thinkphp/library/think/db/builder/Pgsql.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db\builder;

use think\db\Builder;

/**
 * Pgsql数据库驱动
 */
class Pgsql extends Builder
{
    protected $insertSql    = 'INSERT INTO %TABLE% (%FIELD%) VALUES (%DATA%) %COMMENT%';
    protected $insertAllSql = 'INSERT INTO %TABLE% (%FIELD%) %DATA% %COMMENT%';

    /**
     * limit分析
     * @access protected
     * @param mixed $limit
     * @return string
     */
    public function parseLimit($limit)
    {
        $limitStr = '';
        if (!empty($limit)) {
            $limit = explode(',', $limit);
            if (count($limit) > 1) {
                $limitStr .= ' LIMIT ' . $limit[1] . ' OFFSET ' . $limit[0] . ' ';
            } else {
                $limitStr .= ' LIMIT ' . $limit[0] . ' ';
            }
        }
        return $limitStr;
    }

    /**
     * 字段和表名处理
     * @access protected
     * @param mixed  $key
     * @param array  $options
     * @return string
     */
    protected function parseKey($key, $options = [], $strict = false)
    {
        if (is_numeric($key)) {
            return $key;
        } elseif ($key instanceof Expression) {
            return $key->getValue();
        }

        $key = trim($key);
        if (strpos($key, '$.') && false === strpos($key, '(')) {