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-rw-r--r--wqflask/base/data_set.py3
1 files changed, 2 insertions, 1 deletions
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))