SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function path (alias x) (children 1)
     ExpressionList (children 1)
      Literal \'clickhouse.com/a/b/c\'
   ExpressionList (children 1)
    Identifier x (alias path)