From 9cd9b91412734f8f084439690082f9e699ebd89e Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Mon, 12 Sep 2022 07:42:24 +0300
Subject: Fix query: Add comma to separate columns.

---
 wqflask/base/data_set.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wqflask/base/data_set.py b/wqflask/base/data_set.py
index 02e6cefe..9685e33e 100644
--- a/wqflask/base/data_set.py
+++ b/wqflask/base/data_set.py
@@ -784,7 +784,8 @@ class DataSet:
                     else:
                         query = "SELECT {}.Name".format(escape(dataset_type))
                     data_start_pos = 1
-                    query += ', '.join(temp)
+                    if len(temp) > 0:
+                        query = query + ", " + ', '.join(temp)
                     query += ' FROM ({}, {}XRef, {}Freeze) '.format(*mescape(dataset_type,
                                                                              self.type,
                                                                              self.type))
-- 
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