Transaction management - 3. Default locking behavior

[ivanruski]

Hello,
I am using Neo4j v4.3.10 and according to the docs:

When creating or deleting a relationship a write lock will be taken on the specific relationship and both its nodes.

However I am observing different behavior when deleting a relationship between 2 nodes.

Steps to reproduce:

1. Run the following query:

MATCH (t:Thing{uuid:"tosho"})
MATCH (g:Thing{uuid:"gosho"})
MERGE (t)-[fr:FRIEND]->(g)

2. Then

MATCH (t:Thing{uuid:"tosho"})
MATCH (g:Thing{uuid:"gosho"})
MATCH (t)-[fr:FRIEND]->(g)
DELETE fr
WITH t call apoc.util.sleep(200000) RETURN t;

3. Then, find the transaction's queryId

call dbms.listTransactions()

4. List the active locks for that query

call dbms.listActiveLocks('query-xxxx')

I am seeing only one EXCLUSIVE lock for the relationship.
"EXCLUSIVE"│"RELATIONSHIP_DELETE" │115762891

The rest of the locks are shared, whereas I am expecting to see 3 EXCLUSIVE locks according to the docs - one for the relationship and 2 for the nodes.