SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function countIf (children 1)
     ExpressionList (children 2)
      Identifier name
      Function greater (children 1)
       ExpressionList (children 2)
        Identifier uid
        Literal UInt64_2000
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier users
