Question

speed up code...

Asked by: luca2009

I have this code to call a query directly on a Access mdb.
But when the code goto: Set RST = CMD.Execute the operation to get rset is very,very slow!!!!!

this is the query stored in access mdb:

SELECT DISTINCT L0928.PROVA03, L0928.PROVA05, Count(L0928.PROVA05) AS SOMMA5
FROM L0928
GROUP BY L0928.PROVA03, L0928.PROVA05;

note: the  number of rs are 115.457

- is a simle query in access mdb... i dont know the stored procedure in ado
- no fileds indexed
- excution of Set RST = CMD.Execute is arround one minute, i think...

Sub QUERY_ACCESS_1()
 
    On Error GoTo errore
 
    Dim TEST As Long, var_SPORT As String, VAR_COD As String
    Dim varDataRows As Variant, I As Long, TOTALE_CODICI As Long
    Dim CNSQL As ADODB.Connection
    Dim RST As ADODB.Recordset
 
    Set RST = New ADODB.Recordset
    Set CNSQL = New ADODB.Connection
    Set CMD = New ADODB.Command
 
    If Not CNSQL.State = adStateClosed Then
        CNSQL.Close
    End If
 
    CNSQL.CursorLocation = adUseServer
    CNSQL.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
               "Data Source=\\xxx.xxxx.xxxx.xxxxx\yyyy\PUBBLICA\VARIE\L0928.mdb;"
 
    CMD.ActiveConnection = CNSQL
    CMD.CommandText = "L0928_Query"
    CMD.CommandType = adCmdStoredProc
 
    'NOTA: IL NOME DELLA QUERY DEVE ESSERE DIFFERENTE A NOME TABELLA E ALTRI CAMPI NEL DB
    Set RST = CMD.Execute
 
    varDataRows = RST.GetRows
    TEST = UBound(varDataRows, 2) + 1
 
    RST.Close
    Set RST = Nothing
    CNSQL.Close
    Set CNSQL = Nothing
 
    For I = 0 To TEST - 1
        var_SPORT = varDataRows(0, I)
        VAR_COD = varDataRows(1, I)
        TOTALE_CODICI = varDataRows(2, I)
    Next I
 
    Exit Sub
 
errore:
    MsgBox "Errore Numero: " & CStr(Err.Number) & vbCrLf & _
           "Descrizione: " & Err.Description & vbCrLf & _
           "Sorgente dell'Errore: " & Err.Source
 
    Err.Clear
    
End Sub
                                  
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Asked On
2009-09-02 at 11:04:37ID24702226
Topic

Visual Basic Programming

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: luca2009Posted on 2009-09-02 at 11:09:08ID: 25243830

image of my query

 

by: ladarlingPosted on 2009-09-02 at 18:18:01ID: 25247178

Are all 115,457 records necessary? How far away is the datasource:

"Data Source=\\xxx.xxxx.xxxx.xxxxx\yyyy\PUBBLICA\VARIE\L0928.mdb;"


 

by: luca2009Posted on 2009-09-06 at 04:06:15ID: 25269436

yes !
In other case i filter the rset in sql string, or not?

20120131-EE-VQP-002

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