added column_expression and table_column_expression

source/orm/query/internal/column_value_pair.cpp

@@ -4,8 +4,8 @@
 
 namespace matador::query::internal {
 
-column_value_pair::column_value_pair(std::string name, utils::database_type value)
-: column_(std::move(name))
+column_value_pair::column_value_pair(const std::string& name, utils::database_type value)
+: column_(name)
 , value_(std::move(value)) {
 }
 
@@ -23,6 +23,11 @@ column_value_pair::column_value_pair( const char* name, utils::placeholder p )
 : column_(name)
 , value_(p) {}
 
+column_value_pair::column_value_pair(table_column col, column_expression_ptr expression)
+: column_(std::move(col))
+, expression_(std::move(expression)){
+}
+
 const table_column &column_value_pair::col() const {
   return column_;
 }

source/orm/query/internal/query_parts.cpp

@@ -350,9 +350,9 @@ void query_update_part::accept(query_part_visitor &visitor) {
   visitor.visit(*this);
 }
 
-query_set_part::query_set_part(const std::vector<column_value_pair> &key_value_pairs)
+query_set_part::query_set_part(std::vector<column_value_pair> &&key_value_pairs)
 : query_part(sql::dialect_token::Set)
-, key_value_pairs_(key_value_pairs) {
+, key_value_pairs_(std::move(key_value_pairs)) {
 }
 
 const std::vector<column_value_pair> &query_set_part::column_values() const {