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06/23/2009 at 02:28AM PDT, ID: 24514007

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9.4

VBA Access: how to optimize this routine

Asked by andy7789 in Microsoft Access Database, VB Objects, VB Script

Hi X-perts,

The table has three fields: ID, Date and Returns. I need to loop through all distinct IDs (financial instruments) and do something with each instrument Returns.

The attached code takes too long as it opens a closes over 10,000 recordsets in a loop. How can I optimize it?

I am thinking to dump the whole table to a variant (very fast), but cannot figure out how to extract returns for separate instruments.

I can obviously loop through IDs (to check if they are the same), but, probably, it is not the best way.

Any suggestions for such an algorithm?

Thanks

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             Set Recordset = New ADODB.Recordset
SQL = "SELECT DISTINCT [FUND ID] from Returns"
Call Recordset.Open(SQL, conHFI, CursorTypeEnum.adOpenForwardOnly, LockTypeEnum.adLockreadOnly, CommandTypeEnum.adCmdText)
fundIDs = Recordset.GetRows
FundsNo = UBound(fundIDs, 2)
 
Recordset.Close
Set Recordset = Nothing
For i = 0 To FundsNo
 
    Set Recordset = New ADODB.Recordset
    SQL = "SELECT [Fund ID],[Date],[Return] FROM Returns WHERE Returns.[Date] >= #" & firstdate & "# AND [FUND ID] = " & fundIDs(0, i)
    Call Recordset.Open(SQL, conHFI, CursorTypeEnum.adOpenForwardOnly, LockTypeEnum.adLockreadOnly, CommandTypeEnum.adCmdText)
    temp = Recordset.GetRows
    Recordset.Close
    Set Recordset = Nothing
    'do something with temp
Next

           
         

20090824-EE-VQP-74 - Hierarchy / EE_QW_3_20080625

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1. capricorn113,064,646
2. DatabaseMX6,142,948
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24. jjafferr1,340,995
25. dannywar...1,329,637

VBA Access: how to optimize this routine

Asked by andy7789 in Microsoft Access Database, VB Objects, VB Script

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