LogicalPreAggOnHint.java

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package org.apache.doris.nereids.trees.plans.logical;

import org.apache.doris.nereids.memo.GroupExpression;
import org.apache.doris.nereids.properties.LogicalProperties;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.Slot;
import org.apache.doris.nereids.trees.plans.BlockFuncDepsPropagation;
import org.apache.doris.nereids.trees.plans.DiffOutputInAsterisk;
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 com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

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

/**
 * PreAggOn hint.
 */
public class LogicalPreAggOnHint<CHILD_TYPE extends Plan> extends LogicalUnary<CHILD_TYPE>
        implements BlockFuncDepsPropagation, DiffOutputInAsterisk {

    public LogicalPreAggOnHint(CHILD_TYPE child) {
        this(Optional.empty(), Optional.empty(), child);
    }

    /**
     * LogicalCommonHint's full parameter constructor.
     * @param groupExpression groupExpression exists when this plan is copy out from memo.
     * @param logicalProperties logicalProperties is use for compute output
     * @param child child plan
     */
    public LogicalPreAggOnHint(Optional<GroupExpression> groupExpression,
            Optional<LogicalProperties> logicalProperties, CHILD_TYPE child) {
        super(PlanType.LOGICAL_COMMON_HINT, groupExpression, logicalProperties, child);
    }

    @Override
    public LogicalPreAggOnHint<Plan> withChildren(List<Plan> children) {
        Preconditions.checkArgument(children.size() == 1);
        return new LogicalPreAggOnHint<>(children.get(0));
    }

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

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

    @Override
    public Plan withGroupExpression(Optional<GroupExpression> groupExpression) {
        return new LogicalPreAggOnHint<>(groupExpression, Optional.of(getLogicalProperties()), child());
    }

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

    @Override
    public List<Slot> computeOutput() {
        return child().getOutput();
    }
}