[ci skip] Fix 4953
diff --git a/system/database/DB_forge.php b/system/database/DB_forge.php
index 2b2ff1c..7289235 100644
--- a/system/database/DB_forge.php
+++ b/system/database/DB_forge.php
@@ -348,7 +348,7 @@
if (($result = $this->db->query($sql)) !== FALSE)
{
- empty($this->db->data_cache['table_names']) OR $this->db->data_cache['table_names'][] = $table;
+ isset($this->db->data_cache['table_names']) && $this->db->data_cache['table_names'][] = $table;
// Most databases don't support creating indexes from within the CREATE TABLE statement
if ( ! empty($this->keys))