How Can I Securely and Efficiently Perform Mass INSERT Operations in MySQLi?

Optimizing Mass INSERT Operations in MySQLi: A Secure and Efficient Approach

Inserting large volumes of data into a MySQL database requires a technique that ensures both security and performance. This article explores a method for efficiently inserting numerous rows into a table while mitigating the risk of SQL injections.

The provided code, which utilizes multiple prepared statements inside a loop, can introduce a performance bottleneck and potential stack overflow issues. A better approach is to place the inserts within a transaction and move the prepared statement and parameter binding outside the loop.

$mysqli->query("START TRANSACTION");
$query = "INSERT INTO table (link) VALUES (?)";
$stmt = $mysqli->prepare($query);
$stmt->bind_param("s", $one);
foreach ($array as $one) {
    $stmt->execute();
}
$mysqli->query("COMMIT");

Benefits of Using Transactions

Transactions provide several advantages for bulk inserts:

• Performance Optimization: By grouping multiple inserts into a single transaction, the database can process them more efficiently, reducing the overall execution time.
• Atomicity: Transactions ensure that either all inserts are executed successfully or none at all. If any error occurs during the transaction, the changes made prior to the error are automatically rolled back, maintaining data integrity.
• Isolation: Transactions isolate the insert operations from other concurrent database activities, preventing data corruption or race conditions.

In performance tests, moving the inserts into a transaction resulted in a significant speed increase. For 10,000 iterations, the execution time dropped from 226 seconds without transactions to a mere 2 seconds with transactions.

This approach provides a secure and efficient mechanism for inserting large datasets into a MySQL database while mitigating the potential risks of SQL injections and performance bottlenecks.

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