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Number of records in an ADO resultset (VBA)

Posted on 2006-11-15
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Can anyone help me determine a number of records in an ADO resultset? I know it is easy to do in VB, but for some reason in VBA I can't get it (using VBA for excel if that makes a difference). Thanks in advance.
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Question by:MorDeRor
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9 Comments
 
LVL 66

Expert Comment

by:Jim Horn
ID: 17948126
Normally it would be rs.RecordCount.  

Depending on your cursor type it may show -1 initially, which means you either have to use a new cursor type, or rs.MoveLast then rs.MoveFirst.

afaik there is no difference in how an ADO recordset behaves based on whether you are using VB or VBA.
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LVL 3

Author Comment

by:MorDeRor
ID: 17948244
right, it does show the value of -1, and it does not like movelast command either (I'm guessing it has to do with a specific type of cursor). In any case, it would be very clumsy to have to do

rs.movelast
msgbox rs.recordcount
rs.movefirst

isn't there a better way to get this info?
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Author Comment

by:MorDeRor
ID: 17948329
OK, I think, the problem is solved. see this article for explanation:

http://www.itjungle.com/mgo/mgo121703-story01.html

The way I understood it, the idea is to request client side processing for the cursor, this way all the information about it is available right away, and rs.recordcount returns a valid value.
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LVL 66

Expert Comment

by:Jim Horn
ID: 17948352
If the performance hit for client-side processing is minimal, as the method you discovered gives you the rs.RecordCount right away, then go for it.
0
 
LVL 3

Author Comment

by:MorDeRor
ID: 17948369
yes, I am not so concerned about the performance hit on the client side, and I would like to right as little code as possible to get the number of records.
0
 

Expert Comment

by:DavidNL
ID: 17958370
I would do it like this:

Dim intRowCount as integer
rs.open "Select count (SomeTable.SomeColumnName) as MyCount from SomeTable")
intRowCount = rs!MyCount
rs.close

msgbox "Rowcount = " & intRowCount

Regards,
David.
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LVL 3

Author Comment

by:MorDeRor
ID: 17958414
thanks. :) but would mean an extra trip to the server just to get the row count. Even though client side processing has it's limitations, I think it is still better than having to make a special call to the server. Especially if you consider that on an active system the resultset may have a different number of rows from what your query returns...
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Accepted Solution

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Stimphy earned 2000 total points
ID: 18059025
I would assume that you can set the open method and the lock type...

try doing

adoRec.open (SQL),connection,adOpenKeyset adLockPessimistic

msgBox(adoRec.RecordCount)

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LVL 3

Author Comment

by:MorDeRor
ID: 18061529
that was so much easier. Thank you!
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