diff --git a/include/matador/object/attribute.hpp b/include/matador/object/attribute.hpp
index 08d08d0..25b7b3b 100644
--- a/include/matador/object/attribute.hpp
+++ b/include/matador/object/attribute.hpp
@@ -15,7 +15,6 @@ enum class null_option_type : uint8_t {
 };
 
 class object;
-class attribute_generator;
 
 class attribute {
 public:
@@ -65,7 +64,6 @@ public:
 
 private:
   friend class object;
-  friend class attribute_generator;
   friend class object_generator;
 
   std::string name_;
diff --git a/include/matador/object/attribute_generator.hpp b/include/matador/object/attribute_generator.hpp
deleted file mode 100644
index 18fbb18..0000000
--- a/include/matador/object/attribute_generator.hpp
+++ /dev/null
@@ -1,157 +0,0 @@
-#ifndef QUERY_COLUMN_DEFINITION_GENERATOR_HPP
-#define QUERY_COLUMN_DEFINITION_GENERATOR_HPP
-
-#include "matador/object/attribute.hpp"
-
-#include "matador/utils/access.hpp"
-#include "matador/utils/data_type_traits.hpp"
-#include "matador/utils/error.hpp"
-#include "matador/utils/field_attributes.hpp"
-#include "matador/utils/identifier.hpp"
-#include "matador/utils/primary_key_attribute.hpp"
-#include "matador/utils/result.hpp"
-
-#include <memory>
-#include <typeindex>
-#include <vector>
-
-namespace matador::object {
-
-class repository;
-
-class fk_attribute_generator
-{
-public:
-  fk_attribute_generator() = default;
-
-  template<class Type>
-  attribute generate(const char *id, Type &x) {
-    access::process(*this, x);
-    return attribute{id, type_, {utils::constraints::ForeignKey }, null_option_type::NotNull};
-  }
-
-  template<typename ValueType>
-  void on_primary_key(const char *, ValueType &/*pk*/, const utils::primary_key_attribute& attr = utils::default_pk_attributes) {
-    type_ = utils::data_type_traits<ValueType>::type(attr.size());
-  }
-  static void on_revision(const char * /*id*/, uint64_t &/*rev*/) {}
-  template < class Type >
-  static void on_attribute(const char * /*id*/, Type &/*x*/, const utils::field_attributes &/*attr*/ = utils::null_attributes) {}
-  static void on_attribute(const char * /*id*/, char * /*x*/, const utils::field_attributes &/*attr*/ = utils::null_attributes) {}
-  template<class Pointer>
-  static void on_belongs_to(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
-  template<class Pointer>
-  static void on_has_one(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
-  template<class ContainerType>
-  static void on_has_many(const char * /*id*/, ContainerType &, const char *, const utils::foreign_attributes &/*attr*/) {}
-  template<class ContainerType>
-  static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes &/*attr*/) {}
-  template<class ContainerType>
-  static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const utils::foreign_attributes &/*attr*/) {}
-
-private:
-  utils::basic_type type_{};
-};
-
-class attribute_generator final {
-private:
-  attribute_generator(std::vector<attribute> &columns, const repository &repo, const std::shared_ptr<object>& obj);
-
-public:
-  ~attribute_generator() = default;
-
-  template < class Type >
-  static std::vector<attribute> generate(const repository &repo, const std::shared_ptr<object> &obj) {
-    Type t;
-    return generate(t, repo, obj);
-  }
-
-  template < class Type >
-  static std::vector<attribute> generate(const Type& t, const repository &repo, const std::shared_ptr<object> &obj) {
-    std::vector<attribute> columns;
-    attribute_generator gen(columns, repo, obj);
-    access::process(gen, t);
-    return columns;
-  }
-
-  template < class Type >
-  void on_primary_key(const char *, Type &x, const utils::primary_key_attribute& attr = utils::default_pk_attributes);
-  void on_revision(const char *id, uint64_t &rev);
-
-  template<typename Type>
-  void on_attribute(const char *id, Type &x, const utils::field_attributes &attr = utils::null_attributes);
-
-  template<typename Type>
-  void on_attribute(const char *id, std::optional<Type> &x, const utils::field_attributes &attr = utils::null_attributes);
-
-  template<class Pointer>
-  void on_belongs_to(const char *id, Pointer &x, const utils::foreign_attributes &/*attr*/) {
-    on_foreign_key(id, x);
-  }
-  template<class Pointer>
-  static void on_has_one(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
-
-  template <class Pointer>
-  void on_foreign_key(const char *id, Pointer &x) {
-    attribute* ref_column;
-    std::type_index ti = typeid(typename Pointer::value_type);
-    if (auto result = determine_foreign_ref(std::type_index(ti))) {
-        ref_column = *result;
-    } else {
-        ref_column = nullptr;
-        insert_missing_reference_column(ti, ref_column);
-    }
-    if (x.empty()) {
-      typename Pointer::value_type temp_val;
-      columns_.push_back(fk_column_generator_.generate(id, temp_val));
-    } else {
-      columns_.push_back(fk_column_generator_.generate(id, *x));
-    }
-  }
-  template<class ContainerType>
-  static void on_has_many(const char * /*id*/, ContainerType &, const char *, const utils::foreign_attributes &/*attr*/) {}
-  template<class ContainerType>
-  static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes &/*attr*/) {}
-  template<class ContainerType>
-  static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const utils::foreign_attributes &/*attr*/) {}
-
-private:
-  [[nodiscard]] utils::result<attribute*, utils::error> determine_foreign_ref(const std::type_index &ti) const;
-  void insert_missing_reference_column(const std::type_index &ti, attribute* ref_column) const;
-
-  template<typename ValueType>
-  attribute &emplace_attribute(const char *id, const utils::field_attributes& attr, null_option_type null_option) {
-    auto &ref = columns_.emplace_back(id, utils::data_type_traits<ValueType>::type(attr.size()), attr, null_option);
-    ref.owner_ = obj_;
-    return ref;
-  }
-
-  void prepare_primary_key(attribute &ref, utils::identifier &&pk) const;
-
-private:
-  size_t index_ = 0;
-  std::vector<attribute> &columns_;
-  const repository &repo_;
-  const std::shared_ptr<object> obj_;
-
-  fk_attribute_generator fk_column_generator_;
-};
-
-template<typename ValueType>
-void attribute_generator::on_primary_key(const char *id, ValueType &x, const utils::primary_key_attribute& attr) {
-  auto &ref = emplace_attribute<ValueType>(id, { attr.size(), utils::constraints::PrimaryKey }, null_option_type::NotNull);
-  prepare_primary_key(ref, utils::identifier(x));
-}
-
-template<typename Type>
-void attribute_generator::on_attribute(const char *id, Type &/*x*/, const utils::field_attributes &attr) {
-  std::ignore = emplace_attribute<Type>(id, attr, null_option_type::NotNull);
-}
-
-template<typename Type>
-void attribute_generator::on_attribute(const char *id, std::optional<Type> & /*x*/, const utils::field_attributes &attr) {
-  std::ignore = emplace_attribute<Type>(id, attr, null_option_type::Nullable);
-}
-
-}
-#endif //QUERY_COLUMN_DEFINITION_GENERATOR_HPP
diff --git a/include/matador/object/constraints_generator.hpp b/include/matador/object/constraints_generator.hpp
deleted file mode 100644
index c914dc8..0000000
--- a/include/matador/object/constraints_generator.hpp
+++ /dev/null
@@ -1,78 +0,0 @@
-#ifndef MATADOR_CONSTRAINTS_GENERATOR_HPP
-#define MATADOR_CONSTRAINTS_GENERATOR_HPP
-
-#include "matador/object/restriction.hpp"
-
-#include "matador/utils/access.hpp"
-#include "matador/utils/field_attributes.hpp"
-#include "matador/utils/primary_key_attribute.hpp"
-
-#include <list>
-#include <typeindex>
-
-namespace matador::object {
-class object;
-class basic_object_info;
-class repository;
-
-class constraints_generator final {
-private:
-    constraints_generator(std::list<class restriction> &constraints, const repository &repo, const std::shared_ptr<object> &obj);
-
-public:
-    constraints_generator() = delete;
-
-    template < typename Type >
-    static std::list<class restriction> generate(const repository &repo, const std::shared_ptr<object> &obj) {
-        Type t;
-        return generate(t, repo, obj);
-    }
-
-    template < typename Type >
-    static std::list<class restriction> generate(const Type& t, const repository &repo, const std::shared_ptr<object> &obj) {
-        std::list<class restriction> constraints;
-        constraints_generator gen(constraints, repo, obj);
-        access::process(gen, t);
-        return constraints;
-    }
-
-    template < class Type >
-    void on_primary_key(const char *id, Type &/*x*/, const utils::primary_key_attribute& /*attr*/ = utils::default_pk_attributes) {
-      create_pk_constraint(id);
-    }
-    static void on_revision(const char * /*id*/, uint64_t &/*rev*/) {}
-    template<typename Type>
-    void on_attribute(const char *id, Type &/*x*/, const utils::field_attributes &attr = utils::null_attributes) {
-      if (utils::is_constraint_set(attr.options() ,utils::constraints::Unique)) {
-        create_unique_constraint(id);
-      }
-    }
-
-    template<class Pointer>
-    void on_belongs_to(const char *id, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {
-      create_fk_constraint( typeid(typename Pointer::value_type), id);
-    }
-    template<class Pointer>
-    static void on_has_one(const char * /*id*/, Pointer &/*x*/, const utils::foreign_attributes &/*attr*/) {}
-    template<class ContainerType>
-    static void on_has_many(const char * /*id*/, ContainerType &, const char *, const utils::foreign_attributes &/*attr*/) {}
-    template<class ContainerType>
-    static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const char * /*join_column*/, const char * /*inverse_join_column*/, const utils::foreign_attributes &/*attr*/) {}
-    template<class ContainerType>
-    static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const utils::foreign_attributes &/*attr*/) {}
-
-private:
-    void create_pk_constraint(const std::string& name) const;
-    void create_fk_constraint(const std::type_index& ti, const std::string& name) const;
-    void create_unique_constraint(const std::string& name) const;
-
-    [[nodiscard]] std::list<attribute>::iterator find_attribute_by_name(const std::string &name) const;
-
-private:
-    std::list<class restriction> &constraints_;
-    const repository &repo_;
-    std::shared_ptr<object> obj_;
-};
-}
-
-#endif //MATADOR_CONSTRAINTS_GENERATOR_HPP
\ No newline at end of file
diff --git a/include/matador/object/object.hpp b/include/matador/object/object.hpp
index 6d9918d..4dff4f9 100644
--- a/include/matador/object/object.hpp
+++ b/include/matador/object/object.hpp
@@ -38,7 +38,6 @@ public:
   friend std::ostream& operator<<(std::ostream& os, const object& obj);
 
 private:
-  friend class constraints_generator;
   friend class attribute_generator;
   friend class object_generator;
 
@@ -46,7 +45,7 @@ private:
   attribute* pk_attribute_{nullptr};
   utils::identifier pk_identifier_;
   std::list<attribute> attributes_;
-  std::list<class restriction> constraints_;
+  std::list<restriction> constraints_;
 };
 }
 #endif //MATADOR_OBJECT_HPP
\ No newline at end of file
diff --git a/include/matador/object/repository.hpp b/include/matador/object/repository.hpp
index 11b4eb6..3236f45 100644
--- a/include/matador/object/repository.hpp
+++ b/include/matador/object/repository.hpp
@@ -189,7 +189,6 @@ private:
 private:
   friend class internal::shadow_repository;
   friend class repository_node;
-  friend class attribute_generator;
   template < typename NodeType >
   friend class foreign_node_completer;
   friend class object_generator;
diff --git a/include/matador/object/repository_node.hpp b/include/matador/object/repository_node.hpp
index 0638642..a2ecb3a 100644
--- a/include/matador/object/repository_node.hpp
+++ b/include/matador/object/repository_node.hpp
@@ -1,10 +1,12 @@
 #ifndef SCHEMA_NODE_HPP
 #define SCHEMA_NODE_HPP
 
-#include "matador/object/attribute_generator.hpp"
 #include "matador/object/object_generator.hpp"
 #include "matador/object/object_info.hpp"
 
+#include "matador/utils/error.hpp"
+#include "matador/utils/result.hpp"
+
 #include <memory>
 
 namespace matador::object {
diff --git a/include/matador/object/restriction.hpp b/include/matador/object/restriction.hpp
index e95be7a..c8b0586 100644
--- a/include/matador/object/restriction.hpp
+++ b/include/matador/object/restriction.hpp
@@ -32,11 +32,10 @@ public:
 
   friend std::ostream& operator<<(std::ostream& os, const restriction& c);
 
-  std::string prefix() const;
+  std::string type_string() const;
 
 private:
   friend class constraint_builder;
-  friend class constraints_generator;
   friend class object_generator;
   friend class object;
 
diff --git a/source/core/CMakeLists.txt b/source/core/CMakeLists.txt
index dbf433c..386f137 100644
--- a/source/core/CMakeLists.txt
+++ b/source/core/CMakeLists.txt
@@ -14,9 +14,7 @@ add_library(matador-core STATIC
   ../../include/matador/net/select_fd_sets.hpp
   ../../include/matador/net/socket_interrupter.hpp
   ../../include/matador/object/attribute.hpp
-  ../../include/matador/object/attribute_generator.hpp
   ../../include/matador/object/basic_object_info.hpp
-  ../../include/matador/object/constraints_generator.hpp
   ../../include/matador/object/error_code.hpp
   ../../include/matador/object/foreign_node_completer.hpp
   ../../include/matador/object/internal/shadow_repository.hpp
@@ -79,9 +77,7 @@ add_library(matador-core STATIC
   logger/logger.cpp
   logger/rotating_file_sink.cpp
   object/attribute.cpp
-  object/attribute_generator.cpp
   object/basic_object_info.cpp
-  object/constraints_generator.cpp
   object/error_code.cpp
   object/foreign_node_completer.cpp
   object/internal/shadow_repository.cpp
diff --git a/source/core/object/attribute_generator.cpp b/source/core/object/attribute_generator.cpp
deleted file mode 100644
index 1c0715e..0000000
--- a/source/core/object/attribute_generator.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "matador/object/attribute_generator.hpp"
-#include "matador/object/repository.hpp"
-#include "matador/object/object.hpp"
-
-namespace matador::object {
-
-attribute_generator::attribute_generator(std::vector<attribute> &columns, const repository &repo, const std::shared_ptr<object> &obj)
-: columns_(columns)
-, repo_(repo)
-, obj_(obj)
-{}
-
-void attribute_generator::on_revision(const char *id, uint64_t &rev) {
-  on_attribute(id, rev);
-}
-
-utils::result<attribute*, utils::error> attribute_generator::determine_foreign_ref(const std::type_index &ti) const {
-  return repo_.primary_key_attribute(ti);
-}
-
-void attribute_generator::insert_missing_reference_column(const std::type_index& ti, attribute* ref_column) const {
-  const_cast<repository&>(repo_).missing_references_.insert({ti, ref_column});
-}
-
-void attribute_generator::prepare_primary_key(attribute& ref, utils::identifier &&pk) const {
-  obj_->pk_attribute_ = &ref;
-  obj_->pk_identifier_ = std::move(pk);
-}
-}
\ No newline at end of file
diff --git a/source/core/object/constraints_generator.cpp b/source/core/object/constraints_generator.cpp
deleted file mode 100644
index caf948c..0000000
--- a/source/core/object/constraints_generator.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-#include "matador/object/constraints_generator.hpp"
-#include "matador/object/object.hpp"
-#include "matador/object/repository.hpp"
-
-#include <algorithm>
-
-namespace matador::object {
-constraints_generator::constraints_generator(std::list<class restriction> &constraints, const repository& repo, const std::shared_ptr<object> &obj)
-: constraints_(constraints)
-, repo_(repo)
-, obj_(obj) {}
-
-void constraints_generator::create_pk_constraint(const std::string& name) const {
-  restriction pk_constraint("PK_" + obj_->name());
-  pk_constraint.options_ |= utils::constraints::PrimaryKey;
-  if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(obj_->attributes_)) {
-      pk_constraint.attr_ = &*pk_attr;
-  }
-  pk_constraint.owner_ = obj_;
-  constraints_.emplace_back(std::move(pk_constraint));
-}
-
-void constraints_generator::create_fk_constraint(const std::type_index& ti, const std::string& name) const {
-  const auto result = repo_.basic_info(ti);
-  if (!result) {
-    return;
-  }
-  restriction pk_constraint("FK_" + obj_->name() + "_" + name);
-  pk_constraint.options_ |= utils::constraints::ForeignKey;
-  if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(obj_->attributes_)) {
-    pk_constraint.attr_ = &*pk_attr;
-  }
-  pk_constraint.owner_ = obj_;
-  constraints_.emplace_back(std::move(pk_constraint));
-}
-
-void constraints_generator::create_unique_constraint(const std::string& name) const {
-  class restriction pk_constraint("UK_" + obj_->name() + "_" + name);
-  pk_constraint.options_ |= utils::constraints::Unique;
-  if (const auto pk_attr = find_attribute_by_name(name); pk_attr != std::end(obj_->attributes_)) {
-    pk_constraint.attr_ = &*pk_attr;
-  }
-  pk_constraint.owner_ = obj_;
-}
-
-std::list<attribute>::iterator constraints_generator::find_attribute_by_name(const std::string& name) const {
-  return std::find_if(std::begin(obj_->attributes_), std::end(obj_->attributes_), [&name](const attribute& elem) {
-    return elem.name() == name;
-  });
-}
-}
\ No newline at end of file
diff --git a/source/core/object/object_generator.cpp b/source/core/object/object_generator.cpp
index b2666d3..655e892 100644
--- a/source/core/object/object_generator.cpp
+++ b/source/core/object/object_generator.cpp
@@ -66,7 +66,7 @@ void object_generator::prepare_primary_key(attribute& ref, utils::identifier &&p
     object_->pk_identifier_ = std::move(pk);
 }
 
-std::shared_ptr<class object> object_generator::fk_object(const std::type_index& ti) const {
+std::shared_ptr<object> object_generator::fk_object(const std::type_index& ti) const {
   const auto result = repo_.basic_info(ti);
   if (result) {
     return result->get().object();
diff --git a/source/core/object/restriction.cpp b/source/core/object/restriction.cpp
index 47cad89..d1d40be 100644
--- a/source/core/object/restriction.cpp
+++ b/source/core/object/restriction.cpp
@@ -8,7 +8,7 @@ restriction::restriction(std::string name)
 : name_(std::move(name)) {}
 
 std::string restriction::name() const {
-  return prefix() + name_;
+  return type_string() + name_;
 }
 
 const class attribute* restriction::attribute() const {
@@ -55,21 +55,21 @@ const std::string& restriction::ref_column_name() const {
 }
 
 std::ostream & operator<<(std::ostream &os, const class restriction &c) {
-  os << "constraint " << c.name() << " for column " << c.column_name();
+  os << "constraint " << c.type_string() << " for column " << c.column_name();
   return os;
 }
 
-std::string restriction::prefix() const {
+std::string restriction::type_string() const {
     if (utils::is_constraint_set(options_, utils::constraints::PrimaryKey)) {
-        return "PK_";
+        return "PrimaryKey";
     }
     if (utils::is_constraint_set(options_, utils::constraints::ForeignKey)) {
-        return "FK_";
+        return "ForeignKey";
     }
     if (utils::is_constraint_set(options_, utils::constraints::Unique)) {
-        return "UK_";
+        return "Unique";
     }
-    return "";
+    return "Unknown";
 }
 
 // constraint_builder & constraint_builder::constraint(std::string name) {
diff --git a/test/core/CMakeLists.txt b/test/core/CMakeLists.txt
index 6052fcb..ac5d94d 100644
--- a/test/core/CMakeLists.txt
+++ b/test/core/CMakeLists.txt
@@ -5,7 +5,6 @@ list(APPEND CMAKE_MODULE_PATH ${catch2_SOURCE_DIR}/extras)
 add_executable(CoreTests
   ../backends/SchemaFixture.hpp
   logger/LoggerTest.cpp
-  object/AttributeGeneratorTest.cpp
   object/ObjectTest.cpp
   object/PrimaryKeyResolverTest.cpp
   object/SchemaTest.cpp
diff --git a/test/core/object/AttributeGeneratorTest.cpp b/test/core/object/AttributeGeneratorTest.cpp
deleted file mode 100644
index dbb34b9..0000000
--- a/test/core/object/AttributeGeneratorTest.cpp
+++ /dev/null
@@ -1,64 +0,0 @@
-#include <catch2/catch_test_macros.hpp>
-
-#include "matador/object/attribute_generator.hpp"
-#include "matador/object/object.hpp"
-#include "matador/object/repository.hpp"
-
-#include "../test/models/product.hpp"
-#include "../test/models/optional.hpp"
-
-using namespace matador::object;
-using namespace matador::utils;
-
-TEST_CASE("Generate column definitions from object", "[column][definition][generator]") {
-  repository repo("main");
-
-  auto result = repo.attach<matador::test::product>("products")
-    .and_then([&repo] { return repo.attach<matador::test::supplier>("supplier"); })
-    .and_then([&repo] { return repo.attach<matador::test::category>("categories"); });
-  REQUIRE(result);
-
-  auto obj = std::make_shared<object>("products");
-  auto columns = attribute_generator::generate<matador::test::product>(repo, obj);
-
-  const std::vector expected_columns = {
-    attribute{"product_name", basic_type::Varchar, constraints::PrimaryKey, null_option_type::NotNull },
-    attribute{"supplier_id", basic_type::UInt32, constraints::ForeignKey, null_option_type::NotNull },
-    attribute{"category_id", basic_type::UInt32, constraints::ForeignKey, null_option_type::NotNull },
-    attribute{"quantity_per_unit", basic_type::Varchar, null_attributes, null_option_type::NotNull },
-    attribute{"unit_price", basic_type::UInt32, null_attributes, null_option_type::NotNull },
-    attribute{"units_in_stock", basic_type::UInt32, null_attributes, null_option_type::NotNull },
-    attribute{"units_in_order", basic_type::UInt32, null_attributes, null_option_type::NotNull },
-    attribute{"reorder_level", basic_type::UInt32, null_attributes, null_option_type::NotNull },
-    attribute{"discontinued", basic_type::Boolean, null_attributes, null_option_type::NotNull }
-  };
-  REQUIRE(!columns.empty());
-  REQUIRE(columns.size() == expected_columns.size());
-
-  for (size_t i = 0; i != expected_columns.size(); ++i) {
-    REQUIRE(expected_columns[i].name() == columns[i].name());
-    REQUIRE(expected_columns[i].attributes().options() == columns[i].attributes().options() );
-    REQUIRE(expected_columns[i].type() == columns[i].type() );
-  }
-}
-
-TEST_CASE("Generate columns from object with nullable columns", "[column generator]") {
-  repository repo("main");
-
-  auto obj = std::make_shared<object>("optionals");
-  auto columns = attribute_generator::generate<matador::test::optional>(repo, obj);
-
-  const std::vector expected_columns = {
-    attribute{"id", basic_type::UInt32, constraints::PrimaryKey, null_option_type::NotNull },
-    attribute{"name", basic_type::Varchar, null_attributes, null_option_type::NotNull },
-    attribute{"age", basic_type::UInt32, null_attributes, null_option_type::NotNull }
-  };
-  REQUIRE(!columns.empty());
-  REQUIRE(columns.size() == expected_columns.size());
-
-  for (size_t i = 0; i != expected_columns.size(); ++i) {
-    REQUIRE(expected_columns[i].name() == columns[i].name());
-    REQUIRE(expected_columns[i].attributes().options() == columns[i].attributes().options() );
-    REQUIRE(expected_columns[i].type() == columns[i].type() );
-  }
-}
\ No newline at end of file