sqlpp11/tests/sqlite3/usage/Attach.cpp

/*
 * Copyright (c) 2015 - 2016, Roland Bock
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#include "Tables.h"
#include <cassert>
#include <sqlpp11/sqlite3/database/connection.h>
#include <sqlpp11/sqlpp11.h>

#ifdef SQLPP_USE_SQLCIPHER
#include <sqlcipher/sqlite3.h>
#else
#include <sqlite3.h>
#endif
#include <iostream>
#include <vector>

namespace sql = sqlpp::sqlite3;

int Attach(int, char*[])
{
  sql::connection_config config;
  config.path_to_database = ":memory:";
  config.flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
  config.debug = true;

  // Opening a connection to an in-memory database and creating a table in it
  sql::connection db(config);
  test::createTabSample(db);

  // Attaching another in-memory database and creating the same table in it
  auto other = db.attach(config, "other");
  db.execute(R"(CREATE TABLE other.tab_sample (
  id INTEGER PRIMARY KEY,
  alpha bigint(20) DEFAULT NULL,
  beta varchar(255) DEFAULT NULL,
  gamma boolean
))");

  auto left = test::TabSample{};
  auto right =
      schema_qualified_table(other, test::TabSample{}).as(sqlpp::alias::right);  // this is a table in the attached database

  // inserting in one tab_sample
  db(insert_into(left).default_values());

  // selecting from the other tab_sample
  assert(db(select(all_of(right)).from(right).unconditionally()).empty());

  return 0;
}