groupExpression) {
        return new PhysicalAssertNumRows<>(assertNumRowsElement, groupExpression,
                getLogicalProperties(), physicalProperties, statistics, child());
    }

    @Override
    public Plan withGroupExprLogicalPropChildren(Optional<GroupExpression> groupExpression,
            Optional<LogicalProperties> logicalProperties, List<Plan> children) {
        Preconditions.checkArgument(children.size() == 1);
        return new PhysicalAssertNumRows<>(assertNumRowsElement, groupExpression,
                logicalProperties.get(), physicalProperties, statistics, children.get(0));
    }

    @Override
    public PhysicalAssertNumRows<CHILD_TYPE> withPhysicalPropertiesAndStats(PhysicalProperties physicalProperties,
            Statistics statistics) {
        return new PhysicalAssertNumRows<>(assertNumRowsElement, groupExpression,
                getLogicalProperties(), physicalProperties, statistics, child());
    }

    @Override
    public PhysicalAssertNumRows<CHILD_TYPE> resetLogicalProperties() {
        return new PhysicalAssertNumRows<>(assertNumRowsElement, groupExpression,
                null, physicalProperties, statistics, child());
    }

    @Override
    public void computeUnique(DataTrait.Builder builder) {
        if (assertNumRowsElement.getDesiredNumOfRows() == 1
                && (assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.EQ
                || assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.LT
                || assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.LE)) {
            getOutput().forEach(builder::addUniqueSlot);
        }
    }

    @Override
    public void computeUniform(DataTrait.Builder builder) {
        if (assertNumRowsElement.getDesiredNumOfRows() == 1
                && (assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.EQ
                || assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.LT
                || assertNumRowsElement.getAssertion() == AssertNumRowsElement.Assertion.LE)) {
            getOutput().forEach(builder::addUniformSlot);
        }
    }

    @Override
    public void computeEqualSet(DataTrait.Builder builder) {
        builder.addEqualSet(child().getLogicalProperties().getTrait());
    }

    @Override
    public void computeFd(DataTrait.Builder builder) {
        builder.addFuncDepsDG(child().getLogicalProperties().getTrait());
    }
}