diff --git a/dibi/libs/DibiDataSource.php b/dibi/libs/DibiDataSource.php
index f2a16ad2..97ded096 100644
--- a/dibi/libs/DibiDataSource.php
+++ b/dibi/libs/DibiDataSource.php
@@ -247,6 +247,17 @@ class DibiDataSource extends DibiObject implements IDataSource
 
 
 
+	/**
+	 * Discards the internal cache.
+	 * @return void
+	 */
+	public function release()
+	{
+		$this->result = $this->count = NULL;
+	}
+
+
+
 	/********************* exporting ****************d*g**/
 
 
diff --git a/dibi/libs/DibiResult.php b/dibi/libs/DibiResult.php
index 16adcb3d..b80e13fe 100644
--- a/dibi/libs/DibiResult.php
+++ b/dibi/libs/DibiResult.php
@@ -535,7 +535,7 @@ class DibiResult extends DibiObject implements IDataSource
 	{
 		$cols = array();
 		foreach ($this->getMeta() as $info) {
-			$cols[] = new DibiColumnInfo($this->driver, $info);
+			$cols[] = new DibiColumnInfo($this->getDriver(), $info);
 		}
 		return $cols;
 	}
@@ -626,7 +626,7 @@ class DibiResult extends DibiObject implements IDataSource
 	private function getDriver()
 	{
 		if ($this->driver === NULL) {
-			throw new InvalidStateException('Resultset was released from memory.');
+			throw new InvalidStateException('Result-set was released from memory.');
 		}
 
 		return $this->driver;