How to store json object in a variable using apache nifi?

[#1]

The following flowfile is the response of an "InvokeHttp":

[

  {"data1":"[{....},{...},{....}]","info":"data-from_site"},

  {"data2":"[{....},{...},{....}]","info":"data-from_site"},

  {"data3":"[{....},{...},{....}]","info":"data-from_site"}

]

I did a "SplitJson", i got each json record as a single flowfile

flowfile 1:

  {"data1":"[{....},{...},{....}]","info":"data-from_site"}

flowfile 2:

  {"data2":"[{....},{...},{....}]","info":"data-from_site"}

flowfile 3:

  {"data3":"[{....},{...},{....}]","info":"data-from_site"}

I want to store each json record in each flowfile in a variable like that:

  variable1 = "{"data1":"[{....},{...},{....}]","info":"data-from_site"}"

  variable2 = "{"data2":"[{....},{...},{....}]","info":"data-from_site"}"

  variable3 = "{"data3":"[{....},{...},{....}]","info":"data-from_site"}"

can someone show me how to store the json record in a variable !

[#2]

This is not efficient and will use a lot of heap depending on how big the list and the json array. Can you explain more what are you trying to do  and why you want to create different variable for each json flowfile? Maybe there is a better way.

[#3]

To store each json flowfile as a single row in Postgres. 

[#4]

I thought we discussed this here:

https://community.cloudera.com/t5/Support-Questions/How-to-load-json-record-to-postgres-as-json-data...

[#5]

The solution you suggested there wasn't helpful. 

[#6]

I apologize for that, I hope someone else step in and help you with better solution. May I just know why it did not help?