Output JSON field to postgres database taking too long >256 characters

[vujennyfer]

Hello, 

I am trying to output a table with a JSON field to a postgres database and it is taking far too long than if I just created the JSON build in SQL. Have others run into this issue? Attached is a sample workflow. In my actual data, the JSON/data column has a red triangle and warning that says 'This cell has >256 characters'. The goal is to have an ETL workflow convert the final flat file into a JSON format to upload to a database efficiently.

Let me know if I can clarify anything!