CapnSpek opened a new issue, #870:
URL: https://github.com/apache/age/issues/870
**Describe the bug**
While evaluating the inequality between an edge and a path, it appears that
the orderability is totally bypassed and true/false is returned based on the
sign of the inequality.
**How are you accessing AGE (Command line, driver, etc.)?**
Command line
**What data setup do we need to do?**
Apache AGE, and any graph with atleast 2 vertices and 1 edge.
...
SELECT * from cypher('my_graph_name', $$
CREATE (:Person {name: 'John'})-[:Knows]->(:Person {name: 'Jonh'})
$$) as (a agtype);
...
```
**What is the necessary configuration info needed?**
Any graph with atleast 2 vertices and 1 edge.
**What is the command that caused the error?**
0
In regards to orderability between different agtypes: -
https://age.apache.org/age-manual/master/intro/comparability.html
I was testing the orderability between path and an edge, and I found this
odd behavior: -
Comparing a path with an edge with p > e inequality: -
test=# SELECT *
FROM cypher('test', $$
WITH [{id: 0, label: "label_name_1", properties: {i: 0}}::vertex,
{id: 2, start_id: 0, end_id: 1, label: "edge_label", properties:
{i: 0}}::edge,
{id: 1, label: "label_name_2", properties: {}}::vertex
]::path as p
MATCH (n)-[e]-(m) RETURN p>e
$$) AS (e agtype);
e
------
true
true
true
true
(4 rows)
Fair enough, same result holds when we compare it with p < e inequality
test=# SELECT *
FROM cypher('test', $$
WITH [{id: 0, label: "label_name_1", properties: {i: 0}}::vertex,
{id: 2, start_id: 0, end_id: 1, label: "edge_label", properties:
{i: 0}}::edge,
{id: 1, label: "label_name_2", properties: {}}::vertex
]::path as p
MATCH (n)-[e]-(m) RETURN p<e
$$) AS (e agtype);
e
-------
false
false
false
false
(4 rows)
But look, when we change the inequality to e > p
test=# SELECT *
FROM cypher('test', $$
WITH [{id: 0, label: "label_name_1", properties: {i: 0}}::vertex,
{id: 2, start_id: 0, end_id: 1, label: "edge_label", properties:
{i: 0}}::edge,
{id: 1, label: "label_name_2", properties: {}}::vertex
]::path as p
MATCH (n)-[e]-(m) RETURN e>p
$$) AS (e agtype);
e
------
true
true
true
true
(4 rows)
We get true again, which is in direct contradiction to p > e inequality
And when we check for e < p, we get false again
test=# SELECT *
FROM cypher('test', $$
WITH [{id: 0, label: "label_name_1", properties: {i: 0}}::vertex,
{id: 2, start_id: 0, end_id: 1, label: "edge_label", properties:
{i: 0}}::edge,
{id: 1, label: "label_name_2", properties: {}}::vertex
]::path as p
MATCH (n)-[e]-(m) RETURN e<p
$$) AS (e agtype);
e
-------
false
false
false
false
(4 rows)
Again, in direct contradiction to the first 2 results.
**Expected behavior**
Would have expected p>e to be true under all scenarios.
**Environment (please complete the following information):**
- Version: [age 1.3.0]
**Additional context**
-
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