/*
 * Copyright (c) 2011-2024, baomidou (jobob@qq.com).
 *
 * Licensed 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.
 */
package com.baomidou.mybatisplus.extension.plugins.pagination.dialects;

import com.baomidou.mybatisplus.extension.plugins.pagination.DialectModel;

/**
 * DB2 数据库分页方言
 *
 * @author hubin
 * @since 2016-11-10
 */
public class DB2Dialect implements IDialect {

    @Override
    public DialectModel buildPaginationSql(String originalSql, long offset, long limit) {
        long firstParam = offset + 1;
        long secondParam = offset + limit;
        String sql = "SELECT * FROM (SELECT TMP_PAGE.*,ROWNUMBER() OVER() AS ROW_ID FROM ( " + originalSql +
            " ) AS TMP_PAGE) TMP_PAGE WHERE ROW_ID BETWEEN " + FIRST_MARK + " AND " + SECOND_MARK;
        return new DialectModel(sql, firstParam, secondParam).setConsumerChain();
    }
}
