This directory contains an idiomatic C++ client library for interacting with Google Cloud Spanner, which is a fully managed, scalable, relational database service for regional and global application data.
Please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.
- Windows, macOS, Linux
- C++11 (and higher) compilers (we test with GCC >= 4.9, Clang >= 3.8, and MSVC >= 2019)
- Environments with or without exceptions
- Bazel and CMake builds
- Official documentation about the Cloud Spanner service
- Reference doxygen documentation for each release of this client library
- Detailed header comments in our public
.hfiles
The quickstart/ directory contains a minimal environment to help you quickly get started using this client library. The following is the "Hello World" program you'll be running, which should give you a taste of this library.
#include "google/cloud/spanner/client.h"
#include <iostream>
#include <stdexcept>
int main(int argc, char* argv[]) try {
if (argc != 4) {
std::cerr << "Usage: " << argv[0]
<< " project-id instance-id database-id\n";
return 1;
}
namespace spanner = ::google::cloud::spanner;
spanner::Client client(
spanner::MakeConnection(spanner::Database(argv[1], argv[2], argv[3])));
auto rows =
client.ExecuteQuery(spanner::SqlStatement("SELECT 'Hello World'"));
for (auto const& row : spanner::StreamOf<std::tuple<std::string>>(rows)) {
if (!row) throw std::runtime_error(row.status().message());
std::cout << std::get<0>(*row) << "\n";
}
return 0;
} catch (std::exception const& ex) {
std::cerr << "Standard exception raised: " << ex.what() << "\n";
return 1;
}See CONTRIBUTING.md for details on how to
contribute to this project, including how to build and test your changes
as well as how to properly format your code.
Apache 2.0; see LICENSE for details.