[ci skip] Merge pull request #5150 from ytetsuro/add-oracle-rename-column-to-keyword

Fix DBForge triggering ORA-00946 while renaming columns
diff --git a/system/database/drivers/oci8/oci8_forge.php b/system/database/drivers/oci8/oci8_forge.php
index 867a943..724a76d 100644
--- a/system/database/drivers/oci8/oci8_forge.php
+++ b/system/database/drivers/oci8/oci8_forge.php
@@ -124,7 +124,7 @@
 				if ($alter_type === 'MODIFY' && ! empty($field[$i]['new_name']))
 				{
 					$sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
-						.' '.$this->db->escape_identifiers($field[$i]['new_name']);
+						.' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
 				}
 
 				$field[$i] = "\n\t".$field[$i]['_literal'];