SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function uniq (children 1)
     ExpressionList (children 1)
      Identifier UserID
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier Sign
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test.visits
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier CounterID
     Literal UInt64_512441