When it executes VLE(Variable Length Edge) query, why it unable to find the data in the database.

[ToLboo]

I am experiencing a similar issue with . Whenever I run the following query:

SELECT * FROM cypher('multi_in_1_graph', $$ MATCH (cs:CLOSED_SHELL {id: 32722, file_name: "Jaguar_E_Type_roadster"})-[*1..3]->(el:EDGE_LOOP) RETURN el.id AS id, el $$) AS (id integer, el agtype);

It always throws the following error on the first execution:

SQL state: XX000

Subsequent executions do not throw this error but always return empty results. However, when I run this query:

SELECT * FROM cypher('multi_in_1_graph', $$ MATCH (cs:CLOSED_SHELL {id: 32722, file_name: "Jaguar_E_Type_roadster"})-[]->()-[]->()-[]->(el:EDGE_LOOP) RETURN el.id AS id, el $$) AS (id integer, el agtype);

It successfully retrieves valid results.

Could you please help me understand why this is happening and how to resolve the issue?

[MuhammadTahaNaveed]

@ToLboo Can you please share the following information neccessary for me to reproduce the issue

• AGE version
• PostgreSQL version
• What data setup do we need to do?

[ToLboo]

Thank you for your reply！
My PG version is 15.8 (Ubuntu15.8.1 - pgdg22.04+1)，age version is 15.0.
I think you can reproduce the issue on any data. If not, you can use the following edge table and node table in CSV format.
G_010101.zip

[Mocuto]

Also experiencing this issue, running apache age for PG12 cloned from latest master branch.

[ToLboo]

@Mocuto Is the problem solved now?

[MuhammadTahaNaveed]

Hi @ToLboo,

I have tried reproducing the issue, but am unable to. Could you provide me the complete error message?

psql (15.8)
Type "help" for help.

issue_2148=# CREATE EXTENSION age; SET search_path=ag_catalog;
CREATE EXTENSION
SET

issue_2148=# \dx age
             List of installed extensions
 Name | Version |   Schema   |      Description       
------+---------+------------+------------------------
 age  | 1.5.0   | ag_catalog | AGE database extension
(1 row)

issue_2148=# SELECT create_graph('graph');
NOTICE:  graph "graph" has been created
 create_graph 
--------------
 
(1 row)

issue_2148=# SELECT create_vlabel('graph', 'ADVANCED_FACE');
NOTICE:  VLabel "ADVANCED_FACE" has been created
 create_vlabel 
---------------
 
(1 row)

issue_2148=# SELECT create_vlabel('graph', 'CLOSED_SHELL');
NOTICE:  VLabel "CLOSED_SHELL" has been created
 create_vlabel 
---------------
 
(1 row)

issue_2148=# SELECT create_vlabel('graph', 'EDGE_LOOP');
NOTICE:  VLabel "EDGE_LOOP" has been created
 create_vlabel 
---------------
 
(1 row)

issue_2148=# SELECT create_vlabel('graph', 'FACE_BOUND');
NOTICE:  VLabel "FACE_BOUND" has been created
 create_vlabel 
---------------
 
(1 row)

issue_2148=# SELECT load_labels_from_file('graph', 'ADVANCED_FACE', '/path/to/G_010101/G_010101_Front_Floor_Asy/vertex/ADVANCED_FACE.csv');
 load_labels_from_file 
-----------------------
 
(1 row)

issue_2148=# SELECT load_labels_from_file('graph', 'CLOSED_SHELL', '/path/to/G_010101/G_010101_Front_Floor_Asy/vertex/CLOSED_SHELL.csv');
 load_labels_from_file 
-----------------------
 
(1 row)

issue_2148=# SELECT load_labels_from_file('graph', 'EDGE_LOOP', '/path/to/G_010101/G_010101_Front_Floor_Asy/vertex/EDGE_LOOP.csv');
 load_labels_from_file 
-----------------------
 
(1 row)

issue_2148=# SELECT load_labels_from_file('graph', 'FACE_BOUND', '/path/to/G_010101/G_010101_Front_Floor_Asy/vertex/FACE_BOUND.csv');
 load_labels_from_file 
-----------------------
 
(1 row)

issue_2148=# SELECT create_elabel('graph', 'E_ADVANCED_FACE_2_FACE_BOUND');
NOTICE:  ELabel "E_ADVANCED_FACE_2_FACE_BOUND" has been created
 create_elabel 
---------------
 
(1 row)

issue_2148=# SELECT create_elabel('graph', 'E_CLOSED_SHELL_2_ADVANCED_FACE');
NOTICE:  ELabel "E_CLOSED_SHELL_2_ADVANCED_FACE" has been created
 create_elabel 
---------------
 
(1 row)

issue_2148=# SELECT create_elabel('graph', 'E_FACE_BOUND_2_EDGE_LOOP');
NOTICE:  ELabel "E_FACE_BOUND_2_EDGE_LOOP" has been created
 create_elabel 
---------------
 
(1 row)

issue_2148=# SELECT load_edges_from_file('graph', 'E_ADVANCED_FACE_2_FACE_BOUND', '/path/to/G_010101/G_010101_Front_Floor_Asy/edges/E_ADVANCED_FACE_2_FACE_BOUND.csv');
 load_edges_from_file 
----------------------
 
(1 row)

issue_2148=# SELECT load_edges_from_file('graph', 'E_CLOSED_SHELL_2_ADVANCED_FACE', '/path/to/G_010101/G_010101_Front_Floor_Asy/edges/E_CLOSED_SHELL_2_ADVANCED_FACE.csv');
 load_edges_from_file 
----------------------
 
(1 row)

issue_2148=# SELECT load_edges_from_file('graph', 'E_FACE_BOUND_2_EDGE_LOOP', '/path/to/G_010101/G_010101_Front_Floor_Asy/edges/E_FACE_BOUND_2_EDGE_LOOP.csv');
 load_edges_from_file 
----------------------
 
(1 row)

issue_2148=# SELECT * FROM cypher('graph', $$ MATCH (cs:CLOSED_SHELL {id: "26", file_name: "010101_Front_Floor_Asy"})-[*1..3]->(el:EDGE_LOOP) RETURN el.id AS id, el $$) AS (id integer, el agtype);
  id  |                                                                                                                                                           el                          
                                                                                                                                 
------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
   29 | {"id": 1407374883553309, "label": "EDGE_LOOP", "properties": {"id": "29", "ids": "[30,228,341,446]", "name": "''", "__id__": 29, "belong": "010101_Front_Floor_Asy.stp0000000000001220
", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "30,228,341,446"}}::vertex
  468 | {"id": 1407374883553748, "label": "EDGE_LOOP", "properties": {"id": "468", "ids": "[469,470,568,569]", "name": "''", "__id__": 468, "belong": "010101_Front_Floor_Asy.stp0000000000001
220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "469,470,568,569"}}::vertex
  669 | {"id": 1407374883553949, "label": "EDGE_LOOP", "properties": {"id": "669", "ids": "[670,831]", "name": "''", "__id__": 669, "belong": "010101_Front_Floor_Asy.stp0000000000001220", "f
ile_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "670,831"}}::vertex
  989 | {"id": 1407374883554269, "label": "EDGE_LOOP", "properties": {"id": "989", "ids": "[990,991]", "name": "''", "__id__": 989, "belong": "010101_Front_Floor_Asy.stp0000000000001220", "f
ile_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "990,991"}}::vertex
  994 | {"id": 1407374883554274, "label": "EDGE_LOOP", "properties": {"id": "994", "ids": "[995,1087,1107,1108]", "name": "''", "__id__": 994, "belong": "010101_Front_Floor_Asy.stp0000000000
001220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "995,1087,1107,1108"}}::vertex
 1130 | {"id": 1407374883554410, "label": "EDGE_LOOP", "properties": {"id": "1130", "ids": "[1131,1132]", "name": "''", "__id__": 1130, "belong": "010101_Front_Floor_Asy.stp0000000000001220"
, "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1131,1132"}}::vertex
 1208 | {"id": 1407374883554488, "label": "EDGE_LOOP", "properties": {"id": "1208", "ids": "[1209,1210]", "name": "''", "__id__": 1208, "belong": "010101_Front_Floor_Asy.stp0000000000001220"
, "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1209,1210"}}::vertex
 1213 | {"id": 1407374883554493, "label": "EDGE_LOOP", "properties": {"id": "1213", "ids": "[1214,1215,1216,1217]", "name": "''", "__id__": 1213, "belong": "010101_Front_Floor_Asy.stp0000000
000001220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1214,1215,1216,1217"}}::vertex
(8 rows)

issue_2148=# SELECT * FROM cypher('graph', $$ MATCH (cs:CLOSED_SHELL {id: "26", file_name: "010101_Front_Floor_Asy"})-[]->()-[]->()-[]->(el:EDGE_LOOP) RETURN el.id AS id, el $$) AS (id integer, el agtype);
  id  |                                                                                                                                                           el                          
                                                                                                                                 
------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------
   29 | {"id": 1407374883553309, "label": "EDGE_LOOP", "properties": {"id": "29", "ids": "[30,228,341,446]", "name": "''", "__id__": 29, "belong": "010101_Front_Floor_Asy.stp0000000000001220
", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "30,228,341,446"}}::vertex
  468 | {"id": 1407374883553748, "label": "EDGE_LOOP", "properties": {"id": "468", "ids": "[469,470,568,569]", "name": "''", "__id__": 468, "belong": "010101_Front_Floor_Asy.stp0000000000001
220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "469,470,568,569"}}::vertex
  669 | {"id": 1407374883553949, "label": "EDGE_LOOP", "properties": {"id": "669", "ids": "[670,831]", "name": "''", "__id__": 669, "belong": "010101_Front_Floor_Asy.stp0000000000001220", "f
ile_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "670,831"}}::vertex
  989 | {"id": 1407374883554269, "label": "EDGE_LOOP", "properties": {"id": "989", "ids": "[990,991]", "name": "''", "__id__": 989, "belong": "010101_Front_Floor_Asy.stp0000000000001220", "f
ile_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "990,991"}}::vertex
  994 | {"id": 1407374883554274, "label": "EDGE_LOOP", "properties": {"id": "994", "ids": "[995,1087,1107,1108]", "name": "''", "__id__": 994, "belong": "010101_Front_Floor_Asy.stp0000000000
001220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "995,1087,1107,1108"}}::vertex
 1130 | {"id": 1407374883554410, "label": "EDGE_LOOP", "properties": {"id": "1130", "ids": "[1131,1132]", "name": "''", "__id__": 1130, "belong": "010101_Front_Floor_Asy.stp0000000000001220"
, "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1131,1132"}}::vertex
 1208 | {"id": 1407374883554488, "label": "EDGE_LOOP", "properties": {"id": "1208", "ids": "[1209,1210]", "name": "''", "__id__": 1208, "belong": "010101_Front_Floor_Asy.stp0000000000001220"
, "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1209,1210"}}::vertex
 1213 | {"id": 1407374883554493, "label": "EDGE_LOOP", "properties": {"id": "1213", "ids": "[1214,1215,1216,1217]", "name": "''", "__id__": 1213, "belong": "010101_Front_Floor_Asy.stp0000000
000001220", "file_name": "010101_Front_Floor_Asy", "entity_type": "EDGE_LOOP", "related_entity": "1214,1215,1216,1217"}}::vertex
(8 rows)