SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 3)
      Literal \'groupUniqArrayMergeIf\'
      Function array (children 1)
       ExpressionList (children 2)
        Function arrayReduce (children 1)
         ExpressionList (children 2)
          Literal \'groupUniqArrayState\'
          Literal Array_[\'---\', \'---\']
        Function arrayReduce (children 1)
         ExpressionList (children 2)
          Literal \'groupUniqArrayState\'
          Literal Array_[\'t1\', \'t\']
      Literal Array_[UInt64_1, UInt64_0]
