sqlixx's Introduction

SQLite C++ driver (SQLite API)

dmitigr::sqlixx - is a header-only C++ driver for SQLite.

To use this library, a compiler with C++17 support (such as GCC 7.5+) is required.

Features

easy to use, header-only library;
almost no overhead compared to native C API;
zero-based indices for both prepared statement parameters and result columns;
easy to use extensible data type conversion system.

Usage

Copy the content of folder src into a folder under include path, for example, /usr/local/include/dmitigr, then #include <dmitigr/sqlixx/sqlixx.hpp>.

Example

#include <dmitigr/sqlixx/sqlixx.hpp>
#include <iostream>

int main()
{
  namespace sqlixx = dmitigr::sqlixx;
  sqlixx::Connection c{"", SQLITE_OPEN_READWRITE | SQLITE_OPEN_MEMORY};

  // Create the test table.
  c.execute(
    R"(
    create table if not exists tab(
      id integer primary key,
      cr real,
      ct text,
      cb blob)
    )"
  );

  // Truncate the test table.
  c.execute("delete from tab");

  // Populate the test table.
  auto s = c.prepare("insert into tab(id, cr, ct, cb) values(?, ?, ?, ?)");
  c.execute("begin");
  s.execute(0, 1.2, std::to_string(3), sqlixx::Blob{"four", 4});
  s.execute(1, 2.3, std::string_view{"four", 4}, sqlixx::Blob{"five", 4});
  s.execute(2, 3.4, sqlixx::Text_utf8{"five", 4}, sqlixx::Blob{"six", 3});
  c.execute("end");

  // Query the test table.
  c.execute([](const sqlixx::Statement& s)
  {
    const auto b = s.result<sqlixx::Blob>("cb");
    const std::string_view cb{static_cast<const char*>(b.data()), b.size()};
    const auto t1 = s.result<sqlixx::Text_utf8>("ct");
    const auto t2 = s.result<std::string>("ct");
    const auto t3 = s.result<std::string_view>("ct");
    assert(!std::strcmp(t1.data(), t2.data()) && (t2 == t3));
    std::cout << "id: " << s.result<int>("id") << "\n"
              << "cr: " << s.result<double>("cr") << "\n"
              << "ct: " << t3 << "\n"
              << "cb: " << cb << "\n";
  },
  "select * from tab where id >= ? and id < ?", 0, 3);
}

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