SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 5)
          ExpressionList (children 2)
           Identifier WatchID
           Function arrayDistinct (alias arr) (children 1)
            ExpressionList (children 1)
             Function groupArray (children 1)
              ExpressionList (children 1)
               Function dictGetUInt64 (children 1)
                ExpressionList (children 3)
                 Literal \'db_dict.cache_hits\'
                 Literal \'UserID\'
                 Function toUInt64 (children 1)
                  ExpressionList (children 1)
                   Identifier WatchID
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier test.hits_1m
          Function equals (children 1)
           ExpressionList (children 2)
            Function modulo (children 1)
             ExpressionList (children 2)
              Identifier WatchID
              Literal UInt64_7
            Literal UInt64_0
          ExpressionList (children 1)
           Identifier WatchID
          ExpressionList (children 1)
           OrderByElement (children 1)
            Function length (children 1)
             ExpressionList (children 1)
              Identifier arr
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier arr
     Literal Array_[UInt64_0]