SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function CAST (alias x) (children 1)
     ExpressionList (children 2)
      Literal Array_[\'hello\']
      Literal \'Array(Enum8(\\\'hello\\\' = 1))\'
    Function tuple (alias y) (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'hello\'
        Literal \'Enum8(\\\'hello\\\' = 1)\'
 Identifier PrettyCompactNoEscapes
