vendor/topthink/think-orm/src/db/connector/Sqlsrv.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db\connector;

use PDO;
use think\db\PDOConnection;

/**
 * Sqlsrv数据库驱动
 */
class Sqlsrv extends PDOConnection
{
    /**
     * 默认PDO连接参数
     * @var array
     */
    protected $params = [
        PDO::ATTR_CASE              => PDO::CASE_NATURAL,
        PDO::ATTR_ERRMODE           => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_ORACLE_NULLS      => PDO::NULL_NATURAL,
        PDO::ATTR_STRINGIFY_FETCHES => false,
    ];

    /**
     * 解析pdo连接的dsn信息
     * @access protected
     * @param  array $config 连接信息
     * @return string
     */
    protected function parseDsn(array $config): string
    {
        $dsn = 'sqlsrv:Database=' . $config['database'] . ';Server=' . $config['hostname'];

        if (!empty($config['hostport'])) {
            $dsn .= ',' . $config['hostport'];
        }

        return $dsn;
    }

    /**
     * 取得数据表的字段信息
     * @access public
     * @param  string $tableName
     * @return array
     */
    public function getFields(string $tableName): array
    {
        [$tableName] = explode(' ', $tableName);

        $sql = "SELECT   column_name,   data_type,   column_default,   is_nullable