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/Date.cpp

@@ -0,0 +1,146 @@
+/**
+ * Copyright © 2017 Volker Aßmann
+ * 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 <iostream>
+
+#include <sqlpp11/custom_query.h>
+#include <sqlpp11/postgresql/postgresql.h>
+#include <sqlpp11/sqlpp11.h>
+
+#include "TabSample.h"
+#include "make_test_connection.h"
+
+namespace
+{
+  const auto now = ::sqlpp::chrono::floor<::std::chrono::microseconds>(std::chrono::system_clock::now());
+  const auto today = ::sqlpp::chrono::floor<::sqlpp::chrono::days>(now);
+  const auto yesterday = today - ::sqlpp::chrono::days{1};
+
+  template <typename L, typename R>
+  void require_equal(int line, const L& l, const R& r)
+  {
+    if (l != r)
+    {
+      std::cerr << line << ": ";
+      serialize(::sqlpp::wrap_operand_t<L>{l}, std::cerr);
+      std::cerr << " != ";
+      serialize(::sqlpp::wrap_operand_t<R>{r}, std::cerr);
+      throw std::runtime_error("Unexpected result");
+    }
+  }
+
+  template <class Db>
+  void prepare_table(Db&& db, bool with_tz)
+  {
+    db.execute("DROP TABLE IF EXISTS tab_date_time");
+    if (with_tz)
+    {
+      // prepare test with timezone
+      db.execute("CREATE TABLE tab_date_time (col_day_point DATE, col_time_point TIMESTAMP WITH TIME ZONE)");
+    }
+    else
+    {
+      // prepare  test without timezone
+      db.execute("CREATE TABLE tab_date_time (col_day_point DATE, col_time_point TIMESTAMP)");
+    }
+  }
+
+}  // namespace
+
+int Date(int, char*[])
+{
+
+  namespace sql = sqlpp::postgresql;
+
+  sql::connection db = sql::make_test_connection();
+
+
+  try
+  {
+    for (int i = 0; i <= 1; ++i)
+    {
+      if (i)
+        std::cerr << "Testing date/time WITH timezone\n";
+      else
+        std::cerr << "Testing date/time WITHOUT timezone\n";
+      prepare_table(db, i);
+
+      const auto tab = TabDateTime{};
+      db(insert_into(tab).default_values());
+      for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
+      {
+        require_equal(__LINE__, row.colDayPoint.is_null(), true);
+        require_equal(__LINE__, row.colDayPoint.value(), ::sqlpp::chrono::day_point{});
+        require_equal(__LINE__, row.colTimePoint.is_null(), true);
+        require_equal(__LINE__, row.colTimePoint.value(), ::sqlpp::chrono::microsecond_point{});
+      }
+
+      db(update(tab).set(tab.colDayPoint = today, tab.colTimePoint = now).unconditionally());
+
+      for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
+      {
+        require_equal(__LINE__, row.colDayPoint.value(), today);
+        require_equal(__LINE__, row.colTimePoint.value(), now);
+      }
+
+      db(update(tab).set(tab.colDayPoint = yesterday, tab.colTimePoint = today).unconditionally());
+
+      for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
+      {
+        require_equal(__LINE__, row.colDayPoint.value(), yesterday);
+        require_equal(__LINE__, row.colTimePoint.value(), today);
+      }
+
+      auto prepared_update = db.prepare(
+          update(tab)
+              .set(tab.colDayPoint = parameter(tab.colDayPoint), tab.colTimePoint = parameter(tab.colTimePoint))
+              .unconditionally());
+      prepared_update.params.colDayPoint = today;
+      prepared_update.params.colTimePoint = now;
+      std::cout << "---- running prepared update ----" << std::endl;
+      db(prepared_update);
+      std::cout << "---- finished prepared update ----" << std::endl;
+
+      for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
+      {
+        require_equal(__LINE__, row.colDayPoint.value(), today);
+        require_equal(__LINE__, row.colTimePoint.value(), now);
+      }
+    }
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Exception: " << e.what() << std::endl;
+    return 1;
+  }
+  catch (...)
+  {
+    std::cerr << "Unknown exception" << std::endl;
+    return 1;
+  }
+  return 0;
+}