in db/postgresql_scanner.py [0:0]
def check_result(self, result):
"""Converts any non-primitive types in the resultset to JSON strings.
Args:
result: Query result set
Returns:
Updated results set
"""
res = []
for i, item in enumerate(result):
if isinstance(item, list):
res.append(json.dumps(item))
else:
res.append(result[i])
return res