NIFI processor for converting a numeric type to string type for a specific column in CSV file

[#1]

Hi,

I am new to NIFI, and I was wondering if I could change the specific column in the csv file.

for example, if the column has numerical values it is supposed to be converted to string type 

like if the column had a numerical value 1 it should be converted to apple in the same column

I tried doing it by referring to websites but still I was not successful. Looking forward for some response for this problem. Thanks in advance

[#2]

@Former Member Welcome to the Cloudera Community!

To help you get the best possible solution, I have tagged our NiFi experts @MattWho @mburgess  who may be able to assist you further.

Please keep us updated on your post, and we hope you find a satisfactory solution to your query.

[#3 · Accepted solution]

@Former Member 

LookupRecord processor can be used in this case.   Please check if this method works for you.

Sample CSV input

id,brand,phone
10,Samsung,1
20,Apple,2

Expected output (codes 1 and 2 are replaced with names)

id,brand,phone
10,Samsung,Note
20,Apple,iPhone

I tried nifi flow as below

Lookup record configuration

CSV Reader

CSV Recordset Writer

Didnt make any change.  Used default settings

Simple KeyValue Lookup service.  There are several lookup services available in Nifi.  You may use right service as per your requirement.