SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 2)
      Literal \'uniqExactMerge\'
      Function array (children 1)
       ExpressionList (children 1)
        Function arrayReduce (children 1)
         ExpressionList (children 2)
          Literal \'uniqExactMergeState\'
          Function array (children 1)
           ExpressionList (children 2)
            Function arrayReduce (children 1)
             ExpressionList (children 2)
              Literal \'uniqExactState\'
              Literal Array_[UInt64_12345678901]
            Function arrayReduce (children 1)
             ExpressionList (children 2)
              Literal \'uniqExactState\'
              Literal Array_[UInt64_12345678902]
