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Export Collections to BigQuery

Firebase
Made by Firebase

Sends realtime, incremental updates from a specified Cloud Firestore collection to BigQuery.

How this extension works

Use this extension to export the documents in a Cloud Firestore collection to BigQuery. Exports are realtime and incremental, so the data in BigQuery is a mirror of your content in Cloud Firestore.

The extension creates and updates a dataset containing the following two BigQuery resources:

  • A table of raw data that stores a full change history of the documents within your collection. This table includes a number of metadata fields so that BigQuery can display the current state of your data. The principle metadata fields are timestamp, document_name, and the operation for the document change.
  • A view which represents the current state of the data within your collection. It also shows a log of the latest operation for each document (CREATE, UPDATE, or IMPORT).

If you create, update, delete, or import a document in the specified collection, this extension sends that update to BigQuery. You can then run queries on this mirrored dataset.

Note that this extension only listens for document changes in the collection, but not changes in any subcollection. You can, though, install additional instances of this extension to specifically listen to a subcollection or other collections in your database. Or if you have the same subcollection across documents in a given collection, you can use {wildcard} notation to listen to all those subcollections (for example: chats/{chatid}/posts).

Additional setup

Before installing this extension, you'll need to:

Backfill your BigQuery dataset

This extension only sends the content of documents that have been changed -- it does not export your full dataset of existing documents into BigQuery. So, to backfill your BigQuery dataset with all the documents in your collection, you can run the import script provided by this extension.

Important: Run the import script over the entire collection after installing this extension, otherwise all writes to your database during the import might be lost.

Generate schema views

After your data is in BigQuery, you can run the schema-views script (provided by this extension) to create views that make it easier to query relevant data. You only need to provide a JSON schema file that describes your data structure, and the schema-views script will create the views.

Billing

To install an extension, your project must be on the Blaze (pay as you go) plan

  • You will be charged a small amount (typically around $0.01/month) for the Firebase resources required by this extension (even if it is not used).
  • This extension uses other Firebase and Google Cloud Platform services, which have associated charges if you exceed the service’s free tier:
  • BigQuery (this extension writes to BigQuery with streaming inserts)
  • Cloud Firestore
  • Cloud Functions (Node.js 10+ runtime. See FAQs)

How to install this extension

Using the Firebase console

To install and manage extensions, you can use the Firebase console.

Install using console

Using the Firebase CLI

To install and manage extensions, you can also use the Firebase CLI:

Step 1: Run the following npm command to install the CLI or update to the latest CLI version.

npm install -g firebase-tools
Doesn't work? Take a look at the Firebase CLI reference or change your npm permissions.

Step 2: Install this extension by running the following command

firebase ext:install firestore-bigquery-export --project=projectId_or_alias
Author
License
Apache-2.0
Version
0.1.10