Stay organized with collections Save and categorize content based on your preferences.
Edit on GitHub
Report issue
Page history

Import AVRO and CSV files to BigQuery from Cloud Storage with a Cloud Function

Author(s): @mikekahn ,   Published: 2018-05-06

Mike Kahn | Customer Engineer | Google

Contributed by Google employees.

This tutorial demonstrates using a Cloud Function to create a serverless cron scheduled import for data management or data science workflows. One such use case would be when a third party provides data uploaded to a Cloud Storage bucket on a regular basis in a Google Cloud project. Instead of manually importing the CSV or AVRO file to BigQuery each day, you can use a Cloud Function with a trigger on object.finalize on a set bucket. This way, whenever a CSV or an AVRO file is uploaded to that bucket, the function imports the file to a new BigQuery table to the specified dataset.

Cloud Function AVRO import workflow


  1. Enable Cloud Functions, Cloud Storage, and BigQuery APIs in the Cloud Console.
  2. Open Cloud Shell in the Cloud Console
  3. Download the ZIP file with all files:

  4. Extract:

  5. Update index.js with your projectId and datasetId (destination).

  6. Update --trigger-resource flag with your source Cloud Storage bucket (replace avro-import-source)

  7. Run the function:

  8. Verify the function is running in the Cloud Console.

  9. Upload an AVRO file to the source Cloud Storage bucket you specified in

This cloud function should deploy and wait for new objects to be finalized on the source Cloud Storage bucket. Once a new AVRO file is uploaded to the source it will use the BigQuery API to load the new dataset into a new table.

This will only create a new table for each new import. You might need to update the function for replacing previous tables.

Submit a tutorial

Share step-by-step guides

Submit a tutorial

Request a tutorial

Ask for community help

Submit a request

View tutorials

Search Google Cloud tutorials

View tutorials

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates.