SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function groupArrayLastArray (children 2)
     ExpressionList (children 1)
      Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_4, UInt64_5, UInt64_6]
     ExpressionList (children 1)
      Literal UInt64_3