#29476 [Asn->Csd]: sqlite_fetch_column_types locks the database forever

From: Date: Tue, 18 Apr 2006 14:30:42 +0000
Subject: #29476 [Asn->Csd]: sqlite_fetch_column_types locks the database forever
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-95937@lists.php.net to get a copy of this message
 ID:               29476
 Updated by:       iliaa@php.net
 Reported By:      hugo_pl at users dot sourceforge dot net
-Status:           Assigned
+Status:           Closed
 Bug Type:         SQLite related
 Operating System: *
 PHP Version:      5.1.3RC3
 Assigned To:      iliaa
 New Comment:

This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.




Previous Comments:
------------------------------------------------------------------------

[2006-04-11 11:52:24] sniper@php.net

Assigned to sqlite guru Ilia.

------------------------------------------------------------------------

[2006-04-09 00:10:09] nforbes@php.net

Same error with 5.1.2 (release). However, on 5.1.3-dev, 
the script simply hangs. Tested using the above, posted by 
jwellis.

------------------------------------------------------------------------

[2005-11-18 16:07:22] jwellis at carlalbert dot edu

This is still a problem in PHP 5.1.0RC5-dev.

here is my reproduction code:

----------------------------
$database_path = "sqlite_db1";
$db = new SQLiteDatabase($database_path);
//  sqlite_db1 has a table called t1 with the colums id (int) and stuff
(text)  //

$db->query("INSERT INTO t1 (stuff) VALUES ('something');", SQLITE_NUM,
$db_error);
print $db->changes() ." rows affected<br>\n";

//-----//  This is the part that breaks it  //-----//
$table_cols = $db->fetchColumnTypes("t1", SQLITE_ASSOC); 
foreach($table_cols as $col => $type) {
	print"\t$col: $type<br>\n";
}
//-------------------------------------------------//

$db->query("INSERT INTO t1 (stuff) VALUES ('something');", SQLITE_NUM,
$db_error);
print $db->changes() ." rows affected<br>\n";

------------------------------------------------------------------------

[2005-03-06 22:09:42] sniper@php.net

Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip



------------------------------------------------------------------------

[2004-08-25 06:56:48] hugo_pl at users dot sourceforge dot net

Hi 
 
I think that this is a PHP bug, I made a better exemple to 
show this bug: 
 
<pre> 
<?php 
 
try { 
	$db = new SQLiteDatabase('./test.db'); 
	$db->busyTimeout(1000); 
	 
	// table exists? 
	$exists = $db->singleQuery('SELECT count(*) FROM 
sqlite_master WHERE tbl_name=\'bugtest\''); 
	if (!$exists) 
		$db->query('CREATE TABLE bugtest (a, b, c, 
d);'); 
	 
	// Without this line all runs Ok. 
	$db->fetchColumnTypes('bugtest'); 
 
	$db->query('INSERT INTO bugtest VALUES (1, 2, 3, 
4)'); 
	 
	 
	echo 'Res: <br>'; 
	print_r( $db->arrayQuery('SELECT * FROM bugtest', 
SQLITE_ASSOC) ); 
} 
catch (Exception $e) 
{ 
	echo 'Exception: ', $e->getMessage(); 
} 
 
 
?> 
 
The first time you run this script all appear to be Ok... 
the insert query is executed, etc... but the second time 
is displayed a message:  
 
Warning:  SQLiteDatabase::query() [function.query]: 
database is locked in /home/hugo/public_html/phpbug.php on 
line 16 
 
Nothing is wrong with the script, if this message appear 
something is wrong with PHP.... on windows the same bug 
occur, then it is not a problem from SQLite or Apache 
compiled by me under linux.

------------------------------------------------------------------------

The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
    http://bugs.php.net/29476

-- 
Edit this bug report at http://bugs.php.net/?id=29476&edit=1


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