src/paimon/common/predicate/starts_with.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <string>

#include "paimon/common/predicate/string_leaf_binary_function.h"
#include "paimon/common/utils/string_utils.h"
#include "paimon/result.h"

namespace paimon {
/// A `StringLeafBinaryFunction` to eval filter like 'abc%' or filter like 'abc_'.
class StartsWith : public StringLeafBinaryFunction {
 public:
    static const StartsWith& Instance() {
        static const StartsWith instance = StartsWith();
        return instance;
    }

    Type GetType() const override {
        return Type::STARTS_WITH;
    }

    std::string ToString() const override {
        return "StartsWith";
    }

    Result<bool> TestString(const std::string& field, const std::string& pattern) const override;

    Result<bool> Test(int64_t row_count, const Literal& min_value, const Literal& max_value,
                      const std::optional<int64_t>& null_count,
                      const Literal& pattern_literal) const override;

 private:
    StartsWith() = default;
};
}  // namespace paimon