[Improvement][Spark]: Neo4j2GraphAr change the type

[jasinliu]

Is there an existing issue for this?

• [X] I have searched the existing issues

Current Behavior

The former data type is Long in neo4j. But after importer, it becomes string when there is a null.

Just like this.

Expected Behavior

Fix it.

Minimal Reproducible Example

Maybe this.

Environment

• Operating system: ubuntu
• GraphAr version: latest

Link to GraphAr Logs

No response

Further Information

No response