/*
 * Copyright (c) 2011-2020, baomidou (jobob@qq.com).
 * <p>
 * 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
 * <p>
 * https://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.core.toolkit.StringPool;
import com.baomidou.mybatisplus.extension.plugins.pagination.DialectModel;

/**
 * MYSQL 数据库分页语句组装实现
 *
 * @author hubin
 * @since 2016-01-23
 */
public class MySqlDialect implements IDialect {

    @Override
    public DialectModel buildPaginationSql(String originalSql, long offset, long limit) {
        if (offset != 0L) {
            String sql = originalSql + " LIMIT " + FIRST_MARK + StringPool.COMMA + SECOND_MARK;
            return new DialectModel(sql, offset, limit).setConsumerChain();
        } else {
            String sql = originalSql + " LIMIT " + FIRST_MARK;
            return new DialectModel(sql, limit).setConsumer(true);
        }
    }
}

@@ -1061,92 +1061,170 @@
     
-if (offset != 0L) %7B%0A            String sql = originalSql + %22 LIMIT %22 + FIRST_MARK + 
+StringBuilder sql = new StringBuilder();%0A        sql.append(originalSql).append(%22 LIMIT %22).append(FIRST_MARK);%0A        if (offset != 0L) %7B%0A            sql.append(
 Stri
@@ -1235,19 +1235,25 @@
 ol.COMMA
- + 
+).append(
 SECOND_M
@@ -1251,24 +1251,25 @@
 (SECOND_MARK
+)
 ;%0A          
@@ -1297,16 +1297,27 @@
 odel(sql
+.toString()
 , offset
@@ -1366,71 +1366,8 @@
 e %7B%0A
-            String sql = originalSql + %22 LIMIT %22 + FIRST_MARK;%0A
     
@@ -1401,16 +1401,27 @@
 odel(sql
+.toString()
 , limit)

优化 string 字符串