MYSQL multiple insert in codeigniter [duplicate]

问题:

Possible Duplicate:
insert multiple rows via a php array into mysql

I know about the possibility of making a multiple insert in mySQL by doing something like this:

    foreach ($array as $manuf) {    
        $sql[] = '("'.mysql_real_escape_string($manuf['name']).'", "'.$manuf['lang'].'", "'.$mId.'")';
    }

    $this->db->query('INSERT INTO manufacturers (name, lang ,mid) VALUES ' . implode(',', $sql) );

I wonder if there's a better way to do this and maybe extending the current DB (active-record) library to make it with even less code?

Thanks

回答1:

You need to be clear about your reason for wanting to insert multiple rows in a single statement. Is it for performance?

Frameworks are for programming productivity and convenience, but not necessarily performance. I agree with the answer given by @Udi Mosayev -- use the framework API in its simplest usage.

If you are inserting a small number of rows, the difference between inserting one row per statement and multiple rows per statement is insignificant.

If have a large number of rows and you really need them to insert with high-performance, nothing beats LOAD DATA INFILE. Your attempts to optimize usage of INSERT are being penny-wise and pound-foolish. Even dumping your PHP array into a tmpfile and then loading it LOAD DATA is faster than using INSERT.

回答2:

Of course. Just use $this->db->insert('dbTableName', $arrayOfData). The array of data is field->value, and field is the column name in you table inside the DB.

you can read more about it here

回答3:

If you are going to insert really big number of rows you should do it in single query. I don't think that CI is doing it right. PS:Don't forget about mysql maximum query size.