query compiler progress

demo/main.cpp

@@ -1,9 +1,74 @@
-#include <cstdlib>
-#include <iostream>
+#include "matador/sql/column.hpp"
+#include "matador/sql/condition.hpp"
+#include "matador/sql/schema.hpp"
+#include "matador/sql/connection.hpp"
+#include "matador/sql/entity.hpp"
+
+#include "matador/utils/access.hpp"
+
 #include <string>
 
-int main() {
-  const std::string env_var {"MATADOR_BACKENDS_PATH"};
+struct author
+{
+  unsigned long id{};
+  std::string first_name;
+  std::string last_name;
+  std::string date_of_birth;
+  unsigned short year_of_birth{};
+  bool distinguished{false};
+
+  template < typename Operator >
+  void process(Operator &op) {
+    namespace field = matador::utils::access;
+    field::primary_key(op, "id", id);
+    field::attribute(op, "first_name", first_name, 63);
+    field::attribute(op, "last_name", last_name, 63);
+    field::attribute(op, "date_of_birth", date_of_birth, 31);
+    field::attribute(op, "year_of_birth", year_of_birth);
+    field::attribute(op, "distinguished", distinguished);
+  }
+};
+
+struct book
+{
+  unsigned long id{};
+  matador::sql::entity<author> book_author;
+  std::string title;
+  unsigned short published_in{};
+
+  template < typename Operator >
+  void process(Operator &op) {
+    namespace field = matador::utils::access;
+    field::primary_key(op, "id", id);
+    field::attribute(op, "title", title, 511);
+    field::attribute(op, "published_in", published_in);
+  }
+};
+
+int main()
+{
+  using namespace matador::sql;
+  const std::string env_var{"MATADOR_BACKENDS_PATH"};
+
+  std::string dns;
+  auto s = std::make_shared<schema>();
+  connection c(dns, s);
+
+  auto books = c.query()
+    .select<book>({"author.name"})
+    .from("book")
+    .join_left("author")
+    .on("book.author_id"_col == "author.id"_col)
+    .where("book.published_in"_col < 2008 && "author.name"_col == "Michael Crichton")
+    .order_by("book.title").asc()
+    .fetch_all<book>();
+
+  // SELECT book.title, book.id, book.author_id, book.published_in, author.name
+  // FROM book
+  // INNER JOIN author ON book.author_id = author.id
+  // WHERE book.published_in < 2008 AND author.name = "Michael Crichton"
+  // ORDER BY "book.title" ASC
+
 
 //  char var[1024];
 //  size_t len{};