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7.7

SQL Find or Filter slow. Use a pass through query?

Asked by AviationAce in VB Database Programming, SQL Server 2005, Databases Miscellaneous, Microsoft Visual Studio Express

Tags: VB database, VB, SQL, SQL Server

FYI: My programming platform is:
Microsoft Visual Studio 2008
Version 9.0.30729.1 SP
Microsoft .NET Framework
Version 3.5 SP1
Installed Edition: VB Express
Microsoft Visual Basic 2008 91908-152-0000043-60625
Microsoft Visual Basic 2008

I am using an SQL Server 2005 backend over a WAN connection. I need to simply run a select query on a recordset that is already open. The code posted below works but is really slow.

I'm not sure but I think that the database driver is downloading the whole table and then running the query locally. Is that true?

If so, how can I tell the SQL sever to execute the query and return ONLY the record(s) I want?

Thanks!

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             Public Function GetFieldValue(ByVal byBin As String, ByVal Field As String) As String
        Dim rs As ADODB.Recordset
' NOTE: mbr_rs is a member recordset that belongs to this class that has already been opened
        rs = mbr_rs
        rs.Filter = ""
 
        Try
            With rs
'NOTE: I've tried the Filter and Find methods.  Both are SLOW!!!
                '.Filter = "[bin]='" & byBin & "'"
                .MoveFirst()
                .Find("[bin]='" & byBin & "'")
                If Not .EOF Or Not .BOF Then
                    GetFieldValue = .Fields(Field).Value
                Else
                    GetFieldValue = ""
                End If
            End With
        Catch
            GetFieldValue = "err" & Err.Number & " - " & Err.Description
        End Try
        rs = Nothing
    End Function

           
         

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SQL Find or Filter slow. Use a pass through query?

Asked by AviationAce in VB Database Programming, SQL Server 2005, Databases Miscellaneous, Microsoft Visual Studio Express

Tags: VB database, VB, SQL, SQL Server

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