jrgemignani commented on issue #1837:
URL: https://github.com/apache/age/issues/1837#issuecomment-2207356787
@dhilst This issue is that you aren't creating a vlabel for the label you
are importing from the CSV. Note how the regression tests do the load -
```
SELECT create_graph('agload_test_graph');
SELECT create_vlabel('agload_test_graph','Country');
SELECT load_labels_from_file('agload_test_graph', 'Country',
'age_load/countries.csv');
SELECT create_vlabel('agload_test_graph','City');
SELECT load_labels_from_file('agload_test_graph', 'City',
'age_load/cities.csv');
SELECT create_elabel('agload_test_graph','has_city');
SELECT load_edges_from_file('agload_test_graph', 'has_city',
'age_load/edges.csv');
```
If applied to your issue -
```
psql-16.2-5432-psql=# drop extension age; create extension age; load 'age';
set search_path TO ag_catalog;
DROP EXTENSION
CREATE EXTENSION
LOAD
SET
psql-16.2-5432-psql=# select create_graph('test_graph');
NOTICE: graph "test_graph" has been created
create_graph
--------------
(1 row)
psql-16.2-5432-psql=# select load_labels_from_file('test_graph', 'Cities',
'/home/jgemignani/POSTGRESQL/cities.csv');
ERROR: label_id must be 1 .. 65535
psql-16.2-5432-psql=# SELECT create_vlabel('test_graph','Cities');
NOTICE: VLabel "Cities" has been created
create_vlabel
---------------
(1 row)
psql-16.2-5432-psql=# select load_labels_from_file('test_graph', 'Cities',
'/home/jgemignani/POSTGRESQL/cities.csv');
load_labels_from_file
-----------------------
(1 row)
psql-16.2-5432-psql=#
```
The issue is that the label you are importing the vertices or edges into,
doesn't exist.
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