SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function uniqUpTo (children 2)
     ExpressionList (children 1)
      Identifier x
     ExpressionList (children 1)
      Literal UInt64_2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function arrayJoin (alias x) (children 1)
            ExpressionList (children 1)
             Function array (children 1)
              ExpressionList (children 4)
               Literal Array_[UInt64_1, UInt64_2]
               Literal Array_[UInt64_1, UInt64_2]
               Literal Array_[UInt64_1, UInt64_2, UInt64_3]
               Function array (children 1)
                ExpressionList