From 404a2fddd61d9ee2f4b33f51aa267083d2c6a8ee Mon Sep 17 00:00:00 2001
From: Yuxuan Zhuge <zhuge@yahoo-inc.com>
Date: Mon, 23 May 2016 15:35:53 -0700
Subject: [PATCH] db version bug walkaround

---
 .../422116f431b7_add_d_timestamp_format_for_tables.py  | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py b/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
index f96a20bdee1..6bf33562dc6 100644
--- a/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
+++ b/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
@@ -15,8 +15,14 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.add_column('tables', sa.Column('timestamp_format', sa.String(length=256), nullable=True))
+	try:
+		op.add_column('tables', sa.Column('timestamp_format', sa.String(length=256), nullable=True))
+	except Exception:
+		pass
 
 
 def downgrade():
-    op.drop_column('tables', 'timestamp_format')
+	try:
+		op.drop_column('tables', 'timestamp_format')
+	except Exception:
+		pass