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Jampp Presto User Defined Functions

This repository contains the JSON_SUM aggregation function. It combines all the JSONs in a column by adding the shared keys and appending the rest. It's used as an example for our How to write custom Presto functions blogpost.


The docker-compose and Makefile located in docker-presto-cluster/ are slightly modified versions of the ones found in this repo.

Build image


Launch presto

Presto cluster can be launched by using docker-compose.

make run


make run-with-logs

Shut presto down

make down