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Slow response using ADOX Catalog over thin client.

Posted on 2004-08-10
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Last Modified: 2013-11-27
Hi since migrating my application from dao to ADO I am experiencing slow repsonses accessing the catalog object. In DAO I used query definations.

The reason I am using the catalog is to access quieries in an access 2000 database. There are probably about 100 queries most of which have parameters.

The main delay seems to be with the opening of the catalog. I know I could change this so that the catalog is opened at the begining of the application but what would happen if some one crashed out.

Also one of the other problems I am having is that I have to put a delay into the program otherwise no data is returned.

    Dim conn As ADODB.Connection
    ConnectToDB conn
    Set cat = New ADOX.Catalog
    'set the catalog the current connection
    cat.ActiveConnection = conn
    'set the command to the query name
    Set cmd = cat.Procedures("dp_Appoints_Qry").Command   'Killer SQL that has UNION...

    'give the parameters
    cmd.Parameters("AP CODE") = (Entity.code)
    Wait 0.2
    Set ApptRS = New ADODB.Recordset
    ApptRS.Open cmd

Thanks MrPan
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Question by:MrPan
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LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 11761119
Why do you pass over the ADOX ?
ADODB Command has a Parameters.Refresh function

Dim conn As ADODB.Connection
    ConnectToDB conn
    'set the command to the query name
    Set cmd = new ADODB.Command
    cmd.command = "dp_Appoints_Qry"
    cmd.parameters.refresh
    'give the parameters
    cmd.Parameters("AP CODE") = (Entity.code)
    Wait 0.2
    Set ApptRS = New ADODB.Recordset
    ApptRS.Open cmd

Please report if this works for your...

CHeers
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Author Comment

by:MrPan
ID: 11761420
Angel

Thanks for the quick reply.

cmd.command is not acceptable. I have tried changing this to commandtext but the parameters do not get loaded.

Any suggestions

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LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 11761518
Sorry for the typo.

Also, I forgot to connect the command with the connection object...

Dim conn As ADODB.Connection
    ConnectToDB conn
    'set the command to the query name
    Set cmd = new ADODB.Command
    cmd.commandtext = "dp_Appoints_Qry"
    set cmd.activeconnection = conn
    cmd.parameters.refresh
    'give the parameters
    cmd.Parameters("AP CODE") = (Entity.code)
    Wait 0.2
    Set ApptRS = New ADODB.Recordset
    ApptRS.Open cmd

Cheers
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LVL 2

Author Comment

by:MrPan
ID: 11761519
OK

I have now got it working by adding

cmd.activeconenction = conn

and

cmd.commandtext = "Select * From dp_Appoints_Qry"

I will have to change the code in a few places to see if it is any quicker. I will let you know what I find out.
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LVL 2

Author Comment

by:MrPan
ID: 11761525
Found it at the same time. Great minds.....
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LVL 2

Author Comment

by:MrPan
ID: 11771366
Many Thanks

Mr Pan
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