How to detect a rollback in MySQL stored procedure?

I'm trying to figure out a way to detect an occurrence of rollback in a MySQL stored procedure so I could handle the situation accordingly from a PHP script, but so far I can not find any solution.

My stored procedure looks like this:

     delimiter |
      create procedure multi_inserts(
      IN var1 int(11),
           .
           .
           .
      IN string1 text
      )
      BEGIN

      declare exit handler for sqlexception rollback;
      declare exit handler for sqlwarning rollback;

      START TRANSACTION;
      insert into table1(a,b,c,d) values(var1,var2,var3,var4);
      insert into table2(e,f,g) values(var5,var6,string1);
      COMMIT;

      END
      delimiter ;

I did a rollback test on this procedure and it did rollback but I got no false. I want my stored procedure to throw some kind of error message if the transaction failed, so I could handle it like this:

    $result = mysql_query($procedure)开发者_运维知识库; 
    if(!$result) 
    {
      //rollback occured do something   
    }

Is there a way to detect rollback in MySQL? Am I missing something? Any reply will be appreciated. Thanks for reading.

Thanks to your advices I fixed this problem. Here's what I did:

Stored Procedure

     delimiter |
      create procedure multi_inserts(
      IN var1 int(11),
           .
           .
           .
      IN string1 text
      )
      BEGIN

      declare exit handler for sqlexception sqlwarning
      BEGIN
      rollback;
      select -1;
      END;

      START TRANSACTION;
      insert into table1(a,b,c,d) values(var1,var2,var3,var4);
      insert into table2(e,f,g) values(var5,var6,string1);
      COMMIT;

      END
      delimiter ;

If I use out variable instead of select -1, it gives me this error:

OUT or INOUT argument is not a variable or NEW pseudo-variable in BEFORE trigger

I don't know what did I wrong, but I couldn't fix this problem.

PHP script

$result=mysqli_query($con,$procedure);
if(is_object($result))
{
//rollback happened do something!
}

If the SP is successful it throws true.

You can add an output param and then set it to the value you want in your exit handlers.

Here's an example using your proc:

delimiter $$
  create procedure multi_inserts(
  IN var1 int(11),
       .
       .
       .
  IN string1 text,
  OUT p_return_code tinyint unsigned
  )
  BEGIN

  DECLARE exit handler for sqlexception
  BEGIN
    -- ERROR
    set p_return_code = 1;
    rollback;
  END;

  DECLARE exit handler for sqlwarning
  BEGIN
    -- WARNING
    set p_return_code = 2;
    rollback;
  END;

  START TRANSACTION;
  insert into table1(a,b,c,d) values(var1,var2,var3,var4);
  insert into table2(e,f,g) values(var5,var6,string1);
  COMMIT;

  -- SUCCESS
  set p_return_code = 0;

  END $$
  delimiter ;

You would usually do this PHP-side if you wanted to catch errors. Read http://php.net/manual/en/pdo.transactions.php for more information.

Hey do one thing, use OUTPUT variable and return 1 or 0 as result form SP and do what ever you want on this flag.

<?php
try {
    $user='root';
    $pass='';
  $dbh = new PDO('mysql:host=localhost;dbname=dbname', $user, $pass, 
      array(PDO::ATTR_PERSISTENT => true));
  echo "Connected\n";
} catch (Exception $e) {
  die("Unable to connect: " . $e->getMessage());
}

try {  
  $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  $dbh->beginTransaction();
  $dbh->exec("insert into staff (id, first, last) values (23, 'Joe', 'Bloggs')");
  $dbh->exec("insert into salarychange (id, amount, changedate) 
      values (23, 50000, NOW())");
  $dbh->commit();

} 
catch (Exception $e) {
  $dbh->rollBack();
  echo "Failed: " . $e->getMessage();
}
?>