we are migrating data from neo4j to nebula by using csv file. There is one field which type is bool. In neo4j export csv file, the value could be true/false/empty. In such case, importing failed due to nebula reject empty value.

So we need to add default value while filed value is missing. Below is the example we want:

data.csv:
100,true,
101,,

Schema definition:
schema:
type: vertex
vertex:
tags:
- name: collection
props:
- name: used
type: bool
default: false

The second line in data will use default value false and below will load to nebula:
100(true)
101(false)