SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 2)
    Identifier RegionID
    Function uniq (alias u) (children 1)
     ExpressionList (children 1)
      Identifier UserID
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test.hits
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier CounterID
     Literal UInt64_800784
   ExpressionList (children 1)
    Identifier RegionID
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier u
    OrderByElement (children 1)
     Identifier RegionID
   Literal UInt64_10