Re: rollback option in mysql

[Udaya kumar <udayakumaar@xxxxxxxxx>]

Hi Balaji,

Your MySQL DB engine must be an InnoDB. 

$sql = "BEGIN";
$result = mysql_query($sql, $connect);

$sql = "<UPDATE Table1>";
$result = mysql_query($sql, $connect);
$nrow = mysql_affected_rows();
if ($nrow == 1) {
  $sql = "<UPDATE Table2>";
  $result = mysql_query($sql, $connect);
  $nrow = mysql_affected_rows();
  if ($nrow == 1) {
      $sql = "COMMIT";
      $result = mysql_query($sql, $connect);
  }
  else {
      $sql = "ROLLBACK";
      $result = mysql_query($sql, $connect);
  }
}

You may have known the use of mysql transactions. When you want to run more than one query for a connection, you can use mysql transactions for successful updates or inserts into the various tables in the MySQL. When all the queries successfully  execute, you can commit all the changes otherwise you can rollback the previous changes.

If you need more clarification, please read Core MySQL book.

Thanks for remembering transactions.
 
Thanks & Regards
Udayakumar Sarangapani
Sr. PHP Developer
CompIndia Infotech Pvt. Ltd..
Chennai.

"Science is nothing but logic..."


----- Original Message ----
From: rbalaji1275 <rbalaji@xxxxxxx>
To: php-objects@xxxxxxxxxxxxxxx
Sent: Tuesday, 6 May, 2008 6:50:32 AM
Subject:  rollback option in mysql

                Hi,

I would like to have commit and rollback in database. I am using MySql
5.0.27-std. if any one can help me to do this.
Balaji 


    
          			
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