SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function arrayReduce (children 1)
       ExpressionList (children 2)
        Literal \'groupUniqArray\'
        Function array (children 1)
         ExpressionList (children 5)
          Literal Array_[UInt64_1, UInt64_2]
          Literal Array_[UInt64_1]
          Function emptyArrayUInt8 (children 1)
           ExpressionList
          Literal Array_[UInt64_1]
          Literal Array_[UInt64_1, UInt64_2]
