mysql - PHP Apache crashes while executing a STORED PROCEDURE -


problem

when execute following code (i'm calling stored procedure 5 in parameters , 1 out parameter)

$conn->query("set @res = ''");  $mysqli=$conn; if (!($stmt = $mysqli->prepare("call retrieve_matches(5,3, 16, 2, false, @res)"))) {     echo "prepare failed: (" . $mysqli->errno . ") " . $mysqli->error; }  if (!$stmt->execute()) {     echo "execute failed: (" . $stmt->errno . ") " . $stmt->error; }  {     if ($res = $stmt->get_result()) { //apache crash on call         printf("---\n");         var_dump(mysqli_fetch_all($res));         mysqli_free_result($res);     } else {         if ($stmt->errno) {             echo "store failed: (" . $stmt->errno . ") " . $stmt->error;         }     } } while ($stmt->more_results() && $stmt->next_result());

apache crashing error:

ah00428: parent: child process 9628 exited status 255 -- restarting.

what tried

  1. this code working fine , it's returning correctly results:
$conn->query("set @res = ''"); $res=$conn->query("call retrieve_matches(5,3, 16, 2, false, @res)"); var_dump($res->fetch_assoc());

note: same code above make apache crashing working correctly if change number in input of stored procedure like: 

if (!($stmt = $mysqli->prepare("call retrieve_matches(5,6, 16, 2, false, @res)"))) {
  1. tried mysql workbench , both calls working fine.
  2. i'm using wamp 64b on win7 enterprise 64b, tried wamp 32b got same problem.
  3. i checked windows event , found httpd.exe crashing caused php5ts.dll
  4. if search "httpd.exe php5ts.dll" on google can find lot of people incountering problem. didn't find solution wamp...
  5. tried ampps, exact same problem

php error log

[10-jul-2015 15:30:03 utc] php warning:  php startup: unable load dynamic library 'c:/program files/wamp/bin/php/php5.5.12/ext/php_ldap.dll' - impossibile trovare il modulo specificato.   in unknown on line 0  [10-jul-2015 15:30:04 utc] php warning:  php startup: unable load dynamic library 'c:/program files/wamp/bin/php/php5.5.12/ext/php_intl.dll' - impossibile trovare il modulo specificato.

apache error log:

[tue jul 14 15:02:13.038276 2015] [mpm_winnt:notice] [pid 7044:tid 404] ah00428: parent: child process 9448 exited status 255 -- restarting. [tue jul 14 15:02:13.324305 2015] [mpm_winnt:notice] [pid 7044:tid 404] ah00455: apache/2.4.9 (win32) php/5.5.12 configured -- resuming normal operations [tue jul 14 15:02:13.329306 2015] [mpm_winnt:notice] [pid 7044:tid 404] ah00456: apache lounge vc11 server built: mar 16 2014 12:13:13 [tue jul 14 15:02:13.329306 2015] [core:notice] [pid 7044:tid 404] ah00094: command line: 'c:\\program files\\wamp\\bin\\apache\\apache2.4.9\\bin\\httpd.exe -d c:/program files/wamp/bin/apache/apache2.4.9' [tue jul 14 15:02:13.352308 2015] [mpm_winnt:notice] [pid 7044:tid 404] ah00418: parent: created child process 3140 [tue jul 14 15:02:14.528388 2015] [mpm_winnt:notice] [pid 3140:tid 332] ah00354: child: starting 64 worker threads.

i'm lost here, should issue? help

edit

i realized stored procedure "retrieve_matches" calling different stored procedure in function of changed value. debugged stored procedure "retrieve_standalone" 1 make apache crashing. procedure doing select/insert, checked , insert made correctly. inside "retrieve_standalone" i'm using cursor in weird way:

declare bnomorerows bool default false; declare tmp_cursor cursor     select comp_id to_match; -- to_match temporary table declare continue handler not found set bnomorerows := true;

if don't open cursor

open tmp_cursor;

everything working fine!! guess found issue, now: how can solve it?

apparently there's bit of buck passing - i.e. scaricabarile - between php guys , mysqli guys.

what seems happening mysqli reacts in "improper" way, , return unexpected value (i'd bet small sum on being null) php, duly coredumps. behaviour is documented , verdict phpland is: "not [php] bug". on side, mysqli guys maintain it's php not correctly checking returned result. , 'improper' results depended on your query anyway.

so i'm going out on limb , supposing yours same problem of "communication difficulties", problem becomes: "your query forces mysqli drop/reconnect". why so? apparently (some) stored procedures require mysqli_multi_query in order behave properly.

and mysqli_multi_query not compatible mysqli_prepare.

so i'd suggest trying without preparing query, , running mysqli_multi_query.

$conn->query("set @res = ''"); $conn->multi_query("call retrieve_matches(5,3, 16, 2, false, @res)");  {     if ($result = $conn->store_result()) {         while ($row = $result->fetch_row()) {             var_dump($row);         }         $result->free();     } } while ($conn->more_results() && $conn->next_result());

with code, test case gets me, expected,

array(1) {   [0] =>   string(4) "test" }

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