From: eprayner at gmail dot com
Operating system: Linux
PHP version: 5.2SVN-2009-08-27 (SVN)
PHP Bug Type: PDO related
Bug description: PDO mysql prepare incorrectly quoting
Description:
------------
When using PDO prepare for mysql, quotes are incorrectly inserted around
column names, resulting in errors or unexpected results. This problem
would have been _much_ easier to diagonise if there was a way of seeing the
actual statement. Something like:
$string PDOStatement::executeString()---returns the statement that would
have been executed by PDOStatement::execute().
Reproduce code:
---------------
//given a mysql connection $pdo
//and a database table 'myTable' with columns: id, col1, col2, col3
//with a row: 1, value1, value2, value3.
$stmt=$pdo->prepare("SELECT ? FROM myTable WHERE id=?");
$myColumn = 'col1';
$stmt->execute(array($myColumn, 1));
$row=$stmt->fetch();
print_r($row);
Expected result:
----------------
I'd expect to see: "value1" displayed, as you'd expect for the statement:
"SELECT col1 FROM myTable WHERE id=1"
Actual result:
--------------
What is displayed is: "col1", as you'd expect for the statement:
"SELECT 'col1' FROM myTable WHERE id=1"
Other statements result in errors. Example:
$stmt=$pdo->prepare("UPDATE myTable SET ?=? WHERE id=?");
$stmt->execute(array($myColumn, $myValue, $myId));
is a syntax error, as is the SQL:
UPDATE myTable SET 'col1'=3 WHERE id=1;
This problem means that I cant use prepare and execute statements at all.
--
Edit bug report at http://bugs.php.net/?id=49381&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=49381&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=49381&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=49381&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=49381&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=49381&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=49381&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=49381&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=49381&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=49381&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=49381&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=49381&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=49381&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=49381&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=49381&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49381&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=49381&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=49381&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=49381&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=49381&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=49381&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=49381&r=mysqlcfg
