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VB6 - Optimize multiple SQL executes.

Posted on 2008-11-18
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Last Modified: 2012-05-05
Hi

I have the code below which i know isnt that pretty, it uses simple strings to send commands to my SQLConnection using the execute method.

However the code below can be quite slow, is there anyone with an idea to optimize this code ?
For Each cVare In getArticleContainer
        If (cVare.isSelected Or Not onlySelected) And (Not cVare.adlibitum Or afregnAdlibitum) Then
            If cVare.isBetaling Then
                sqlStr = "insert into salg_betal (salg_text,salg_value,salg_id) "
                sqlStr = sqlStr & " values('" & FQuo(cVare.vare_navn) & "'," & getSQLDecimalVal(cVare.vare_price) & "," & sellThis & ")"
                frmFront.registerCnxn.execute (sqlStr)
            Else
                frmFront.fValues = "nuværende vare: " & cVare.getCopyStr
                sqlStr = "insert into salg_linie (salg_vare,salg_antal,salg_id,salg_navn) values(" & cVare.vare_id & "," & getSQLDecimalVal(Round(cVare.vare_antal, 2)) & "," & sellThis & ",'" & FQuo(cVare.vare_navn) & "')"
                found = frmFront.registerCnxn.execute("SET NOCOUNT ON " & sqlStr & " select SCOPE_IDENTITY() as mID SET NOCOUNT OFF").Fields("mID").value
                '' Tjek om der er en besked på denne vare når den sælges.
                Call checkForMessage(cVare.vare_id)
                '' RABAT
                If cVare.rabat_procent > 0 Then
                    frmFront.registerCnxn.execute "insert into rabat_salg (salg_linieID,rabat_id,rabat_procent,person_id) values (" & found & "," & cVare.rabat_id & "," & getSQLDecimalVal(cVare.rabat_procent) & "," & pers_id & ")"
                End If
                Call checkAddArticle(frmFront.monthID, cVare.vare_id)
                If cVare.isSammensat Then
                    For Each nVare In cVare.getArticleCollection
                        Call checkAddArticle(frmFront.monthID, nVare.vare_id)
                        sqlStr = "insert into salg_sammensat (salg_linieID,salg_vare,salg_pris,salg_momsID,salg_momsnavn,salg_moms,vare_type) "
                        sqlStr = sqlStr & " select " & found & "," & nVare.vare_id & "," & getSQLDecimalVal(nVare.vare_price) & ",moms_id,moms_navn,moms_sats from moms_db inner join t_vare on moms_id=vare_moms where vare_id=" & nVare.vare_id
 
                        frmFront.fValues = frmFront.fValues & vbNewLine & sqlStr
                        frmFront.registerCnxn.execute (sqlStr)
                    Next
                Else
                    sqlStr = "insert into salg_sammensat (salg_linieID,salg_vare,salg_pris,salg_momsID,salg_momsnavn,salg_moms,vare_type) "
                    sqlStr = sqlStr & " select " & found & "," & cVare.vare_id & "," & getSQLDecimalVal(cVare.vare_price) & ",moms_id,moms_navn,moms_sats from moms_db inner join t_vare on vare_moms=moms_id where vare_id=" & cVare.vare_id
                    frmFront.fValues = frmFront.fValues & vbNewLine & sqlStr
                    frmFront.registerCnxn.execute (sqlStr)
                End If
            End If
        End If
    Next

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Question by:mSchmidt
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thiyaguk earned 2000 total points
ID: 22983422
1.You can completely Port this code to SQL Stored procedure.
2.try to Form multiple insert statements like
"insert into tablename values (blah,blah,blah);insert into tablename"

Construct this type of sql statement and try to run only once. Definitely this will solve the problem
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by:mSchmidt
ID: 22983506
How would you go about doing this a a Stored procedure.
I have n number of items in my ArticleContainer and each article may consist of multiple sub articles.
Sending this data as parameters seems impossible.
However it would ofcause be the best situation because it would limit data being sent to the server to the absolute minimum.


Additionally doing this as multiple insert statements joined would be possible for the inner loop however i use a value returned from a former execute and append this within

sqlStr = "insert into salg_linie (salg_vare,salg_antal,salg_id,salg_navn) values(" & cVare.vare_id & "," & getSQLDecimalVal(Round(cVare.vare_antal, 2)) & "," & sellThis & ",'" & FQuo(cVare.vare_navn) & "')"
found = frmFront.registerCnxn.execute("SET NOCOUNT ON " & sqlStr & " select SCOPE_IDENTITY() as mID SET NOCOUNT OFF").Fields("mID").value

I dont see how this would be possible ?
               
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