SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier a
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 3)
           Function groupArray (alias a) (children 1)
            ExpressionList (children 1)
             Function intDiv (children 1)
              ExpressionList (children 2)
               Identifier number
               Literal UInt64_54321
           Function arrayUniq (alias u) (children 1)
            ExpressionList (children 1)
             Identifier a
           Function arrayEnumerateDense (alias arr) (children 1)
            ExpressionList (children 1)
             Identifier a
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 1)
                  Identifier number
                 TablesInSelectQuery (children 1)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier system.numbers
                 Literal UInt64_1000000
          ExpressionList (children 1)
           Function modulo (children 1)
            ExpressionList (children 2)
             Function intHash32 (children 1)
              ExpressionList (children 1)
               Identifier number
             Literal UInt64_100000
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier u
     Function arrayElement (children 1)
      ExpressionList (children 2)
       Function arrayReverseSort (children 1)
        ExpressionList (children 1)
         Identifier arr
       Literal UInt64_1