Rpad.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.AlwaysNullable;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.functions.PropagateNullLiteral;
import org.apache.doris.nereids.trees.expressions.shape.TernaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.IntegerType;
import org.apache.doris.nereids.types.StringType;
import org.apache.doris.nereids.types.VarcharType;

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

import java.util.List;

/**
 * ScalarFunction 'rpad'. This class is generated by GenerateFunction.
 */
public class Rpad extends ScalarFunction
        implements TernaryExpression, ExplicitlyCastableSignature, AlwaysNullable, PropagateNullLiteral {

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

    /**
     * constructor with 3 arguments.
     */
    public Rpad(Expression arg0, Expression arg1, Expression arg2) {
        super("rpad", arg0, arg1, arg2);
    }

    /**
     * withChildren.
     */
    @Override
    public Rpad withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 3);
        return new Rpad(children.get(0), children.get(1), children.get(2));
    }

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

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