MakeDate.java

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// to you under the Apache License, Version 2.0 (the
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package org.apache.doris.nereids.trees.expressions.functions.scalar;

import org.apache.doris.catalog.FunctionSignature;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.AlwaysNullable;
import org.apache.doris.nereids.trees.expressions.functions.DateDiffMonotonic;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.literal.Literal;
import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.DateType;
import org.apache.doris.nereids.types.IntegerType;

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

import java.util.List;

/**
 * ScalarFunction 'makedate'. This class is generated by GenerateFunction.
 */
public class MakeDate extends ScalarFunction
        implements BinaryExpression, ExplicitlyCastableSignature, AlwaysNullable, DateDiffMonotonic {

    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(DateType.INSTANCE).args(IntegerType.INSTANCE, IntegerType.INSTANCE)
    );

    /**
     * constructor with 2 arguments.
     */
    public MakeDate(Expression arg0, Expression arg1) {
        super("makedate", arg0, arg1);
    }

    /**
     * withChildren.
     */
    @Override
    public MakeDate withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 2);
        return new MakeDate(children.get(0), children.get(1));
    }

    @Override
    public List<FunctionSignature> getSignatures() {
        return SIGNATURES;
    }

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

    @Override
    public boolean isPositive() {
        return true;
    }

    @Override
    public Expression withConstantArgs(Expression literal) {
        if (child(1) instanceof Literal) {
            return new MakeDate(literal, child(1));
        } else {
            return new MakeDate(child(0), literal);
        }
    }
}