jrgemignani commented on issue #1629:
URL: https://github.com/apache/age/issues/1629#issuecomment-1971933158
@MironAtHome I think your misunderstanding with **OPTIONAL MATCH** is with
how **MATCH** works with **patterns**. **OPTIONAL** **MATCH** and **MATCH**
process **patterns** in the same way. Using your above graph of one vertex, if
you execute the following command, you will get no matches -
```
psql-16.1-5432-pgsql=# SELECT * FROM cypher('test_graph', $$ MATCH
(a:vertice1), (b:vertice2) RETURN a, b $$) AS (a agtype, b agtype);
a | b
---+---
(0 rows)
psql-16.1-5432-pgsql=#
```
Note that MATCH returned nothing with the **pattern** `(a:vertice1),
(b:vertice2)`. This is expected because both patterns do not exist, only one
does. That is why **OPTIONAL MATCH** returned nothing.
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