Vector Search API C++ Client Library

An idiomatic C++ client library for the Vector Search API.

The Vector Search API provides a fully-managed, highly performant, and scalable vector database designed to power next-generation search, recommendation, and generative AI applications. It allows you to store, index, and query your data and its corresponding vector embeddings through a simple, intuitive interface. With Vector Search, you can define custom schemas for your data, insert objects with associated metadata, automatically generate embeddings from your data, and perform fast approximate nearest neighbor (ANN) searches to find semantically similar items at scale.

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

Quickstart

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

#include "google/cloud/vectorsearch/v1/vector_search_client.h"
#include "google/cloud/location.h"
#include <iostream>

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

  auto const location = google::cloud::Location(argv[1], argv[2]);

  namespace vectorsearch = ::google::cloud::vectorsearch_v1;
  auto client = vectorsearch::VectorSearchServiceClient(
      vectorsearch::MakeVectorSearchServiceConnection());

  for (auto r : client.ListCollections(location.FullName())) {
    if (!r) throw std::move(r).status();
    std::cout << r->DebugString() << "\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.

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