diff --git a/bqx/func.py b/bqx/func.py
index 609d462..8214c22 100644
--- a/bqx/func.py
+++ b/bqx/func.py
@@ -28,3 +28,6 @@ def _actual_n(col):
 SQRT = _fn_factory('SQRT')
 IF = _fn_factory('IF')
 POW = _fn_factory('POW')
+LEFT = _fn_factory('LEFT')
+RIGHT = _fn_factory('RIGHT')
+FORMAT_UTC_USEC = _fn_factory('FORMAT_UTC_USEC')