jrgemignani commented on PR #2303:
URL: https://github.com/apache/age/pull/2303#issuecomment-3741357175
@MuhammadTahaNaveed
**Current master branch**
```
psql-17.4-5432-pgsql=# SELECT create_graph('bug_demo');
NOTICE: graph "bug_demo" has been created
create_graph
--------------
(1 row)
psql-17.4-5432-pgsql=# SELECT * FROM cypher('bug_demo', $$ CREATE (:Person
{name: 'Alice'}) $$) AS (v agtype);
v
---
(0 rows)
psql-17.4-5432-pgsql=# SELECT * FROM cypher('bug_demo', $$ CREATE (:Person
{name: 'Bob'}) $$) AS (v agtype);
v
---
(0 rows)
psql-17.4-5432-pgsql=# SELECT * FROM cypher('bug_demo', $$
psql-17.4-5432-pgsql$# MATCH (a:Person), (b:Person)
psql-17.4-5432-pgsql$# WHERE a IN [a, b]
psql-17.4-5432-pgsql$# RETURN a.name
psql-17.4-5432-pgsql$# $$) AS (name agtype);
name
---------
"Alice"
"Alice"
"Bob"
"Bob"
(4 rows)
```
**PR 2303**
```
psql-17.7-5432-pgsql=# SELECT create_graph('bug_demo');
SELECT * FROM cypher('bug_demo', $$ CREATE (:Person {name: 'Alice'}) $$) AS
(v agtype);
SELECT * FROM cypher('bug_demo', $$ CREATE (:Person {name: 'Bob'}) $$) AS (v
agtype);
SELECT * FROM cypher('bug_demo', $$
MATCH (a:Person), (b:Person)
WHERE a IN [a, b]
RETURN a.name
$$) AS (name agtype);
NOTICE: graph "bug_demo" has been created
create_graph
--------------
(1 row)
v
---
(0 rows)
v
---
(0 rows)
ERROR: operator is not unique: vertex = vertex
LINE 3: WHERE a IN [a, b]
^
HINT: Could not choose a best candidate operator. You might need to add
explicit type casts.
```
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