SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 2)
    Identifier CounterID
    Function uniq (children 1)
     ExpressionList (children 1)
      Identifier UserID
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test.hits
   Function and (children 1)
    ExpressionList (children 2)
     Literal UInt64_0
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier CounterID
       Literal UInt64_1704509
   ExpressionList (children 1)
    Identifier CounterID
   Set