diff --git a/dibi/drivers/postgre.php b/dibi/drivers/postgre.php
index 2cdd570a..88663437 100644
--- a/dibi/drivers/postgre.php
+++ b/dibi/drivers/postgre.php
@@ -89,7 +89,7 @@ class DibiPostgreDriver extends DibiObject implements IDibiDriver
 		}
 
 		DibiDriverException::tryError();
-		if (isset($config['persistent'])) {
+		if (empty($config['persistent'])) {
 			$this->connection = pg_connect($string, PGSQL_CONNECT_FORCE_NEW);
 		} else {
 			$this->connection = pg_pconnect($string, PGSQL_CONNECT_FORCE_NEW);
diff --git a/dibi/libs/DibiResult.php b/dibi/libs/DibiResult.php
index caa791d4..0f57ac31 100644
--- a/dibi/libs/DibiResult.php
+++ b/dibi/libs/DibiResult.php
@@ -304,7 +304,8 @@ class DibiResult extends DibiObject implements IDataSource
 
 		// check columns
 		foreach ($assoc as $as) {
-			if ($as !== '#' && $as !== '=' && $as !== '@' && !array_key_exists($as, $row)) {
+			// offsetExists ignores NULL in PHP 5.2.1, isset() surprisingly NULL accepts
+			if ($as !== '#' && $as !== '=' && $as !== '@' && !isset($row[$as])) {
 				throw new InvalidArgumentException("Unknown column '$as' in associative descriptor.");
 			}
 		}
@@ -407,7 +408,7 @@ class DibiResult extends DibiObject implements IDataSource
 			$value = $tmp[1];
 
 		} else {
-			if (!array_key_exists($value, $row)) {
+			if (!isset($row[$value])) {
 				throw new InvalidArgumentException("Unknown value column '$value'.");
 			}
 
@@ -418,7 +419,7 @@ class DibiResult extends DibiObject implements IDataSource
 				return $data;
 			}
 
-			if (!array_key_exists($key, $row)) {
+			if (!isset($row[$key])) {
 				throw new InvalidArgumentException("Unknown key column '$key'.");
 			}
 		}
diff --git a/dibi/libs/DibiTable.php b/dibi/libs/DibiTable.php
index b28e1929..34f3e0b3 100644
--- a/dibi/libs/DibiTable.php
+++ b/dibi/libs/DibiTable.php
@@ -358,4 +358,53 @@ abstract class DibiTable extends DibiObject
 		return $this->command()->__call('select', $args)->from($this->name);
 	}
 
+
+
+	/********************* magic fetching ****************d*g**/
+
+
+
+	/**
+	 * Magic fetch.
+	 * - $row = $model->fetchByUrl('about-us');
+	 * - $arr = $model->fetchAllByCategoryIdAndVisibility(5, TRUE);
+	 *
+	 * @param  string
+	 * @param  array
+	 * @return DibiRow|array
+	 */
+	public function __call($name, $args)
+	{
+		if (strncmp($name, 'fetchBy', 7) === 0) { // single row
+			$single = TRUE;
+			$name = substr($name, 7);
+
+		} elseif (strncmp($name, 'fetchAllBy', 10) === 0) { // multi row
+			$name = substr($name, 10);
+
+		} else {
+			parent::__call($name, $args);
+		}
+
+		// ProductIdAndTitle -> array('product', 'title')
+		$parts = explode('_and_', strtolower(preg_replace('#(.)(?=[A-Z])#', '$1_', $name)));
+
+		if (count($parts) !== count($args)) {
+			throw new InvalidArgumentException("Magic fetch expects " . count($parts) . " parameters, but " . count($args) . " was given.");
+		}
+
+		if (isset($single)) {
+			return $this->complete($this->connection->query(
+				'SELECT * FROM %n', $this->name,
+				'WHERE %and', array_combine($parts, $args),
+				'LIMIT 1'
+			))->fetch();
+		} else {
+			return $this->complete($this->connection->query(
+				'SELECT * FROM %n', $this->name,
+				'WHERE %and', array_combine($parts, $args)
+			))->fetchAll();
+		}
+	}
+
 }