changed the interface of on_primary_key to have a third parameter of type primary_key_attribute

source/orm/sql/internal/query_result_pk_resolver.cpp

@@ -3,15 +3,6 @@
 #include "matador/utils/value.hpp"
 
 namespace matador::sql::internal {
-void query_result_pk_resolver::on_primary_key(const char* id, std::string& /*value*/, const size_t size) {
-    if (!type_stack_.empty()) {
-        return;
-    }
-    std::string value;
-    utils::data_type_traits<std::string>::read_value(reader_, id, column_index_++, value, size);
-    pk_ = value;
-}
-
 void query_result_pk_resolver::on_attribute(const char *id, const utils::value &x, const utils::field_attributes &attr) {
     if (is_constraint_set(attr.options(), utils::constraints::PRIMARY_KEY)) {
         if (x.is_integer()) {