VBA/ADODB Run-Time Error: 3704

问题

The following VBA subroutine will run most queries just fine. (ie: SELECT * FROM DUAL)

Sub DisplayQuery(QueryString As String)
  Dim rs As New ADODB.Recordset
  Dim connStr As String
  connStr = _
   "Provider=MSDAORA.1;" _
   & "User ID=abc;Password=123;" _
   & "Data Source=xxx/xxx;"
  out QueryString

  rs.Open QueryString, connStr, adOpenStatic, adLockOptimistic
  Range("DataTable").Clear
  Cells(1, 1).CopyFromRecordset rs
End Sub

However, when I run the query below, the following error message immediately pops up: Run-time error '3704':Operation is not allowed when the object is closed.

with all_hours as
  ( select to_date('2009-11-03 05:00 PM','yyyy-mm-dd hh:mi PM') + numtodsinterval(level-1,'hour') hour
      from dual
   connect by level <= 4 /*hours*/

  )
  select h.hour
       , count(case when h.hour = trunc(s.sampled_on,'hh24') then 1 end) sampled
       , count(case when h.hour = trunc(s.received_on,'hh24') then 1 end) received
       , count(case when h.hour = trunc(s.completed_on,'hh24') then 1 end) completed
       , count(case when h.hour = trunc(s.authorized_on,'hh24') then 1 end) authorized
    from all_hours h cross join sample s
   group by h.hour

Why?

回答1:

If I recall correctly, the ADO Command object has a default timeout (30 seconds, I think) which may be causing your problem: there should be a setting like

cn.ConnectionTimeout = (your value here)

which you could extend.

回答2:

I just restructured my query (link), so that I could put it into a view. I then created a connection in Excel to view name.

来源：https://stackoverflow.com/questions/1682717/vba-adodb-run-time-error-3704

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Oracle

excel

vba

adodb

oracle9i