RetroSearch Browse

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://cloud.google.com/cpp/docs/reference/bigquery/2.35.0 below:

C++ Client Libraries | Google Cloud

Stay organized with collections Save and categorize content based on your preferences.

Cloud BigQuery C++ Client Library

The Cloud BigQuery C++ Client library offers types and functions to use Cloud BigQuery from C++ applications.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/bigquery/quickstart/ directory, which should give you a taste of the Cloud BigQuery C++ client library API.

#include "google/cloud/bigquery/storage/v1/bigquery_read_client.h"
#include <iostream>

namespace {
void ProcessRowsInAvroFormat(
    ::google::cloud::bigquery::storage::v1::AvroSchema const&,
    ::google::cloud::bigquery::storage::v1::AvroRows const&) {
  // Code to deserialize avro rows should be added here.
}
}  // namespace

int main(int argc, char* argv[]) try {
  if (argc != 3) {
    std::cerr << "Usage: " << argv[0] << " <project-id> <table-name>\n";
    return 1;
  }

  // project_name should be in the format "projects/<your-gcp-project>"
  std::string const project_name = "projects/" + std::string(argv[1]);
  // table_name should be in the format:
  // "projects/<project-table-resides-in>/datasets/<dataset-table_resides-in>/tables/<table
  // name>" The project values in project_name and table_name do not have to be
  // identical.
  std::string const table_name = argv[2];

  // Create a namespace alias to make the code easier to read.
  namespace bigquery_storage = ::google::cloud::bigquery_storage_v1;
  constexpr int kMaxReadStreams = 1;
  // Create the ReadSession.
  auto client = bigquery_storage::BigQueryReadClient(
      bigquery_storage::MakeBigQueryReadConnection());
  ::google::cloud::bigquery::storage::v1::ReadSession read_session;
  read_session.set_data_format(
      google::cloud::bigquery::storage::v1::DataFormat::AVRO);
  read_session.set_table(table_name);
  auto session =
      client.CreateReadSession(project_name, read_session, kMaxReadStreams);
  if (!session) throw std::move(session).status();

  // Read rows from the ReadSession.
  constexpr int kRowOffset = 0;
  auto read_rows = client.ReadRows(session->streams(0).name(), kRowOffset);

  std::int64_t num_rows = 0;
  for (auto const& row : read_rows) {
    if (row.ok()) {
      num_rows += row->row_count();
      ProcessRowsInAvroFormat(session->avro_schema(), row->avro_rows());
    }
  }

  std::cout << num_rows << " rows read from table: " << table_name << "\n";
  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

Main classes

This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.

The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.

Next Steps

Error Handling - describes how the library reports errors.
How to Override the Default Endpoint - describes how to override the default endpoint.
How to Override the Authentication Credentials - describes how to change the authentication credentials used by the library.
Override Retry, Backoff, and Idempotency Policies - describes how to change the default retry policies.
Environment Variables - describes environment variables that can configure the behavior of the library.
Testing your Cloud BigQueryRead application with googlemock

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 the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage details the Cloud BigQuery C++ Client Library, which is a GA (Generally Available) library that provides tools for interacting with Cloud BigQuery from C++ applications."],["The library does not follow semantic versioning, and it currently offers version 2.37.0-rc as the latest release candidate and 2.36.0 as the newest release."],["The provided quickstart guide demonstrates how to create a `ReadSession`, and read rows from a specified table in AVRO format using the library's `BigQueryReadClient`."],["The library encompasses various `*Client` classes for different BigQuery services, including AnalyticsHubService, MetastoreService, ConnectionService, and more."],["The \"Next Steps\" section provides guidance on topics like error handling, endpoint overriding, authentication credential management, retry policy modifications, and using environment variables, as well as details for testing applications."]]],[]]

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4