better table print, order by/offset/limit improvements

parser.h

@@ -34,6 +34,7 @@ namespace usql {
 	save_table,
 	drop_table,
 	column_name,
+	offset_limit,
 	column_order,
 	column_value,
 	function,
@@ -62,6 +63,16 @@ namespace usql {
 	ColOrderNode(int index, bool asc) : Node(NodeType::column_name), col_name(""), col_index(index), ascending(asc) {}
     };
 
+
+   
+   struct OffsetLimitNode : Node {
+	int	offset;
+	int	limit;
+
+	OffsetLimitNode(int off, int lim) : Node(NodeType::offset_limit), offset(off), limit(lim) {}
+   };
+
+
     struct SelectColNode : Node {
         std::unique_ptr<Node>	value;
         std::string name;
@@ -227,9 +238,10 @@ namespace usql {
 	std::unique_ptr<std::vector<SelectColNode>> cols_names;
 	std::unique_ptr<Node> where;
 	std::vector<ColOrderNode> order_by;
+	OffsetLimitNode	offset_limit;
 
-	SelectFromTableNode(std::string name, std::unique_ptr<std::vector<SelectColNode>> names, std::unique_ptr<Node> where_clause, std::vector<ColOrderNode> orderby) :
-	Node(NodeType::select_from), table_name(name), cols_names(std::move(names)), where(std::move(where_clause)), order_by(orderby) {}
+	SelectFromTableNode(std::string name, std::unique_ptr<std::vector<SelectColNode>> names, std::unique_ptr<Node> where_clause, std::vector<ColOrderNode> orderby, OffsetLimitNode offlim) :
+	Node(NodeType::select_from), table_name(name), cols_names(std::move(names)), where(std::move(where_clause)), order_by(orderby), offset_limit(offlim) {}
     };
 
     struct CreateTableAsSelectNode : Node {
@@ -303,7 +315,8 @@ namespace usql {
 	std::unique_ptr<Node> parse_update_table();
 
 	std::unique_ptr<Node> parse_where_clause();
-	std::vector<ColOrderNode>  parse_orderby_clause();
+	std::vector<ColOrderNode>  parse_order_by_clause();
+	OffsetLimitNode parse_offset_limit_clause();
 
 	std::unique_ptr<Node> parse_operand_node();
 	std::unique_ptr<Node> parse_value();