Started to migrate postgresql connector into sqlpp11 repo.

Removed timezone handling in the process (needs to be documented).
Note: on_conflict does not check for constraints (needs to be documented).
Note: some of the constraints tests seem to be aiming for a different static_assert.

tests/postgresql/usage/Select.cpp

@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013 - 2015, 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,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <cassert>
+#include <iostream>
+#include <vector>
+
+#include <sqlpp11/postgresql/postgresql.h>
+#include <sqlpp11/sqlpp11.h>
+
+#include "TabFoo.h"
+#include "make_test_connection.h"
+
+SQLPP_ALIAS_PROVIDER(left);
+
+namespace sql = sqlpp::postgresql;
+model::TabFoo tab = {};
+
+void testSelectAll(sql::connection& db, int expectedRowCount)
+{
+  std::cerr << "--------------------------------------" << std::endl;
+  int i = 0;
+  for (const auto& row : db(sqlpp::select(all_of(tab)).from(tab).unconditionally()))
+  {
+    ++i;
+    std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
+              << std::endl;
+    assert(i == row.alpha);
+  };
+  assert(i == expectedRowCount);
+
+  auto preparedSelectAll = db.prepare(sqlpp::select(all_of(tab)).from(tab).unconditionally());
+  i = 0;
+  for (const auto& row : db(preparedSelectAll))
+  {
+    ++i;
+    std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
+              << std::endl;
+    assert(i == row.alpha);
+  };
+  assert(i == expectedRowCount);
+  std::cerr << "--------------------------------------" << std::endl;
+}
+
+int Select(int, char*[])
+{
+  sql::connection db = sql::make_test_connection();
+
+  db.execute(R"(DROP TABLE IF EXISTS tabfoo;)");
+  db.execute(R"(CREATE TABLE tabfoo
+             (
+               alpha bigserial NOT NULL,
+               beta smallint,
+               gamma text,
+               c_bool boolean,
+               c_timepoint timestamp with time zone,
+               c_day date
+             ))");
+
+  testSelectAll(db, 0);
+  db(insert_into(tab).default_values());
+  testSelectAll(db, 1);
+  db(insert_into(tab).set(tab.c_bool = true, tab.gamma = "cheesecake"));
+  testSelectAll(db, 2);
+  db(insert_into(tab).set(tab.c_bool = true, tab.gamma = "cheesecake"));
+  testSelectAll(db, 3);
+
+  // Test size functionality
+  const auto test_size = db(select(all_of(tab)).from(tab).unconditionally());
+  assert(test_size.size() == 3);
+
+  // test functions and operators
+  db(select(all_of(tab)).from(tab).where(tab.alpha.is_null()));
+  db(select(all_of(tab)).from(tab).where(tab.alpha.is_not_null()));
+  db(select(all_of(tab)).from(tab).where(tab.alpha.in(1, 2, 3)));
+  db(select(all_of(tab)).from(tab).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
+  db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(1, 2, 3)));
+  db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
+  db(select(count(tab.alpha)).from(tab).unconditionally());
+  db(select(avg(tab.alpha)).from(tab).unconditionally());
+  db(select(max(tab.alpha)).from(tab).unconditionally());
+  db(select(min(tab.alpha)).from(tab).unconditionally());
+  db(select(exists(select(tab.alpha).from(tab).where(tab.alpha > 7))).from(tab).unconditionally());
+  db(select(all_of(tab)).from(tab).where(tab.alpha == any(select(tab.alpha).from(tab).where(tab.alpha < 3))));
+  db(select(all_of(tab)).from(tab).where(tab.alpha == some(select(tab.alpha).from(tab).where(tab.alpha < 3))));
+  db(select(all_of(tab)).from(tab).where(tab.alpha + tab.alpha > 3));
+  db(select(all_of(tab)).from(tab).where((tab.gamma + tab.gamma) == ""));
+  db(select(all_of(tab)).from(tab).where((tab.gamma + tab.gamma).like("%'\"%")));
+
+  // test boolean value
+  db(insert_into(tab).set(tab.c_bool = true, tab.gamma = "asdf"));
+  db(insert_into(tab).set(tab.c_bool = false, tab.gamma = "asdfg"));
+
+  assert(db(select(tab.c_bool).from(tab).where(tab.gamma == "asdf")).front().c_bool);
+  assert(not db(select(tab.c_bool).from(tab).where(tab.gamma == "asdfg")).front().c_bool);
+  assert(not db(select(tab.c_bool).from(tab).where(tab.alpha == 1)).front().c_bool);
+
+  // test
+
+  // update
+  db(update(tab).set(tab.c_bool = false).where(tab.alpha.in(1)));
+  db(update(tab).set(tab.c_bool = false).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
+
+  // remove
+  db(remove_from(tab).where(tab.alpha == tab.alpha + 3));
+
+  auto result = db(select(all_of(tab)).from(tab).unconditionally());
+  std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->alpha
+            << std::endl;
+  std::cerr << "Can do that again, no problem: " << result.begin()->alpha << std::endl;
+
+  auto tx = start_transaction(db);
+  if (const auto& row = *db(select(all_of(tab), select(max(tab.alpha)).from(tab)).from(tab).unconditionally()).begin())
+  {
+    auto a = row.alpha;
+    auto m = row.max;
+    std::cerr << "-----------------------------" << a << ", " << m << std::endl;
+  }
+  tx.commit();
+
+  return 0;
+}