pdpotter commented on issue #44:
URL: https://github.com/apache/incubator-age/issues/44#issuecomment-951881792


   I think I found the source of this issue:
   * For updating existing properties: 
https://github.com/apache/incubator-age/blob/bf35db2982b0e2f71925129513efa822c7b995cb/src/backend/utils/adt/agtype.c#L7404
   * For adding new properties: 
https://github.com/apache/incubator-age/blob/bf35db2982b0e2f71925129513efa822c7b995cb/src/backend/utils/adt/agtype.c#L7424
   
   When `get_ith_agtype_value_from_container(&new_v->root, 0)` is changed to  
`get_ith_agtype_value_from_container(&new_v->root, 1)`, then the second value 
from the list is used:
   ```
   SELECT * FROM cypher('testgraph', $$MATCH (ve:Test {id: 1}) SET ve.a = ['c', 
'd'] return ve$$) as (a agtype);
                                             a                                  
         
   
--------------------------------------------------------------------------------------
    {"id": 1688849860263974, "label": "Test", "properties": {"a": "d", "id": 
1}}::vertex
   (1 row)
   ```
   
   Unfortunately, I can't find how to change these lines to make the complete 
list being assigned to `new_agtype_value_v`.


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