SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (alias y) (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier x
          Literal UInt64_1
      Literal Array_[UInt64_3, UInt64_5]
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (alias y) (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function concat (children 1)
         ExpressionList (children 2)
          Identifier x
          Literal \'hello\'
      Literal Array_[\'qq\', \'ww\']
