Can't reindex explicit node_auto_index

[francescoinfante]

I have encountered a regression in Neo4j 3.4. In Neo4j 3.3.x, if I had to reindex the explicit automatic index node_auto_index I would have run the following Cypher query:

MATCH (p) SET p.`name` = p.`name` RETURN count(p)

In Neo4j 3.4, this query doesn't reindex anymore existing nodes in node_auto_index. But, if I actually apply an update to the node:

MATCH (p) SET p.`name` = 'lol' RETURN count(p)

I can search the node by its name in node_auto_index.

Neo4j Version: 3.4.0
Operating System: OS X 10.13

Steps to reproduce

1. Have a Neo4j dataset with same nodes with property key "name". One node with name: "test"
2. Configure the node_auto_index by adding to the Neo4j config file and restart Neo4j:

• dbms.auto_index.nodes.enabled=true
• dbms.auto_index.nodes.keys=name

3. Run START i=node:node_auto_index('name:test') return i limit 1
   Nothing should be returned
4. Run MATCH (p) WITH p, p.name as name SET p.name = name RETURN count(p)
5. Run START i=node:node_auto_index('name:test') return i limit 1
   The node should be returned

In 3.3.x it works as described. In 3.4.0 the node at step 5 is not returned.