From e99cabbbc6c1697db3fd8869f75c002a5a28a5dc Mon Sep 17 00:00:00 2001
From: Ville Brofeldt <ville.brofeldt@iki.fi>
Date: Tue, 21 May 2019 17:20:36 +0300
Subject: [PATCH] Add epoch funcs for BigQuery

---
 superset/db_engine_specs.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/superset/db_engine_specs.py b/superset/db_engine_specs.py
index 35a591fa10202..6b8e702745510 100644
--- a/superset/db_engine_specs.py
+++ b/superset/db_engine_specs.py
@@ -1957,6 +1957,14 @@ def _get_fields(cls, cols):
         return [sqla.literal_column(c.get('name')).label(c.get('name').replace('.', '__'))
                 for c in cols]
 
+    @classmethod
+    def epoch_to_dttm(cls):
+        return 'TIMESTAMP_SECONDS({col})'
+
+    @classmethod
+    def epoch_ms_to_dttm(cls):
+        return 'TIMESTAMP_MILLIS({col})'
+
 
 class ImpalaEngineSpec(BaseEngineSpec):
     """Engine spec for Cloudera's Impala"""