I would like to know if it's possible to create a new field with information that are taken from another field.
I'm using sql connection.
I've a field named :
- Code_postal (that has 3 or 5 digits - I only need to take care of the 5 digits)
I would like to create a field named :
- departement (should take the 2 first digits of the Code_postal field).
How Can I do that in logstash, I was thinking about Regexp to do that but never see any exemple.