GroupingFunctionCallExpr.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.analysis;

import java.util.ArrayList;
import java.util.List;

/**
 * mapping the real slot to virtual slots, grouping(_id) function will use a virtual slot of BIGINT to substitute
 * real slots, and then set real slot to realChildren
 */
public class GroupingFunctionCallExpr extends FunctionCallExpr {
    private boolean childrenReseted = false;
    private List<Expr> realChildren;

    public GroupingFunctionCallExpr(FunctionName functionName, FunctionParams params) {
        super(functionName, params);
        childrenReseted = false;
    }

    public GroupingFunctionCallExpr(GroupingFunctionCallExpr other) {
        super(other);
        this.childrenReseted = other.childrenReseted;
        if (this.childrenReseted) {
            this.realChildren = Expr.cloneList(other.realChildren);
        }
    }

    @Override
    public Expr clone() {
        return new GroupingFunctionCallExpr(this);
    }

    @Override
    public Expr reset() {
        if (childrenReseted) {
            children = new ArrayList<>();
            children.addAll(realChildren);
        }
        childrenReseted = false;
        realChildren = null;
        return super.reset();
    }

    @Override
    public boolean supportSerializable() {
        return false;
    }
}