Description:
------------
Assume you have a webserver serving two PHP scripts. Both PHP 
scripts use persistent MySQL database connections. Script one 
uses normal mysql_query calls, script two uses 
mysql_unbuffered_query calls.
Also, script one is doing additional mysql_query calls while 
retrieving the records of the first mysql_query (yes, an sql 
join would be better).

When script two (the one with mysql_unbuffered_query) 
finishes, and script one reuses the persistent database 
connection of script two, the resource identifier in script 
one gets lost after the first loop, resulting in only one 
returned row.
get_resource_type($res) should return 'mysql result', but will 
return 'Unknown'


Reproduce code:
---------------
Script1.html:
$db = mysql_pconnect ('host', 'user', 'pass');
print ('We are using MySQL thread: '. mysql_thread_id() .'<br />');

$res = mysql_query ("SELECT * FROM temp.documents");  // table with 1200 records

print ('mysql_num_rows() returned '. mysql_num_rows($res) .'<br />');

while ($row = mysql_fetch_assoc ($res)) {
  $res2 = mysql_query ("SELECT * FROM temp.attachments WHERE document = ". $row['id']);
  while ($row2 = mysql_fetch_assoc ($res2))
    $row['attachments'][] = $row2;

  $documents[] = $row;
}

print ('number of documents: '. count ($documents));


Script2.html:
$db = mysql_pconnect ('host', 'user', 'pass');
print ('We are using MySQL thread: '. mysql_thread_id() .'<br />');
$res = mysql_unbuffered_query ("SELECT * FROM temp.documents");
while ($row = mysql_fetch_assoc ($res)) {
}

Expected result:
----------------
Open script2.html and note the thread id.
Keep opening script1.html until the thread id is the same as 
the one script2 used.
You should see this:
(script2.html)
We are using MySQL thread: 1439

(script1.html)
We are using MySQL thread: 1439
mysql_num_rows() returned 1200
number of documents: 1200

Actual result:
--------------
However, the output will be:
(script2.html)
We are using MySQL thread: 1439

(script1.html)
We are using MySQL thread: 1439
mysql_num_rows() returned 1200
number of documents: 1