Bug: load_edges_from_file Fails to Import Single Property from CSV

When loading edges from a CSV file using load_edges_from_file, any single property included in the file is not added to the edge’s properties in Apache AGE.

🔧 Command Used

SELECT load_edges_from_file(
  'test_graph',
  'has_city',
  '/home/munmud/Desktop/pg_new_installation/src/dataset/edges_sample.csv'
);

CSV files data

start_id,start_vertex_type,end_id,end_vertex_type,new_field
153,City,3,Country,new_data
154,City,3,Country,new_data

Result

edges

{"id": 1407374883553281, "label": "has_city", "end_id": 1125899906842627, "start_id": 844424930132121, "properties": {}}::edge
(1 row)

✅ Expected Behavior

The edge should include the single property from the CSV in the properties object, like so:

"properties": {"new_field": "new_data"}