handle many-to-many relations separately when process entities

src/CMakeLists.txt

@@ -91,6 +91,7 @@ set(SQL_HEADER
   ../include/matador/sql/field.hpp
   ../include/matador/sql/entity_query_builder.hpp
   ../include/matador/sql/table_definition.hpp
+  ../include/matador/sql/has_many_to_many_relation.hpp
 )
 
 set(QUERY_SOURCES

src/sql/condition.cpp

@@ -6,7 +6,7 @@ condition<column, placeholder, std::enable_if<true>::type>::condition(const colu
 : basic_column_condition(fld, op), value(val)
 {}
 
-std::string condition<column, placeholder, std::enable_if<true>::type>::evaluate(dialect &d, query_context &query) const
+std::string condition<column, placeholder, std::enable_if<true>::type>::evaluate(const dialect &d, query_context &query) const
 {
   query.bind_vars.emplace_back(field_.name);
   return d.prepare_identifier(field_) + " " + operand + " " + d.next_placeholder(query.bind_vars);
@@ -16,7 +16,7 @@ condition<column, query_context>::condition(column col, basic_condition::operand
 : basic_column_condition(std::move(col), op), query_(q)
 {}
 
-std::string condition<column, query_context>::evaluate(dialect &d, query_context &query) const
+std::string condition<column, query_context>::evaluate(const dialect &d, query_context &query) const
 {
   std::string result(d.prepare_identifier(field_) + " " + operand + " (");
   result += (")");

src/sql/dialect.cpp

@@ -37,7 +37,7 @@ std::string dialect::prepare_identifier_string(const std::string &col) const
 
   for (auto &part : parts) {
     escape_quotes_in_identifier(part);
-    quote_identifier(part);
+//    quote_identifier(part);
   }
   return utils::join(parts, ".");
 }

src/sql/schema.cpp

@@ -15,7 +15,10 @@ std::string schema::name() const
 
 const table_info& schema::attach(const std::type_index ti, const table_info& table)
 {
-  return repository_.try_emplace(ti, table).first->second;
+
+  auto &ref = repository_.try_emplace(ti, table).first->second;
+  repository_by_name_.try_emplace(ref.name, std::ref(ref));
+  return ref;
 }
 
 std::optional<table_info> schema::info(std::type_index ti) const
@@ -27,6 +30,15 @@ std::optional<table_info> schema::info(std::type_index ti) const
   return it->second;
 }
 
+std::optional<table_info> schema::info(const std::string &name) const
+{
+  const auto it = repository_by_name_.find(name);
+  if (it == repository_by_name_.end()) {
+    return std::nullopt;
+  }
+  return it->second;
+}
+
 std::pair<std::string, std::string> schema::reference(const std::type_index &ti) const
 {
   const auto it = repository_.find(ti);