vendor/topthink/think-orm/src/db/builder/Oracle.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\db\builder;

use think\db\Builder;
use think\db\Query;

/**
 * Oracle数据库驱动
 */
class Oracle extends Builder
{
    protected $selectSql = 'SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT  %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%) thinkphp ) %LIMIT%%COMMENT%';

    /**
     * limit分析
     * @access protected
     * @param  Query $query 查询对象
     * @param  mixed $limit
     * @return string
     */
    protected function parseLimit(Query $query, string $limit): string
    {
        $limitStr = '';

        if (!empty($limit)) {
            $limit = explode(',', $limit);

            if (count($limit) > 1) {
                $limitStr = "(numrow>" . $limit[0] . ") AND (numrow<=" . ($limit[0] + $limit[1]) . ")";
            } else {
                $limitStr = "(numrow>0 AND numrow<=" . $limit[0] . ")";
            }

        }

        return $limitStr ? ' WHERE ' . $limitStr : '';
    }

    /**
     * 设置锁机制
     * @access protected
     * @param  Query      $query 查询对象
     * @param  bool|false $lock
     * @return string
     */
    protected function parseLock(Query $query, $lock = false): string
    {
        if (!$lock) {
            return '';
        }