Q:

How to specify the special control char for delimiter? 

I have some files got from hive which use '\001' for delimiter.  But I failed using neo4j-importer to import nodes and edges.  How can I specify '\001' correctly? 

A:

Right now afaik it's not possible to specify it. 
If you're able to run java you might call
org.neo4j.tooling. ImportTool.main(args) 
and provide as part of your args
..., "--delimiter", String.valueOf((char)0), ...

