将大型CSV导入mysql数据库

Question

我在尝试将大型CSV文件导入localhost上的mysql时遇到了麻烦.

CSV大约为55 MB,大约有750,000行.

我重写了脚本,以便它解析CSV并逐个转储行.

这是代码:

$row = 1;
if (($handle = fopen("postal_codes.csv", "r")) !== FALSE) 
{
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) 
    {
        $num = count($data);
        $row++;
        for ($c=0; $c < $num; $c++) 
        {
            $arr = explode('|', $data[$c]);

            $postcode = mysql_real_escape_string($arr[1]);
            $city_name = mysql_real_escape_string($arr[2]);
            $city_slug = mysql_real_escape_string(toAscii($city_name));
            $prov_name = mysql_real_escape_string($arr[3]);
            $prov_slug = mysql_real_escape_string(toAscii($prov_name));
            $prov_abbr = mysql_real_escape_string($arr[4]);
            $lat = mysql_real_escape_string($arr[6]);
            $lng = mysql_real_escape_string($arr[7]);

            mysql_query("insert into cities (`postcode`, `city_name`, `city_slug`, `prov_name`, `prov_slug`, `prov_abbr`, `lat`, `lng`) 
                         values ('$postcode', '$city_name', '$city_slug', '$prov_name', '$prov_slug', '$prov_abbr', '$lat', '$lng')") or die(mysql_error());
        }
    }
    fclose($handle);
}

问题是它需要永远执行.任何suuggested解决方案将不胜感激.

Answer 1

你正在重新发明轮子.查看MySQL附带的mysqlimport工具.它是导入CSV数据文件的有效工具.

mysqlimport是LOAD DATA LOCAL INFILESQL语句的命令行界面.

两者应该比逐行执行INSERT快10-20倍.