PHP MySQL InnoDB Multiple Inserts to Different Tables Using Transactions Failed

Question

I have been studying transactions and from what I understand, my multiple insert statement should work.

I'm using InnoDB engine. Both insert statements below work and correctly enters the data into the respective tables, but only if I have one of them at a time in the transaction, not both together.

Can someone tell me what I need to do different?

It fails with Affected rows (INSERT): -1

code:

$con->begin_transaction();

$con->autocommit(FALSE);


$query = "

INSERT INTO `Order` (`PO`,`SellingManagerSalesRecordNumber`,`OrderID`,
  `AmountPaid`,`CreatedTime`,`Subtotal`,`Total`,`BuyerUserID`,
  `IsMultiLegShipping`,`Status_id`,`SellerUserID_id`)
   VALUES
   ('AF11514','11514','111809902234-1906167668001','55.98',
  '2019-01-07 17:42:46','55.98','55.98','hyccas3','false',
   (SELECT `id` FROM `Status` WHERE `Status` = 'Completed'),
   (SELECT `id` FROM `SellerUserID` WHERE `SellerUserID` = 'afiperformance'))
   ON DUPLICATE KEY UPDATE PO = VALUES(PO),
   SellingManagerSalesRecordNumber = VALUES(SellingManagerSalesRecordNumber),
   OrderID = VALUES(OrderID),
   AmountPaid = VALUES(AmountPaid),
   CreatedTime = VALUES(CreatedTime), Subtotal = VALUES(Subtotal),
   Total = VALUES(Total),
   BuyerUserID = VALUES(BuyerUserID),
   IsMultiLegShipping = VALUES(IsMultiLegShipping);

INSERT INTO `CheckoutStatus` (`PO`,`LastModifiedTime`, 
         `PaymentMethod_id`,`Status_id`)
   VALUES ('AF11514','2019-01-07 17:47:55',
  (SELECT `id` FROM `PaymentMethod` WHERE `PaymentMethod` = 'PayPal'),
   (SELECT `id` FROM `Status` WHERE `Status` = 'Complete'))
   ON DUPLICATE KEY UPDATE PO = VALUES(PO),
   LastModifiedTime = VALUES(LastModifiedTime);";

echo $query;

$con->query($query);
printf("<br><br>\n\nAffected rows (INSERT): %d ", $con->affected_rows) . "\n\n<br><br>";

if ($con->affected_rows == -1) {
    echo "<br><br>\n\n Failed " . "\n\n<br><br>";
    $con->rollback();
    $commit = '';
} else {
    $commit = $con->commit();
    echo " success " . "\n\n<br><br>";
}

/* commit transaction */
if ($commit == '') {
    print("Transaction commit failed\n");
} else {
    print("Transaction commit success\n");
}

$con->close();

Answer 1

mysqli_query doesn't support multiple queries in one call. You either need to use mysqli_multi_query or split the query into two separate calls to mysqli_query. Since you are using transactions, splitting into two calls would be better as it is hard to get error information for the second and subsequent queries in mysqli_multi_query.