EQL - parsing order by clause

src/test/resources/EQL.g4

@@ -1,7 +1,7 @@
 grammar EQL;
 
 select_statement
-   : select_clause? fetch_clause* where_clause? limit_clause?
+   : select_clause? fetch_clause* where_clause? orderby_clause? limit_clause?
    ;
 
 select_clause
@@ -20,6 +20,24 @@ where_clause
    : 'where' conditional_expression
    ;
 
+orderby_clause
+   : 'order' 'by' orderby_property (',' orderby_property)*
+   ;
+
+orderby_property
+   : PATH_VARIABLE asc_desc? nulls_firstlast?
+   ;
+
+nulls_firstlast
+   : 'nulls' 'first'
+   | 'nulls' 'last'
+   ;
+
+asc_desc
+   : 'asc'
+   | 'desc'
+   ;
+
 limit_clause
    : 'limit' NUMBER_LITERAL offset_clause?
    ;