Add a note to the num_rows() documentation
diff --git a/user_guide_src/source/database/results.rst b/user_guide_src/source/database/results.rst
index 4f93c79..90d2efc 100644
--- a/user_guide_src/source/database/results.rst
+++ b/user_guide_src/source/database/results.rst
@@ -150,6 +150,12 @@
echo $query->num_rows();
+..note::
+ Not all database drivers have a native way of getting the total
+ number of rows for a result set. When this is the case, all of
+ the data is prefetched and count() is manually called on the
+ resulting array in order to achieve the same functionality.
+
$query->num_fields()
=====================
@@ -182,5 +188,4 @@
$row = $query2->row();
echo $row->name;
- $query2->free_result();// The $query2 result object will no longer be available
-
+ $query2->free_result(); // The $query2 result object will no longer be available