php request of mysql query timeout - php

Question

i'm trying to make a long mysql query and process and update the row founded:
$query = 'SELECT tvshows.id_show, tvshows.actors FROM tvshows where tvshows.actors is not NULL';
$result = mysql_query($query);
$total = mysql_num_rows($result);
echo $total;
while ($db_row = mysql_fetch_assoc($result))
{
//process row
}
but after 60 second give me a timeout request, i have try to insert these in my php code:
set_time_limit(400);
but it's the same, how i can do?
EDIT:
only the query:
$query = 'SELECT tvshows.id_show, tvshows.actors FROM tvshows where tvshows.actors is not NULL';
takes 2-3 second to perform, so i think the problem is when in php i iterate all the result to insert to row or update it, so i think the problem is in the php, how i can change the timeout?
EDIT:
here is the complete code, i don't think is a problem here in the code...
$query = 'SELECT tvshows.id_show, tvshows.actors FROM tvshows where tvshows.actors is not NULL';
$result = mysql_query($query);
$total = mysql_num_rows($result);
echo $total;
while ($db_row = mysql_fetch_assoc($result)) {
//print $db_row['id_show']."-".$db_row['actors']."<BR>";
$explode = explode("|", $db_row['actors']);
foreach ($explode as $value) {
if ($value != "") {
$checkactor = mysql_query(sprintf("SELECT id_actor,name FROM actors WHERE name = '%s'",mysql_real_escape_string($value))) or die(mysql_error());
if (mysql_num_rows($checkactor) != 0) {
$actorrow = mysql_fetch_row($checkactor);
$checkrole = mysql_query(sprintf("SELECT id_show,id_actor FROM actor_role WHERE id_show = %d AND id_actor = %d",$db_row['id_show'],$actorrow[0])) or die(mysql_error());
if (mysql_num_rows($checkrole) == 0) {
$insertactorrole = mysql_query(sprintf("INSERT INTO actor_role (id_show, id_actor) VALUES (%d, %d)",$db_row['id_show'],$actorrow[0])) or die(mysql_error());
}
} else {
$insertactor = mysql_query(sprintf("INSERT INTO actors (name) VALUES ('%s')",mysql_real_escape_string($value))) or die(mysql_error());
$insertactorrole = mysql_query(sprintf("INSERT INTO actor_role (id_show, id_actor, role) VALUES (%d, %d,'')",$db_row['id_show'],mysql_insert_id())) or die(mysql_error());
}
}
}
}

Answer 1

Should definitely try what #rid suggested, and to execute the query on the server and see the results/duration to debug - if the query is not a simple one, construct it as you would in your PHP script, and only echo the SQL command, don't have to execute it, and just copy that in to the server MySQL command line or whichever tool you use.
If you have shell access, use the top command after running the above script again, and see if the MySQL demon server is spiking in resources to see if it really is the cause.
Can you also try a simpler query in place of the longer one? Like just a simple SELECT count(*) FROM tvshows and see if that also takes a long time to return a value?
Hope these suggestions help.

Answer 2

There are so many problems with your code.
Don't store multiple values in a single column. Your actors column is pipe-delimited text. This is a big no-no.
Use JOINs instead of additional queries. You can (or could, if the above weren't true) get all of this data in a single query.
All of your code can be done in a single query on the server. As I see it, it takes no input from the user and produces no output. It just updates a table. Why do this in PHP? Learn about INSERT...SELECT....
Here are some resources to get you started (from Googling, but hopefully they'll be good enough):
http://www.sitepoint.com/understanding-sql-joins-mysql-database/
http://dev.mysql.com/doc/refman/5.1/en/join.html
http://dev.mysql.com/doc/refman/5.1/en/insert-select.html
What is Normalisation (or Normalization)?
Let me know if you have any further questions.