added connection impl class

CMakeLists.txt

@@ -5,8 +5,12 @@ set(CMAKE_CXX_STANDARD 17)
 
 include_directories(${PROJECT_SOURCE_DIR}/include)
 
+find_package(ODBC REQUIRED)
+
 add_subdirectory(src)
 add_subdirectory(test)
 
-add_executable(query main.cpp)
+add_executable(query main.cpp
+  include/matador/sql/connection_impl.hpp
+  include/matador/sql/connection_info.hpp)
 target_link_libraries(query matador)

include/matador/sql/connection.hpp

@@ -20,7 +20,7 @@ public:
   query_update_intermediate update(const std::string &table);
   query_delete_intermediate remove();
 
-  result fetch(const std::string &sql);
+  query_result<record> fetch(const std::string &sql);
   std::pair<size_t, std::string> execute(const std::string &sql);
 
 private:

include/matador/sql/connection_impl.hpp

@@ -0,0 +1,30 @@
+#ifndef QUERY_CONNECTION_IMPL_HPP
+#define QUERY_CONNECTION_IMPL_HPP
+
+#include "matador/sql/connection_info.hpp"
+
+namespace matador::sql {
+
+class connection_impl
+{
+public:
+  virtual ~connection_impl() = default;
+
+  virtual void open() = 0;
+  virtual void close() = 0;
+  virtual bool is_open() = 0;
+
+  virtual void execute(const std::string &stmt) = 0;
+  virtual void prepare(const std::string &stmt) = 0;
+
+protected:
+  explicit connection_impl(connection_info info);
+
+  [[nodiscard]] const connection_info &info() const;
+
+private:
+  connection_info info_;
+};
+
+}
+#endif //QUERY_CONNECTION_IMPL_HPP

include/matador/sql/connection_info.hpp

@@ -0,0 +1,23 @@
+#ifndef QUERY_CONNECTION_INFO_HPP
+#define QUERY_CONNECTION_INFO_HPP
+
+#include <string>
+
+namespace matador::sql {
+
+struct connection_info
+{
+  std::string type;
+  std::string user;
+  std::string password;
+  std::string hostname;
+  unsigned short port{};
+  std::string database;
+  std::string driver;
+
+  static connection_info parse(const std::string &info, unsigned short default_port = 0, const std::string &default_driver = "");
+  static std::string to_string(const connection_info &ci);
+};
+
+}
+#endif //QUERY_CONNECTION_INFO_HPP

include/matador/sql/connection_intermediates.hpp

@@ -3,7 +3,8 @@
 
 #include "matador/sql/column.hpp"
 #include "matador/sql/key_value_pair.hpp"
-#include "matador/sql/result.hpp"
+#include "matador/sql/query_result.hpp"
+#include "matador/sql/record.hpp"
 
 #include <string>
 
@@ -27,15 +28,28 @@ private:
   query_builder &query_;
 };
 
+class query_execute_finish : public query_intermediate
+{
+public:
+  using query_intermediate::query_intermediate;
+
+  std::pair<size_t, std::string> execute();
+};
+
 class query_select_finish : public query_intermediate
 {
 protected:
   using query_intermediate::query_intermediate;
 
 public:
-  result fetch_all();
+  query_result<record> fetch_all();
-  result fetch_one();
+  record fetch_one();
-  result fetch_value();
+  template<typename Type>
+  Type fetch_value()
+  {
+    auto result = fetch_all();
+    return {};
+  }
 };
 
 class query_limit_intermediate : public query_select_finish
@@ -108,14 +122,6 @@ public:
 
 };
 
-class query_execute_finish : public query_intermediate
-{
-public:
-  using query_intermediate::query_intermediate;
-
-  std::pair<size_t, std::string> execute();
-};
-
 class query_into_intermediate : public query_intermediate
 {
 public:
@@ -124,20 +130,12 @@ public:
   query_execute_finish values(std::initializer_list<any_type> values);
 };
 
-class query_create_drop_finish : public query_intermediate
-{
-public:
-  using query_intermediate::query_intermediate;
-
-  void execute();
-};
-
 class query_create_intermediate : query_intermediate
 {
 public:
   using query_intermediate::query_intermediate;
 
-  query_create_drop_finish table(const std::string &table, std::initializer_list<column> columns);
+  query_execute_finish table(const std::string &table, std::initializer_list<column> columns);
 };
 
 class query_drop_intermediate : query_intermediate
@@ -145,7 +143,7 @@ class query_drop_intermediate : query_intermediate
 public:
   using query_intermediate::query_intermediate;
 
-  query_create_drop_finish table(const std::string &table);
+  query_execute_finish table(const std::string &table);
 };
 
 class query_insert_intermediate : public query_intermediate

include/matador/sql/query_result.hpp

@@ -0,0 +1,95 @@
+#ifndef QUERY_QUERY_RESULT_HPP
+#define QUERY_QUERY_RESULT_HPP
+
+#include <memory>
+
+namespace matador::sql {
+
+template < typename Type >
+class query_result;
+
+template < typename Type >
+class query_result_iterator
+{
+public:
+  using iterator_category = std::forward_iterator_tag;
+  using value_type = Type;
+  using difference_type = std::ptrdiff_t;
+  using pointer = value_type*;               /**< Shortcut for the pointer type. */
+  using reference = value_type&;             /**< Shortcut for the reference type */
+
+public:
+  query_result_iterator() = default;
+  explicit query_result_iterator(query_result<Type> &res, Type *obj = nullptr)
+  : obj_(obj)
+  , result_(res)
+  {}
+  query_result_iterator(query_result_iterator&& x) noexcept
+  : obj_(std::move(x.obj_))
+  , result_(x.result_)
+  {}
+
+  query_result_iterator& operator=(query_result_iterator&& x) noexcept
+  {
+    result_ = x.result_;
+    obj_ = std::move(x.obj_);
+    return *this;
+  }
+
+  ~query_result_iterator() = default;
+
+  bool operator==(const query_result_iterator& rhs)
+  {
+    return obj_ == rhs.obj_;
+  }
+
+  bool operator!=(const query_result_iterator& rhs)
+  {
+    return obj_ != rhs.obj_;
+  }
+
+  pointer operator->()
+  {
+    return obj_.get();
+  }
+
+  reference operator&()
+  {
+    return &obj_.get();
+  }
+
+  std::unique_ptr<Type> operator*()
+  {
+    return std::move(obj_);
+  }
+
+  pointer get()
+  {
+    return obj_.get();
+  }
+
+  pointer release()
+  {
+    return obj_.release();
+  }
+
+protected:
+  std::unique_ptr<Type> obj_;
+  query_result<Type> &result_;
+};
+
+template < typename Type >
+class query_result
+{
+public:
+  query_result(std::string sql) : sql_(std::move(sql)) {}
+
+  [[nodiscard]] const std::string& str() const { return sql_; }
+
+  Type begin() { return {}; }
+private:
+  std::string sql_;
+};
+
+}
+#endif //QUERY_QUERY_RESULT_HPP

include/matador/sql/record.hpp

@@ -0,0 +1,56 @@
+#ifndef QUERY_RECORD_HPP
+#define QUERY_RECORD_HPP
+
+#include "matador/sql/column.hpp"
+
+#include <vector>
+#include <unordered_map>
+
+namespace matador::sql {
+
+class record
+{
+private:
+  using column_by_index = std::vector<column>;
+  using column_index_pair = std::pair<std::reference_wrapper<column>, size_t>;
+  using column_by_name_map = std::unordered_map<std::string, column_index_pair>;
+
+public:
+  using iterator = column_by_index::iterator;
+  using const_iterator = column_by_index::const_iterator;
+
+  record() = default;
+  record(std::initializer_list<column> columns);
+  ~record() = default;
+
+  template < typename Type >
+  void append(const std::string &name, long size = -1)
+  {
+    append(make_column<Type>(name, size));
+  }
+
+  void append(column col);
+
+  [[nodiscard]] const column& at(const std::string &name) const;
+  const column& at(size_t index);
+
+  iterator find(const std::string &column_name);
+  const_iterator find(const std::string &column_name) const;
+
+  iterator begin();
+  [[nodiscard]] const_iterator begin() const;
+  [[nodiscard]] const_iterator cbegin() const;
+
+  iterator end();
+  [[nodiscard]] const_iterator end() const;
+  [[nodiscard]] const_iterator cend() const;
+
+  [[nodiscard]] size_t size() const;
+
+private:
+  column_by_index columns_;
+  column_by_name_map columns_by_name_;
+};
+
+}
+#endif //QUERY_RECORD_HPP

src/CMakeLists.txt

@@ -5,7 +5,10 @@ set(SQL_SOURCES
   sql/key_value_pair.cpp
   sql/basic_condition.cpp
   sql/connection.cpp
-  sql/connection_intermediates.cpp)
+  sql/connection_intermediates.cpp
+  sql/record.cpp
+  sql/connection_info.cpp
+  sql/connection_impl.cpp)
 
 set(SQL_HEADER
   ../include/matador/sql/dialect.hpp
@@ -17,7 +20,11 @@ set(SQL_HEADER
   ../include/matador/sql/condition.hpp
   ../include/matador/sql/connection.hpp
   ../include/matador/sql/connection_intermediates.hpp
-  ../include/matador/sql/result.hpp)
+  ../include/matador/sql/result.hpp
+  ../include/matador/sql/record.hpp
+  ../include/matador/sql/query_result.hpp
+  ../include/matador/sql/connection_impl.hpp
+  ../include/matador/sql/connection_info.hpp)
 
 set(UTILS_HEADER
   ../include/matador/utils/field_attributes.hpp

src/sql/connection.cpp

@@ -36,7 +36,7 @@ query_delete_intermediate connection::remove()
   return query_delete_intermediate{*this, query_.remove()};
 }
 
-result connection::fetch(const std::string &sql)
+query_result<record> connection::fetch(const std::string &sql)
 {
   return {sql};
 }

src/sql/connection_impl.cpp

@@ -0,0 +1,14 @@
+#include <utility>
+
+#include "matador/sql/connection_impl.hpp"
+
+namespace matador::sql {
+
+connection_impl::connection_impl(connection_info info)
+: info_(std::move(info)){}
+
+const connection_info &connection_impl::info() const {
+  return info_;
+}
+
+}

src/sql/connection_info.cpp

@@ -0,0 +1,72 @@
+#include "matador/sql/connection_info.hpp"
+
+#include <regex>
+
+namespace matador::sql {
+
+connection_info connection_info::parse(const std::string &info, unsigned short default_port, const std::string &default_driver) {
+  static const std::regex DNS_RGX (R"((\w+):\/\/((([\w]+)(:([\w!]+))?)@)?((((([\w.\(\)\\]+)([:]([\d]+))?)?)\/)?(([\w.]+)( \((.*)\))?)))");
+
+  std::smatch what;
+
+  if (!std::regex_match(info, what, DNS_RGX)) {
+    throw std::logic_error("connect invalid dns: " + info);
+  }
+
+  connection_info ci{};
+  ci.type = what[1].str();
+  ci.user = what[4].str();
+  ci.password = what[6].str();
+
+  // get connection part
+  ci.hostname = what[11].str();
+  if (what[13].matched) {
+    char *end;
+    ci.port = static_cast<unsigned short>(std::strtoul(what[13].str().c_str(), &end, 10));
+  } else {
+    ci.port = default_port;
+  }
+
+  // Should we just ignore the "instance" part?
+  // const std::string instance = what[5].str();
+  ci.database = what[15].str();
+
+  if (what[17].matched) {
+    ci.driver = what[17].str();
+  } else {
+    ci.driver = default_driver;
+  }
+
+  return ci;
+}
+
+std::string connection_info::to_string(const connection_info &ci) {
+  std::string dns{ci.type};
+  dns += "://";
+
+  if (!ci.user.empty()) {
+    dns += ci.user;
+    if (!ci.password.empty()) {
+      dns += ":" + ci.password;
+    }
+  }
+
+  if (!ci.hostname.empty()) {
+    dns += "@" + ci.hostname;
+    if (ci.port > 0) {
+      dns += ":" + std::to_string(ci.port);
+    }
+  }
+
+  if (!dns.empty()) {
+    dns += "/";
+  }
+  dns += ci.database;
+
+  if (!ci.driver.empty()) {
+    dns += " (" + ci.driver +")";
+  }
+  return dns;
+}
+
+}

src/sql/connection_intermediates.cpp

@@ -13,19 +13,14 @@ query_builder &query_intermediate::query()
   return query_;
 }
 
-result query_select_finish::fetch_all()
+query_result<record> query_select_finish::fetch_all()
 {
   return db().fetch(query().compile());
 }
 
-result query_select_finish::fetch_one()
+record query_select_finish::fetch_one()
 {
-  return db().fetch(query().compile());
+  return db().fetch(query().compile()).begin();
-}
-
-result query_select_finish::fetch_value()
-{
-  return db().fetch(query().compile());
 }
 
 query_intermediate::query_intermediate(connection &db, query_builder &query)
@@ -106,17 +101,12 @@ query_execute_finish query_into_intermediate::values(std::initializer_list<any_t
   return {db(), query().values(values)};
 }
 
-void query_create_drop_finish::execute()
+query_execute_finish query_create_intermediate::table(const std::string &table, std::initializer_list<column> columns)
-{
-  db().execute(query().compile());
-}
-
-query_create_drop_finish query_create_intermediate::table(const std::string &table, std::initializer_list<column> columns)
 {
   return {db(), query().table(table, columns)};
 }
 
-query_create_drop_finish query_drop_intermediate::table(const std::string &table)
+query_execute_finish query_drop_intermediate::table(const std::string &table)
 {
   return {db(), query().table(table)};
 }

src/sql/record.cpp

@@ -0,0 +1,75 @@
+#include "matador/sql/record.hpp"
+
+namespace matador::sql {
+
+record::record(std::initializer_list<column> columns)
+: columns_(columns) {
+  size_t index{0};
+  for(auto &col : columns_) {
+    columns_by_name_.emplace(col.name(), column_index_pair {std::ref(col), index++});
+  }
+}
+
+const column &record::at(const std::string &name) const
+{
+  return columns_by_name_.at(name).first;
+}
+
+const column &record::at(size_t index)
+{
+  return columns_.at(index);
+}
+
+record::iterator record::find(const std::string &column_name)
+{
+  auto it = columns_by_name_.find(column_name);
+  return it != columns_by_name_.end() ? columns_.begin() + it->second.second : columns_.end();
+}
+
+record::const_iterator record::find(const std::string &column_name) const {
+  auto it = columns_by_name_.find(column_name);
+  return it != columns_by_name_.end() ? columns_.begin() + it->second.second : columns_.end();
+}
+
+void record::append(column col)
+{
+  auto &ref = columns_.emplace_back(std::move(col));
+  columns_by_name_.emplace(ref.name(), column_index_pair{std::ref(ref), columns_.size()-1});
+}
+
+record::iterator record::begin()
+{
+  return columns_.begin();
+}
+
+record::const_iterator record::begin() const
+{
+  return columns_.begin();
+}
+
+record::const_iterator record::cbegin() const
+{
+  return columns_.cbegin();
+}
+
+record::iterator record::end()
+{
+  return columns_.end();
+}
+
+record::const_iterator record::end() const
+{
+  return columns_.end();
+}
+
+record::const_iterator record::cend() const
+{
+  return columns_.cend();
+}
+
+size_t record::size() const
+{
+  return columns_.size();
+}
+
+}

test/CMakeLists.txt

@@ -9,6 +9,7 @@ FetchContent_Declare(
 FetchContent_MakeAvailable(Catch2)
 
 add_executable(tests builder.cpp
-  connection.cpp)
+  connection.cpp
+  record.cpp)
 target_link_libraries(tests PRIVATE Catch2::Catch2WithMain matador)
 target_include_directories(tests PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>/include)

test/connection.cpp

@@ -9,7 +9,7 @@ using namespace matador::sql;
 TEST_CASE("Execute create table statement", "[connection]") {
   connection c;
 
-  c.create()
+  const auto res = c.create()
    .table("person", {
      make_pk_column<unsigned long>("id"),
      make_column<std::string>("name", 255),
@@ -17,17 +17,17 @@ TEST_CASE("Execute create table statement", "[connection]") {
    }).execute();
 
   REQUIRE(true);
-//  REQUIRE(res.sql == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8)");
+  REQUIRE(res.second == R"(CREATE TABLE "person" ("id" BIGINT NOT NULL PRIMARY KEY, "name" VARCHAR(255), "age" INTEGER))");
 }
 
 TEST_CASE("Execute drop table statement", "[connection]") {
   connection c;
 
-  c.drop()
+  const auto res = c.drop()
-   .table("person").execute();
+                    .table("person")
+                    .execute();
 
-  REQUIRE(true);
+  REQUIRE(res.second == R"(DROP TABLE "person")");
-//  REQUIRE(res.sql == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8)");
 }
 
 TEST_CASE("Execute select statement with where clause", "[connection]") {
@@ -38,7 +38,7 @@ TEST_CASE("Execute select statement with where clause", "[connection]") {
               .where("id"_col == 8)
               .fetch_all();
 
-  REQUIRE(res.sql == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8)");
+  REQUIRE(res.str() == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8)");
 }
 
 TEST_CASE("Execute select statement with order by", "[connection]") {
@@ -50,7 +50,7 @@ TEST_CASE("Execute select statement with order by", "[connection]") {
               .order_by("name").desc()
               .fetch_all();
 
-  REQUIRE(res.sql == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8 ORDER BY "name" DESC)");
+  REQUIRE(res.str() == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8 ORDER BY "name" DESC)");
 }
 
 TEST_CASE("Execute select statement with group by and order by", "[connection]") {
@@ -63,7 +63,7 @@ TEST_CASE("Execute select statement with group by and order by", "[connection]")
               .order_by("name").asc()
               .fetch_all();
 
-  REQUIRE(res.sql == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8 GROUP BY "color" ORDER BY "name" ASC)");
+  REQUIRE(res.str() == R"(SELECT "id", "name", "color" FROM "person" WHERE "id" = 8 GROUP BY "color" ORDER BY "name" ASC)");
 }
 
 TEST_CASE("Execute insert statement", "[connection]") {

test/record.cpp

@@ -0,0 +1,49 @@
+#include <catch2/catch_test_macros.hpp>
+
+#include <matador/sql/record.hpp>
+
+#include <list>
+
+using namespace matador::sql;
+
+TEST_CASE("Create record", "[record]") {
+  record rec({
+           make_pk_column<unsigned long>("id"),
+           make_column<std::string>("name", 255),
+           make_column<std::string>("color", 255)
+  });
+
+  REQUIRE(rec.size() == 3);
+
+  std::list<std::string> expected_columns = {"id", "name", "color"};
+  for(const auto &col : expected_columns) {
+    REQUIRE(rec.find(col) != rec.end());
+  }
+
+  for(const auto& col : rec) {
+    expected_columns.remove(col.name());
+  }
+
+  REQUIRE(expected_columns.empty());
+}
+
+TEST_CASE("Append to record", "[record]") {
+  record rec;
+
+  rec.append(make_pk_column<unsigned long>("id"));
+  rec.append<std::string>("name", 255);
+  rec.append<std::string>("color", 63);
+
+  REQUIRE(rec.size() == 3);
+
+  std::list<std::string> expected_columns = {"id", "name", "color"};
+  for(const auto &col : expected_columns) {
+    REQUIRE(rec.find(col) != rec.end());
+  }
+
+  for(const auto& col : rec) {
+    expected_columns.remove(col.name());
+  }
+
+  REQUIRE(expected_columns.empty());
+}