SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Literal UInt64_2 (alias nelems)
    Function arrayResize (children 1)
     ExpressionList (children 2)
      Function arrayPartialSort (children 1)
       ExpressionList (children 2)
        Identifier nelems
        Literal Array_[NULL, UInt64_9, UInt64_4, UInt64_8, UInt64_10, UInt64_5, UInt64_2, UInt64_3, UInt64_7, UInt64_1, UInt64_6]
      Identifier nelems
