Invalid PDO query does not return an error

Question

The second SQL statement below returns an error in phpMyAdmin:

SET @num=2000040;
INSERT INTO artikel( artikel_nr, lieferant_nr, bezeichnung_1, bezeichnung_1 )
SE         


        

Answer 1

If you have the option to use mysqli instead of PDO for the multi query, you can use mysqli_multi_query. As error handling is a little complex, here is my function:

/**
 * Executes multiple queries at once (separated by semicolons) and discards the results
 *
 * @param string $sql
 * @throws RuntimeException if a query failed
 */
function multi_query($sql) {
    $mysqli = new mysqli('host', 'user', 'password', 'database');


    //Execute all queries
    $index = 1;
    if ($mysqli->multi_query($sql)) {
        do {
            // next_result() fails if store_result() is not called
            if ($result = $mysqli->store_result()) {
                $result->free();
            }
            $has_next = $mysqli->more_results();
            if (!$has_next)
                return; // all queries successfully executed
            $index++;
        } while ($mysqli->next_result());
    }
    // At this point, either the multi_query() has returned false - which is
    // when the first query failed - or more_results() was true, while next_result()
    // returned false - which is when a different query failed.

    $error = $mysqli->error;
    if (!$error)
        $error = $mysqli->errno ? "errno $mysqli->errno" : '(unknown error)';
    throw new RuntimeException("mysqli query $index failed: $error");
}