Filebeat PostgreSQL Module

I would like to know how to see PostgreSQL fields in Kibana.
https://www.elastic.co/guide/en/beats/filebeat/6.5/exported-fields-postgresql.html

Below is a part of the PostgreSQL log which can be seen in kibana and it shows that "postgresql" module is used.
"event": {
"module": "postgresql",
"dataset": "postgresql.log"
}

Thank you,
Kazuo