SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function substring (children 1)
     ExpressionList (children 2)
      Literal \'1234\' (alias lhs)
      Literal UInt64_2 (alias rhs)
    Identifier lhs
    Identifier rhs
