fixing the broken pdo driver in codeigniter 2.2.6

codepot/etc/Makefile.am

@@ -1,6 +1,6 @@
 
 cfgdir=$(CFGDIR)
-cfg_DATA = codepot.ini codepot.mysql codepot.pgsql codepot.a2ldap codepot.httpd
+cfg_DATA = codepot.ini codepot.mysql codepot.pgsql codepot.sqlite codepot.a2ldap codepot.httpd
 cfg_SCRIPTS = start-commit pre-commit post-commit pre-revprop-change post-revprop-change cloc.pl
 
 perldir=$(CFGDIR)/perl/Codepot

codepot/etc/Makefile.in

@@ -260,7 +260,7 @@ top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 wwwdir = @wwwdir@
-cfg_DATA = codepot.ini codepot.mysql codepot.pgsql codepot.a2ldap codepot.httpd
+cfg_DATA = codepot.ini codepot.mysql codepot.pgsql codepot.sqlite codepot.a2ldap codepot.httpd
 cfg_SCRIPTS = start-commit pre-commit post-commit pre-revprop-change post-revprop-change cloc.pl
 perldir = $(CFGDIR)/perl/Codepot
 perl_SCRIPTS = perl/Codepot/AccessHandler.pm perl/Codepot/AuthenHandler.pm

codepot/etc/codepot.ini.in

@@ -11,24 +11,26 @@ default_site_name = "@PACKAGE@"
 ;------------------------------------------------------------------------------
 ; database settings
 ;
-; database_driver: pdo, mysql, mysqli, postgre, oci8
+; database_driver: mysql, mysqli, postgre, oci8, sqlite
 ;
 ; == PDO mysql ==
-; database_hostname = "mysql:host=localhost;dbname=codepot"
+; database_hostname = "localhost"
 ; database_port = ""
 ; database_username = "codepot"
 ; database_password = "codepot"
-; database_name = ""
+; database_name = "codepot"
-; database_driver = "pdo"
+; database_driver = "mysql"
+; database_use_pdo = "yes"
 ; database_prefix = ""
 ;
 ; == PDO sqlite ==
-; database_hostname = "sqlite:/var/lib/codepot/codepot.sqlite"
+; database_hostname = "/var/lib/codepot/codepot.db"
 ; database_port = ""
 ; database_username = ""
 ; database_password = ""
 ; database_name = ""
-; database_driver = "pdo"
+; database_driver = "sqlite"
+; database_use_pdo = "yes"
 ; database_prefix = ""
 ;
 ; == MySQL ==
@@ -38,6 +40,7 @@ default_site_name = "@PACKAGE@"
 ; database_password = "codepot"
 ; database_name = "codepot"
 ; database_driver = "mysql"
+; database_use_pdo = "no"
 ; database_prefix = ""
 ;
 ; == PostgresSQL ==
@@ -47,6 +50,7 @@ default_site_name = "@PACKAGE@"
 ; database_password = "codepot"
 ; database_name = "codepot"
 ; database_driver = "postgre"
+; database_use_pdo = "no"
 ; database_prefix = ""
 ;
 ; == Oracle
@@ -56,6 +60,7 @@ default_site_name = "@PACKAGE@"
 ; database_password = "tiger"
 ; database_name = ""
 ; database_driver = "oci8"
+; database_use_pdo = "no"
 ; database_prefix = "cpot_"
 ;------------------------------------------------------------------------------
 database_hostname = "localhost"
@@ -65,6 +70,7 @@ database_password = ""
 database_name = ""
 database_driver = ""
 database_prefix = ""
+database_use_pdo = "no"
 database_store_gmt = "yes"
 
 ;------------------------------------------------------------------------------

codepot/src/codepot/config/database.php

@@ -37,12 +37,12 @@
 $active_group = "default";
 $active_record = TRUE;
 
-$db['default']['hostname'] = CODEPOT_DATABASE_HOSTNAME;
+$db['default']['hostname'] = CODEPOT_DATABASE_REAL_HOSTNAME;
 $db['default']['port']     = CODEPOT_DATABASE_PORT;
 $db['default']['username'] = CODEPOT_DATABASE_USERNAME;
 $db['default']['password'] = CODEPOT_DATABASE_PASSWORD;
 $db['default']['database'] = CODEPOT_DATABASE_NAME;
-$db['default']['dbdriver'] = CODEPOT_DATABASE_DRIVER;
+$db['default']['dbdriver'] = CODEPOT_DATABASE_REAL_DRIVER;
 $db['default']['dbprefix'] = CODEPOT_DATABASE_PREFIX;
 $db['default']['pconnect'] = FALSE;
 $db['default']['db_debug'] = FALSE;

codepot/src/config.php.in

@@ -61,6 +61,7 @@ function load_ini ($file)
 		array ('database_password',            'string',     ''),
 		array ('database_name',                'string',     ''),
 		array ('database_driver',              'string',     ''),
+		array ('database_use_pdo',             'boolean',    FALSE),
 		array ('database_prefix',              'string',     ''),
 		array ('database_store_gmt',           'boolean',    FALSE),
 
@@ -155,6 +156,38 @@ function load_ini ($file)
 		else define ($const, $x[2]);
 	}
 
+
+	if (CODEPOT_DATABASE_USE_PDO)
+	{
+		// override the hostname for PDO.
+		// this block isn't perfect as it handles translation for a few well known databases.
+		
+		if (CODEPOT_DATABASE_DRIVER == "sqlite")
+		{
+			$hostname = sprintf("sqlite:%s", CODEPOT_DATABASE_HOSTNAME);
+		}
+		elseif (CODEPOT_DATABASE_DRIVER == "postgre")
+		{
+			$hostname = sprintf("pgsql:host=%s;port=%s;dbname=%s", CODEPOT_DATABASE_HOSTNAME, CODEPOT_DATABASE_PORT, CODEPOT_DATABASE_NAME);
+		}
+		elseif (CODEPOT_DATABASE_DRIVER == "mysqli")
+		{
+			$hostname = sprintf("mysql:host=%s;port=%s;dbname=%s", CODEPOT_DATABASE_HOSTNAME, CODEPOT_DATABASE_PORT, CODEPOT_DATABASE_NAME);
+		}
+		else
+		{
+			$hostname = sprintf("%s:host=%s;port=%s;dbname=%s", CODEPOT_DATABASE_DRIVER, CODEPOT_DATABASE_HOSTNAME, CODEPOT_DATABASE_PORT, CODEPOT_DATABASE_NAME);
+		}
+
+		define('CODEPOT_DATABASE_REAL_HOSTNAME', $hostname);
+		define('CODEPOT_DATABASE_REAL_DRIVER', 'pdo');
+	}
+	else
+	{
+		define('CODEPOT_DATABASE_REAL_HOSTNAME', CODEPOT_DATABASE_HOSTNAME);
+		define('CODEPOT_DATABASE_REAL_DRIVER', CODEPOT_DATABASE_DRIVER);
+	}
+
 	return TRUE;
 }
 

codepot/src/system/database/drivers/pdo/pdo_driver.php

@@ -14,6 +14,78 @@
  * @filesource
  */
 
+// HYUNG-HWAN: 
+//  hack against the CodeIgniter's PDO driver bug.
+//  The main driver calls PDOStatement::fetchAll() multiple times over the same instance.
+//  The method returns the empty result set on the second and later calls.
+//  Create this wrapper to cache the result on the first call and return the stored result on later calls.
+class CI_DB_pdo_statement_wrapper
+{
+	private $actual_pdo_statement;
+	private $ever_fetched = false;
+	private $stored_result;
+	private $cursor = -1;
+
+	public function __construct ($pdo_statement)
+	{
+		$this->actual_pdo_statement = $pdo_statement;
+		$this->ever_fetched = false;
+		$this->cursor = 0;
+	}
+
+	public function fetchAll ()
+	{
+		if (!$this->ever_fetched) 
+		{
+			$this->ever_fetched = true;
+			$this->stored_result = $this->actual_pdo_statement->fetchAll(PDO::FETCH_ASSOC);
+		}
+
+		return $this->stored_result;
+	}
+
+	public function fetchObject()
+	{
+		if ($this->ever_fetched)
+		{
+			if ($this->cursor >= count($this->stored_result)) return false;
+			$row = $this->stored_result[$this->cursor];
+			$this->cursor++;
+
+			$obj = new stdClass();
+			foreach ($row as $k => $v) 
+			{
+				//if (!is_numeric($k)) $obj->$k = $row[$k];
+				$obj->$k = $row[$k];
+			}
+
+			return $obj;
+		}
+
+		return $this->actual_pdo_statement->fetchObject();
+	}
+
+	public function fetchAssoc ()
+	{
+		if ($this->ever_fetched)
+		{
+			if ($this->cursor >= count($this->stored_result)) return false;
+			$tmp = $this->stored_result[$this->cursor];
+			$this->cursor++;
+			return $tmp;
+		}
+
+		return $this->actual_pdo_statement->fetch(PDO::FETCH_ASSOC);
+	}
+
+
+	public function __call ($method_name, $arguments) 
+	{
+		$callable = [$this->actual_pdo_statement, $method_name];
+		return call_user_func_array($callable, $arguments);
+	}
+};
+
 // ------------------------------------------------------------------------
 
 /**
@@ -190,7 +262,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	function _execute($sql)
 	{
 		$sql = $this->_prep_query($sql);
-		$result_id = $this->conn_id->prepare($sql);
+		$result_id = new CI_DB_pdo_statement_wrapper($this->conn_id->prepare($sql));
 
 		if (is_object($result_id) && $result_id->execute())
 		{

codepot/src/system/database/drivers/pdo/pdo_result.php

@@ -159,7 +159,8 @@ class CI_DB_pdo_result extends CI_DB_result {
 	 */
 	function _fetch_assoc()
 	{
-		return $this->result_id->fetch(PDO::FETCH_ASSOC);
+		//return $this->result_id->fetch(PDO::FETCH_ASSOC);
+		return $this->result_id->fetchAssoc();  // HYUNG-HWAN: available in CI_DB_pdo_statement_wrapper only 
 	}
 
 	// --------------------------------------------------------------------