Use BigQuery Storage API from R.
The main utility is to replace bigrquery::bq_table_download method.
It supports BigQueryRead interface. Support for BigQueryWrite interface may be added in a future release.
BigQuery Storage API is not rate limited and per project quota do not apply. It is an rpc protocol and provides faster downloads for big results sets.
This implementation use a C++ generated client combined with the arrow R package to transform the raw stream into an R object.
bqs_table_download is the main function of this package. Other functions are helpers to facilitate authentication and debugging.
The package also includes DBI methods for dbFetch and dbReadTable. It should be loaded after bigrquery. Alternatively, use overload_bq_table_download to replace bigrquery::bq_table_download directly in bigrquery namespace.
# install protoc and grpc
apt-get install -y libgrpc++-dev libprotobuf-dev protobuf-compiler-grpc \
pkg-config Other Linux distributions
Please let us know if these instructions do not work any more.
Alpine Linux 3.19 and Edge do not work currently, because the installation of the arrow package fails.
Needs the buster-backports repository.
echo "deb https://deb.debian.org/debian buster-backports main" >> \
/etc/apt/sources.list.d/backports.list && \
apt-get update && \
apt-get install -y 'libgrpc\+\+-dev'/buster-backports \
protobuf-compiler-grpc/buster-backports \
libprotobuf-dev/buster-backports \
protobuf-compiler/buster-backports pkg-configIn OpenSUSE 15.4 and 15.5 the version of the grpc package is tool old, so installation fails. You can potentially compile a newer version of grpc from source.
In Ubuntu 20.04 the version of the grpc package is tool old, so installation fails. You can potentially compile a newer version of grpc from source.
These distros do not have a grpc package. You can potentially compile grpc from source.
If you use Homebrew you may install the grpc package, plus pkg-config. If you don’t have Homebrew installed, the package will download static builds of the system dependencies during installation. This works with macOS Big Sur, or later, on Intel and Arm64 machines.
The package will automatically download a static build of the system requirements during installation. This works on R 4.2.x (with Rtools40 or Rtools42), R 4.3.x (with Rtools43) or later currently.
This is a basic example which shows you how to solve a common problem. BigQuery Storage API requires a billing project.
# Auth is done automagically using Application Default Credentials.
# or reusing bigrquery auth.
# Use the following command once to set it up :
# gcloud auth application-default login --billing-project={project}
library(bigrquery)
library(bigrquerystorage)
# TODO: (developer): Set the project_id variable to your billing project.
# The read session will bill this project. This project can be
# different from the one that contains the table.
project_id <- 'your-project-id'
rows <- bqs_table_download(
x = "bigquery-public-data:usa_names.usa_1910_current",
parent = project_id
# , snapshot_time = Sys.time() # a POSIXct time
, selected_fields = c("name", "number", "state"),
row_restriction = 'state = "WA"'
# , sample_percentage = 50
# , as_tibble = TRUE
)
sprintf(
"Got %d unique names in states: %s",
length(unique(rows$name)),
paste(unique(rows$state), collapse = " ")
)
# Replace bigrquery::bq_download_table
rows <- bigrquery::bq_table_download("bigquery-public-data.usa_names.usa_1910_current")
# Downloading 6,122,890 rows in 613 pages.
overload_bq_table_download(project_id)
rows <- bigrquery::bq_table_download("bigquery-public-data.usa_names.usa_1910_current")
# Streamed 6122890 rows in 5980 messages.Done using Google Application Default Credentials (ADC) or by recycling bigrquery authentication. Auth will be done automatically the first time a request is made.
Does not support AVRO output format. Report any issues to the project issue tracker.
Full gRPC debug trace with bigrquerystorage:::bqs_set_log_verbosity(0).