SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayPartialSort (children 1)
     ExpressionList (children 3)
      Literal UInt64_2
      Literal Array_[UInt64_1, UInt64_2, UInt64_3]
      Literal Array_[UInt64_1]
