Looking to use ReplaceText on nifi to convert json Array to csv

[#1]

Hello, I am currently trying to use ReplaceText on nifi to convert from json array into csv format. However I am having problems in figuring out how to work with the search value and replacement value in regex since I am new at regex. I was wondering if someone could point me in the right direction or help me figure out where I could learn to do this using regex. I will apreciate any helpful input and advice.

[#2 · Accepted solution]

I've had the same problem when pulling data from an execute sql processor.

Not specifically the solution you were asking for, but there is this processor which looks just about ready to be merged. Maybe you could pull this down and merge it into your own nifi instance.

https://issues.apache.org/jira/browse/NIFI-1583