node-red-contrib-parquet

Converts between a PARQUET string and its JavaScript object representation, in either direction.

Installation

It can be installed from the Node-RED palette, or by executing the following command in the Node-RED installation directory:

npm install @msigrupo-develop/node-red-contrib-parquet

Dependencies

This package depends on the following libraries:

• parquetjs-lite

Usage

Read or write mode must be selected.

Read mode

It will parse a single Buffer object from a parquet file to its JavaScript object representation. It is intended to be used together with the file reading node.

• A single message per row
• A single message [array]

By default, the output is sent to msg.payload bu it can be configured. An example is ready to use.

Write mode

It will parse a JavaScript object to a Parqute single Buffer object. It is intended to be used together with the file writting node. The columns names and types to be processed from the input must be configured. The input must be an array of objects with the names and values of the columns. The output returns a single Buffer object in msg.payload. An example is ready to use.

Changelog

Changes can be followed here

Credits

This project receives funding in the European Commission’s Horizon 2020 Research Programme under Grant Agreement Number 870062

License

MIT