#44362 [Bgs]: fetchAll(PDO::FETCH_COLUMN|<other>, ...) and column index -1/PHP_INT_MAX + 1
| From: | uwendel at mysql dot com | Date: | Mon, 10 Mar 2008 08:13:33 +0000 |
| Subject: | #44362 [Bgs]: fetchAll(PDO::FETCH_COLUMN|<other>, ...) and column index -1/PHP_INT_MAX + 1 | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-123119@lists.php.net to get a copy of this message | ||
ID: 44362
User updated by: uwendel at mysql dot com
Reported By: uwendel at mysql dot com
Status: Bogus
Bug Type: PDO related
PHP Version: 5.3CVS-2008-03-07 (CVS)
New Comment:
One out of four issues explained. Three questions still unsanswered.
The bogus explanation covers:
fetchAll(PDO::FETCH_GROUP, -1)
--> (undocumented?) feature
The explanation does not cover:
fetchAll(PDO::FETCH_UNIQUE, -1) --> (??)
fetchAll(PDO::FETCH_UNIQUE, PHP_INT_MAX + 1) --> (overflow?)
fetchAll(PDO::FETCH_GROUP, PHP_INT_MAX + 1) --> (overflow?)
Previous Comments:
------------------------------------------------------------------------
[2008-03-09 17:24:57] iliaa@php.net
Negative offsets carry a special meaning in the case of FETCH_GROUP,
where by the indicate that the data column should be #1
------------------------------------------------------------------------
[2008-03-07 12:57:36] uwendel at mysql dot com
Description:
------------
Under certain circumstances fetchAll ([ int $fetch_style [, int
$column_index [, array $ctor_args ]]] ) seems not to recognize invalid
column index specifications. It seems a bit like an INT overflow to me.
The issue can be observed when using PDO::FETCH_COLUMN together with
another flag like PDO::FETCH_UNIQUE or PDO::FETCH_GROUP.
SELECT id, grp FROM test
-> column indicies are:
id: 0
grp: 1
fetchAll(PDO::FETCH_COLUMN, 2) -> Warning as expected -> OK
fetchAll(PDO::FETCH_COLUMN, -1) -> Warning as expected -> OK
fetchAll(PDO::FETCH_GROUP|PDO::FETCH_COLUMN, -1) -> No warning -> Bug?
fetchAll(PDO::FETCH_GROUP|PDO::FETCH_COLUMN, PHP_INT_MAX + 1) -> No
warning -> Bug?
fetchAll(PDO::FETCH_GROUP|PDO::FETCH_COLUMN, 2) -> Warning -> OK
fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN, -1) -> No warning ->
Bug?
fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN, PHP_INT_MAX + 1) -> No
warning -> Bug?
fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN, 2) -> Warning -> OK
Reproduce code:
---------------
--- example using PDO_MYSQL -------
sapi/cli/php -r '$db = new
PDO("mysql:dbname=phptest;unix_socket=/tmp/mysql.sock", "root",
"root");
$db->exec("DROP TABLE test"); $db->exec("CREATE TABLE test (id INT, grp
CHAR(1))"); $db->exec("INSERT INTO test(id, grp) VALUES (5, \"A\")");
$db->exec("INSERT INTO test(id, grp) VALUES (6, \"B\")"); $stmt =
$db->prepare("SELECT id, grp FROM test ORDER BY id ASC");
$stmt->execute(); var_dump($stmt->fetchAll(PDO::FETCH_COLUMN, -1));
$stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_GROUP|PDO::FETCH_COLUMN, -1));
$stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_GROUP|PDO::FETCH_COLUMN, PHP_INT_MAX
+ 1));'
Warning: PDOStatement::fetchAll(): SQLSTATE[HY000]: General error:
Invalid column index in Command line code on line 1
array(0) {
}
array(2) {
[5]=>
array(1) {
[0]=>
string(1) "A"
}
[6]=>
array(1) {
[0]=>
string(1) "B"
}
}
array(2) {
[5]=>
array(1) {
[0]=>
string(1) "A"
}
[6]=>
array(1) {
[0]=>
string(1) "B"
}
}
---------- example using PDO_SQlite -----------
nixnutz@ulflinux:~/php53_libmysql> sapi/cli/php -r '$db = new
PDO("sqlite:/tmp/foo"); $db->exec("DROP TABLE test");
$db->exec("CREATE
TABLE test (id INT, grp CHAR(1))"); $db->exec("INSERT INTO test(id, grp)
VALUES (5, \"A\")"); $db->exec("INSERT INTO test(id, grp) VALUES (6,
\"B\")"); $stmt = $db->prepare("SELECT id, grp FROM test ORDER BY id
ASC"); $stmt->execute(); var_dump($stmt->fetchAll(PDO::FETCH_COLUMN,
-1)); $stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN, -1));
$stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN,
PHP_INT_MAX + 1)); $stmt->execute();
var_dump($stmt->fetchAll(PDO::FETCH_UNIQUE|PDO::FETCH_COLUMN, 2));'
Warning: PDOStatement::fetchAll(): SQLSTATE[HY000]: General error:
Invalid column index in Command line code on line 1
array(0) {
}
array(2) {
[5]=>
string(1) "A"
[6]=>
string(1) "B"
}
array(2) {
[5]=>
string(1) "A"
[6]=>
string(1) "B"
}
Warning: PDOStatement::fetchAll(): SQLSTATE[HY000]: General error:
Invalid column index in Command line code on line 1
array(0) {
}
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=44362&edit=1