backend tests progress

src/sql/record.cpp

@@ -16,6 +16,30 @@ record::record(const std::vector<column> &columns)
   init();
 }
 
+record::record(const record &x)
+: columns_(x.columns_)
+, pk_index_(x.pk_index_)
+{
+  for (auto& col : columns_) {
+    add_to_map(col, col.index());
+  }
+}
+
+record &record::operator=(const record &x)
+{
+  if (&x == this) {
+    return *this;
+  }
+
+  columns_ = x.columns_;
+  columns_by_name_.clear();
+  pk_index_ = x.pk_index_;
+  for (auto& col : columns_) {
+    add_to_map(col, col.index());
+  }
+  return *this;
+}
+
 const std::vector<column> &record::columns() const
 {
   return columns_;
@@ -37,6 +61,7 @@ const column &record::primary_key() const
 
 const column &record::at(const std::string &name) const
 {
+  auto ref = columns_by_name_.at(name).first;
   return columns_by_name_.at(name).first;
 }