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