MicroSecondsAdd.java

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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.DateAddSubMonotonic;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.functions.PropagateNullableOnDateOrTimeLikeV2Args;
import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.DateTimeV2Type;
import org.apache.doris.nereids.types.IntegerType;

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

import java.util.List;

/**
 * ScalarFunction 'MicroSeconds_add'.
 */
public class MicroSecondsAdd extends ScalarFunction
        implements BinaryExpression, ExplicitlyCastableSignature, PropagateNullableOnDateOrTimeLikeV2Args,
        DateAddSubMonotonic {

    private static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(DateTimeV2Type.MAX)
                    .args(DateTimeV2Type.MAX, IntegerType.INSTANCE));

    public MicroSecondsAdd(Expression arg0, Expression arg1) {
        super("microseconds_add", arg0, arg1);
    }

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

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

    @Override
    public FunctionSignature computeSignature(FunctionSignature signature) {
        signature = super.computeSignature(signature);
        return signature.withArgumentType(0, DateTimeV2Type.MAX).withReturnType(DateTimeV2Type.MAX);
    }

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

    @Override
    public Expression withConstantArgs(Expression literal) {
        return new MicroSecondsAdd(literal, child(1));
    }
}