SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function in (alias x) (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Literal UInt64_0
    Function count (children 1)
     ExpressionList
   ExpressionList (children 1)
    Identifier x