diff --git a/include/matador/object/foreign_node_completer.hpp b/include/matador/object/foreign_node_completer.hpp
index 4f3dfc7..6babbad 100644
--- a/include/matador/object/foreign_node_completer.hpp
+++ b/include/matador/object/foreign_node_completer.hpp
@@ -101,12 +101,12 @@ void foreign_node_completer::on_has_many( const char* /*id*/, CollectionType&, c
 }
 
 template<class CollectionType>
-void foreign_node_completer::on_has_many_to_many( const char* id, CollectionType& /*collection*/, const char* /*join_column*/, const char* /*inverse_join_column*/, const utils::foreign_attributes& /*attr*/ ) {
+void foreign_node_completer::on_has_many_to_many( const char* /*id*/, CollectionType& /*collection*/, const char* /*join_column*/, const char* /*inverse_join_column*/, const utils::foreign_attributes& /*attr*/ ) {
     attach_node<typename CollectionType::value_type::value_type>(/*id*/);
 }
 
 template<class CollectionType>
-void foreign_node_completer::on_has_many_to_many( const char* id, CollectionType& /*collection*/, const utils::foreign_attributes& /*attr*/ ) {
+void foreign_node_completer::on_has_many_to_many( const char* /*id*/, CollectionType& /*collection*/, const utils::foreign_attributes& /*attr*/ ) {
     attach_node<typename CollectionType::value_type::value_type>(/*id*/);
 }
 
diff --git a/include/matador/orm/session.hpp b/include/matador/orm/session.hpp
index 71df19f..790005b 100644
--- a/include/matador/orm/session.hpp
+++ b/include/matador/orm/session.hpp
@@ -121,15 +121,17 @@ public:
       return utils::failure(make_error(error_code::FailedToBuildQuery, "Failed to build query for type " + info->get().name() + "."));
     }
 
-    auto obj = build_select_query(data.release()).template fetch_one<Type>(*this);
+    auto res = build_select_query(data.release()).prepare(*this);
+    // auto obj = build_select_query(data.release()).template fetch_one<Type>(*this);
 
-    if (!obj) {
-      return utils::failure(obj.err());
+    if (!res) {
+      return utils::failure(res.err());
     }
-    if (!obj->get()) {
+    auto stmt_result = res->bind(0, const_cast<PrimaryKeyType&>(pk)).template fetch_one<Type>();
+    if (!stmt_result) {
       return utils::failure(make_error(error_code::FailedToFindObject, "Failed to find object of type " + info->get().name() + " with primary key " + std::to_string(pk) + "."));
     }
-    return utils::ok(object::object_ptr<Type>{ obj->release() });
+    return utils::ok(object::object_ptr<Type>{ stmt_result->release() });
   }
 
   template<typename Type>
diff --git a/include/matador/orm/session_query_builder.hpp b/include/matador/orm/session_query_builder.hpp
index a1b9a15..74497ba 100644
--- a/include/matador/orm/session_query_builder.hpp
+++ b/include/matador/orm/session_query_builder.hpp
@@ -88,9 +88,9 @@ public:
     if (pk_.is_null()) {
       entity_query_data_.pk_column_name = id;
     } else if (pk_.is_integer()) {
-      auto v = *pk_.as<V>();
+      // auto v = *pk_.as<V>();
       auto c = sql::column{table_info_stack_.top().table, id, ""};
-      auto co = std::make_unique<query::condition<sql::column, V>>(c, query::basic_condition::operand_type::EQUAL, v);
+      auto co = std::make_unique<query::condition<sql::column, utils::placeholder>>(c, query::basic_condition::operand_type::EQUAL, utils::_);
       entity_query_data_.where_clause = std::move(co);
       entity_query_data_.pk_column_name = id;
     } else if (pk_.is_varchar()) {
diff --git a/include/matador/sql/connection.hpp b/include/matador/sql/connection.hpp
index 73c1c80..1e04ccb 100644
--- a/include/matador/sql/connection.hpp
+++ b/include/matador/sql/connection.hpp
@@ -25,7 +25,7 @@ public:
    * @param info The database connection info data
    * @param sql_logger The logging handler
    */
-  explicit connection(connection_info info, const logger_ptr &sql_logger = null_logger);
+  explicit connection(const connection_info& info, const logger_ptr &sql_logger = null_logger);
   /**
    * @brief Creates a database connection from a connection string.
    *
@@ -147,7 +147,6 @@ private:
   friend class session;
   friend class statement_cache;
 
-  connection_info connection_info_;
   std::unique_ptr<connection_impl> connection_;
   std::shared_ptr<abstract_sql_logger> logger_ = std::make_shared<null_sql_logger>();
 };
diff --git a/include/matador/sql/interface/connection_impl.hpp b/include/matador/sql/interface/connection_impl.hpp
index 6d59b55..ca304e2 100644
--- a/include/matador/sql/interface/connection_impl.hpp
+++ b/include/matador/sql/interface/connection_impl.hpp
@@ -42,14 +42,13 @@ public:
   [[nodiscard]] const class dialect &dialect() const;
 
   [[nodiscard]] virtual std::string to_escaped_string(const utils::blob &value) const = 0;
+  [[nodiscard]] const connection_info &info() const;
 
 protected:
   explicit connection_impl(const connection_info &info);
 
-  [[nodiscard]] const connection_info &info() const;
-
 private:
-  std::reference_wrapper<const connection_info> info_;
+  connection_info info_;
   std::reference_wrapper<const class dialect> dialect_;
 };
 
diff --git a/include/matador/sql/query_result.hpp b/include/matador/sql/query_result.hpp
index 56fdc36..5e61942 100644
--- a/include/matador/sql/query_result.hpp
+++ b/include/matador/sql/query_result.hpp
@@ -139,7 +139,7 @@ public:
   , creator_(std::move(creator)) {}
 
   iterator begin() { return std::move(++iterator(this)); }
-  static iterator end() { return {}; }
+  iterator end() { return {}; }
 
 private:
   friend class query_result_iterator<Type>;
diff --git a/source/orm/sql/column_generator.cpp b/source/orm/sql/column_generator.cpp
index 49958cc..b20f0e4 100644
--- a/source/orm/sql/column_generator.cpp
+++ b/source/orm/sql/column_generator.cpp
@@ -18,15 +18,15 @@ column_generator::column_generator(std::vector<column> &column_infos,
     seen_tables.insert(table_name);
 }
 
-std::vector<column> column_generator::generate( const object::repository& scm, const std::string& name, bool force_lazy ) {
+std::vector<column> column_generator::generate( const object::repository& scm, const std::string& name, bool /*force_lazy*/ ) {
     const auto info = scm.basic_info(name);
     if (!info) {
         return {};
     }
 
     std::vector<column> columns;
-    for (const auto attr : info.value().get().definition()) {
-        columns.push_back(column{attr.name()});
+    for (const auto& attr : info.value().get().definition()) {
+        columns.emplace_back(attr.name());
     }
     return columns;
 }
diff --git a/source/orm/sql/connection.cpp b/source/orm/sql/connection.cpp
index c020803..75890fe 100644
--- a/source/orm/sql/connection.cpp
+++ b/source/orm/sql/connection.cpp
@@ -28,20 +28,17 @@ public:
 };
 
 }
-connection::connection(connection_info info, const std::shared_ptr<abstract_sql_logger> &sql_logger)
-: connection_info_(std::move(info))
-, logger_(sql_logger)
+connection::connection(const connection_info& info, const std::shared_ptr<abstract_sql_logger> &sql_logger)
+: logger_(sql_logger)
 {
-  connection_.reset(backend_provider::instance().create_connection(connection_info_.type, connection_info_));
+  connection_.reset(backend_provider::instance().create_connection(info.type, info));
 }
 
 connection::connection(const std::string& dns, const std::shared_ptr<abstract_sql_logger> &sql_logger)
 : connection(connection_info::parse(dns), sql_logger)
 {}
 
-connection::connection(const connection &x)
-: connection_info_(x.connection_info_)
-{
+connection::connection(const connection &x) {
   if (x.connection_) {
     throw std::runtime_error("couldn't copy connection with valid connection impl");
   }
@@ -52,7 +49,6 @@ connection &connection::operator=(const connection &x) {
     return *this;
   }
 
-  connection_info_ = x.connection_info_;
   if (x.connection_) {
     throw std::runtime_error("couldn't copy connection with valid connection impl");
   }
@@ -60,13 +56,11 @@ connection &connection::operator=(const connection &x) {
 }
 
 connection::connection( connection&& x ) noexcept
-: connection_info_(std::move(x.connection_info_))
-, connection_(std::move(x.connection_))
+: connection_(std::move(x.connection_))
 , logger_(std::move(x.logger_))
 {}
 
 connection & connection::operator=(connection &&x) noexcept {
-  connection_info_ = std::move(x.connection_info_);
   connection_  = std::move(x.connection_);
   logger_ = std::move(x.logger_);
 
@@ -80,7 +74,8 @@ connection::~connection() {
   if (connection_->is_open()) {
     connection_->close();
   }
-  backend_provider::instance().destroy_connection(connection_info_.type, connection_.release());
+  connection_impl* impl = connection_.release();
+  backend_provider::instance().destroy_connection(impl->info().type, impl);
   connection_ = nullptr;
 }
 
@@ -108,11 +103,11 @@ utils::result<bool, utils::error> connection::is_open() const
 
 const connection_info &connection::info() const
 {
-  return connection_info_;
+  return connection_->info();
 }
 
 std::string connection::type() const {
-  return connection_info_.type;
+  return connection_->info().type;
 }
 
 utils::result<void, utils::error> connection::begin() const {
diff --git a/source/orm/sql/connection_pool.cpp b/source/orm/sql/connection_pool.cpp
index 64c07e6..c0d5f29 100644
--- a/source/orm/sql/connection_pool.cpp
+++ b/source/orm/sql/connection_pool.cpp
@@ -58,12 +58,12 @@ connection_pool::connection_pool(const std::string& dns, size_t count)
 : info_(connection_info::parse(dns)) {
   connection_repo_.reserve(count);
   while (count) {
-    connection c(info_);
-      auto&& cc = std::move(c);
-      const auto ic = identifiable_connection{count, std::move(cc)};
-    connection_repo_.push_back(ic);
+    // connection c(info_);
+      // auto&& cc = std::move(c);
+      // const auto ic = identifiable_connection{count, std::move(cc)};
+    // connection_repo_.push_back(ic);
     // connection_repo_.emplace_back(count, std::move(cc));
-    // connection_repo_.emplace_back(count, connection{info_});
+    connection_repo_.emplace_back(count, connection{info_});
     auto &conn = connection_repo_.back();
     idle_connections_.emplace(conn.id, &conn);
     // Todo: handle result
diff --git a/test/backends/SessionTest.cpp b/test/backends/SessionTest.cpp
index f0621a5..3bbe8b8 100644
--- a/test/backends/SessionTest.cpp
+++ b/test/backends/SessionTest.cpp
@@ -30,6 +30,7 @@ TEST_CASE_METHOD(SessionFixture, "Session relation test", "[session][relation]")
   REQUIRE(f.is_ok());
 
   const auto res = ses.find<flight>(2);
+  std::cout << "res: " << res.err() << "\n";
   REQUIRE(res.is_ok());
   const auto& rf = *res;
   REQUIRE(rf->id == (*f)->id);