Multi-row CREATE followed by startNode/endNode reports a nonexistent graphid

[YGY-001]

Environment

• Apache AGE 1.8.0
• PostgreSQL 18.6
• Docker image: apache/age:release_PG18_1.8.0

Reproduction

Execute the following Cypher through the standard AGE
ag_catalog.cypher('graph_name', $$...$$) interface:

UNWIND [1, 2] AS x
CREATE (a)-[r:R]->(b)
WITH startNode(r) AS s
RETURN s

Expected

The query returns two start vertices.

Actual

ERROR: graphid 281474976710659 does not exist

The graphid is generated internally and is not present in the Cypher input.

Controls

The one-row form succeeds:

UNWIND [1] AS x
CREATE (a)-[r:R]->(b)
WITH startNode(r) AS s
RETURN s

Directly returning the created entities for two rows also succeeds:

UNWIND [1, 2] AS x
CREATE (a)-[r:R]->(b)
RETURN a, b, r