bigquery_fdw: BigQuery Foreign Data Wrapper for PostgreSQL

bigquery_fdw is a BigQuery foreign data wrapper for PostgreSQL using Multicorn.

It allows to write queries in PostgreSQL SQL syntax using a foreign table. It supports most of BigQuery's data types and operators.

Features and limitations

Table partitioning is supported. You can use partitions in your SQL queries.
Queries are parameterized when sent to BigQuery
BigQuery's standard SQL support (legacy SQL is not supported)
Authentication works with a "Service Account" Json private key

Requirements

PostgreSQL >= 9.5 up to 14
Python >= 3.4

Get started

Using docker

See getting started with Docker

Installation on Debian/Ubuntu

Dependencies required to install bigquery_fdw:

You need to install the following dependencies:

# Install required packages
apt update
apt install -y postgresql-server-dev-14 python3-setuptools python3-dev make gcc git

All PostgreSQL versions from 9.2 to 14 should be supported.

Installation

# Install Multicorn
# pgsql-io/multicorn2 is a fork of Segfault-Inc/Multicorn that adds support for PostgreSQL 13/14.
# Alternatively, up to PostgreSQL 12, you can use gabfl/Multicorn that adds better support for Python3.
# You may also choose to build against the original project instead.
git clone https://github.com/pgsql-io/multicorn2.git Multicorn && cd Multicorn
make && make install

# Install bigquery_fdw
pip3 install bigquery-fdw

Major dependencies installed automatically during the installation process:

Authentication

bigquery_fdw relies on Google Cloud API's default authentication.

Your need to have an environment variable GOOGLE_APPLICATION_CREDENTIALS that has to be accessible by bigquery_fdw. Setting environment variables varies depending on OS but for Ubuntu or Debian, the preferred way is to edit /etc/postgresql/[version]/main/environment and add:

GOOGLE_APPLICATION_CREDENTIALS = '/path/to/key.json'

Restarting PostgreSQL is required for the environment variable to be loaded.

Usage

We recommend testing the BigQuery client connectivity before trying to use the FDW.

With psql:

CREATE EXTENSION multicorn;

CREATE SERVER bigquery_srv FOREIGN DATA WRAPPER multicorn
OPTIONS (
    wrapper 'bigquery_fdw.fdw.ConstantForeignDataWrapper'
);

CREATE FOREIGN TABLE my_bigquery_table (
    column1 text,
    column2 bigint
) SERVER bigquery_srv
OPTIONS (
    fdw_dataset  'my_dataset',
    fdw_table 'my_table'
);

Options

List of options implemented in CREATE FOREIGN TABLE syntax:

Option	Default	Description
`fdw_dataset`	-	BigQuery dataset name
`fdw_table`	-	BigQuery table name
`fdw_convert_tz`	-	Convert BigQuery time zone for dates and timestamps to selected time zone. Example: `'US/Eastern'`.
`fdw_group`	`'false'`	See Remote grouping and counting.
`fdw_casting`	-	See Casting.
`fdw_verbose`	`'false'`	Set to `'true'` to output debug information in PostrgeSQL's logs
`fdw_sql_dialect`	`'standard'`	BigQuery SQL dialect. Currently only `standard` is supported.

gabfl / bigquery_fdw

readme