SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (alias lambda) (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function toString (children 1)
         ExpressionList (children 1)
          Identifier x
      Literal Array_[UInt64_1, UInt64_2, UInt64_3]
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Identifier lambda
      Literal Array_[\'1\', \'2\', \'3\']