added unbuffered_row() to DB_result.php to avoid memory exhausting when dealing with large results.
diff --git a/system/database/DB_result.php b/system/database/DB_result.php
index 196febe..574cd98 100644
--- a/system/database/DB_result.php
+++ b/system/database/DB_result.php
@@ -371,6 +371,24 @@
// --------------------------------------------------------------------
/**
+ * Returns an unbuffered row and move pointer to next row
+ *
+ * @return object
+ */
+ public function unbuffered_row($type = 'object')
+ {
+ if ($type == 'object')
+ {
+ return $this->_fetch_object();
+ } else
+ {
+ return $this->_fetch_assoc();
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* The following functions are normally overloaded by the identically named
* methods in the platform-specific driver -- except when query caching
* is used. When caching is enabled we do not load the other driver.