From d37cc89511447d3237643d0da268d7b7f73dd659 Mon Sep 17 00:00:00 2001
From: Sander Roosendaal <roosendaalsander@gmail.com>
Date: Mon, 1 Mar 2021 08:21:13 +0100
Subject: [PATCH] fix

---
 rowers/dataprep.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index b8ed1b36..4aa48fec 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -2531,6 +2531,8 @@ def read_cols_df_sql(ids, columns, convertnewtons=True):
     columns = list(set(columns))
     ids = [int(id) for id in ids]
 
+    df = pd.DataFrame({})
+
 
     if len(ids) == 0:
         return pd.DataFrame(),extracols