Advice required - interfacing with Worldpay

Just after a bit of advice as I'm not sure when the best time to save a transaction to the database would be.
The way I see it, from my ecommerce site I can persist the order to the database at two alternative points...
1. Before payment is received (and set a status as draft), then once the payment callback is received set the status to 'processing'
2. After the Worlpay payment has been made and the callback containing all additional shopping cart parameters received.
Anyone prefer one over the other? if so why?
The only downside I can see of the first method is that additional houskeeping would be required to remove any transactions with a status of 'draft' that have not received a payment after a day or two.
Regards.

Anyone any preference?

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Skill sets required for interfacing with third party

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Hi, I am a novice user of SQL Server and would like some advice on how to solve a problem I have. (I hope I have chosen the correct forum to post this question)
I have created a SQL Server 2012 database that comprises approx 10 base tables, with a further 40+ views that either summarise the base table data in various ways, or build upon other views to create more complex data sets (upto 4 levels of view).
I then use EXCEL to create a dashboard that has multiple pivot table data connections to the various views.
The users can then use standard excel features - slicers etc to interrogate the various metrics.
The underlying database holds a single days worth of information, but I would like to extend this to cover multiple days worth of data, with the excel spreadsheet having a cell that defines the date for which information is to
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As an example of 3 of the views,
Table A has a row per system event (30,000+ per day), each event having an identity, a TYPE eg Arrival or Departure, with a time of event, and a planned time for the event (a specified identity will have a sequence of Arrival and Departure events)
View A compares seperate rows to determine how long between the Arrival and Departure events for an identity
View B compares seperate rows to determine how long between planned Arrival and Departure events for an identity
View C uses View A and view B to provide the variance between actual and planned
Excel dashboard has graphs showing information retrieved from Views A, B and C. The dashboard is only likely to need to query a single days worth of information.
Thanks for your time.

You are posting in the database design forum but it seems to me that you have 2 separate but highly dependent issues - neither of which is really database design related at this point. Rather you have an user interface issue and an database programmability
issue. Those I cannot really address since much of that discussion requires knowledge of your users, how they interface with the database, what they use the data for, etc. In addition, it seems that Excel is the primary interface for your users
- so it may be that you should post your question to an excel forum.
However, I do have some comments. First, views based on views is generally a bad approach. Absent the intention of indexing (i.e., materializing) the views, the db engine does nothing different for a view than it does for any ad-hoc query.
Unfortunately, the additional layering of logic can impede the effectiveness of the optimizer. The more complex your views become and the deeper the layering, the greater the chance that you befuddle the optimizer.
I would rather not have the server resolve the views for the complete data set
I don't understand the above statement but it scares me. IMO, you DO want the server to do as much work as possible since it is closest to the data and has (or should have) the resources to access and manipulate the data and generate the desired
results. You DON'T want to move all the raw data involved in a query over the network and into the client machine's storage (memory or disk) and then attempt to compute the desired values.
I considered parameterisation of views, but I dont believe views support parameters, I also considered stored procedures, but I dont believe that stored procedures allow result sets to be used as pseudo tables.
Correct on the first point, though there is such a thing as a TVF which is similar in effect. Before you go down that path, let's address the second statement. I don't understand that last bit about "used as pseudo tables" but that sounds more
like an Excel issue (or maybe an assumption). You can execute a stored procedure and use/access the resultset of this procedure in Excel, so I'm not certain what your concern is. User simplicity perhaps? Maybe just a terminology issue? Stored
procedures are something I would highly encourage for a number of reasons. Since you refer to pivoting specifically, I'll point out that sql server natively supports that function (though perhaps not in the same way/degree Excel does). It
is rather complex tsql - and this is one reason to advocate for stored procedures. Separate the structure of the raw data from the user.
(I dont really want the time taken for the dashboard refresh to increase - it currently takes approx 45 seconds following SQL Server Engine Tuning Advisor recommendations)
DTA has its limitations. What it doesn't do is evaluate the "model" - which is where you might have more significant issues. Tuning your queries and indexing your tables will only go so far to compensate for a poorly designed schema (not that
yours is - just a generalization). I did want to point out that your refresh process involves many factors - the time to generate a resultset in the server (including plan compilation, loading the data from disk, etc.), transmitting that data over the
network, receiving and storing the resultset in the client application, manipulating the resultset into the desired form/format), and then updating the display. Given that, you need to know how much time is spent in each part of that process - no sense
wasting time optimizing the smallest time consumer.
So now to your sample table - Table A. First, I'll give you my opinion of a flawed approach. Your table records separate facts about an entity as multiple rows. Such an approach is generally a schema issue for a number of reasons.
It requires that you outer join in some fashion to get all the information about one thing into a single row - that is why you have a view to compare rows and generate a time interval between arrival and departure. I'll take this a step further and assume
that your schema/code likely has an assumption built into it - specifically that a "thing" will have no more than 2 rows and that there will only be one row with type "arrival" and one row with type "departure". Violate that assumption and things begin to
fall apart.  If you have control over this schema, then I suggest you consider changing it. Store all the facts about a single entity in a single row.  Given the frequency that I see this pattern, I'll guess that you
cannot. So let's move on.
30 thousand rows is tiny, so your current volume is negligible. You still need to optimize your tables based on usage, so you need to address that first. How is the data populated currently? Is it done once as a batch?  Is it
done throughout the day - and in what fashion (inserts vs updates vs deletes)? You only store one day of data - so how do you accomplish that specifically?  Do you purge all data overnight and re-populate? What indexes
have you defined? Do all tables have a clustered index or are some (most?) of them heaps?   OTOH, I'm going to guess that the database is at most a minimal issue now and that most of your concerns are better addressed at the user interface
and how it accesses your database. Perhaps now is a good time to step back and reconsider your approach to providing information to the users. Perhaps there is a better solution - but that requires an understanding of your users, the skillset of
everyone involved, what you have to work with, etc. Maybe just some advanced excel training? I can't really say and it might be a better question for a different forum.
One last comment - "identity" has a special meaning in sql server (and most database engines I'm guessing). So when you refer to identity, do you refer to an identity column or the logical identity (i.e., natural key) for the "thing" that Table A is
attempting to model?

Conceptual advice required for file receiver scenario

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My scenario is to read 3 sets of data from SAP ERP and write files on the receiver system, one per data set.
I could create 3 service interfaces and set up Integration Builder configuration for each one but this seems messy.
Alternatively, if I create one service interface with 3 operations to group them, it is not possible to create the required files unless I add mapping and use dynamic configuration to determine the filename from the payload and set this in the receiver communication channel.
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It is only possible to bind a service interface to one communication channel in the receiver agreement.
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Alan
Edited by: Alan Cecchini on Aug 4, 2011 7:02 PM
Edited by: Alan Cecchini on Aug 4, 2011 7:02 PM

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reward me ifusefull

SAP Certification for *ABAP System Interfaces with SAP NetWeaver    7.0*

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<removed by moderator>
Points Assured.
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Edited by: Jan Stallkamp on Oct 13, 2008 3:30 PM

Don't ask for copyrighted material!
Don't publish your e-mail address!
Don't assure points!
=> this thread will be locked.
Please read the rules of engagement otherwise you will set your account on risk of being deleted.
Best regards,
Jan Stallkamp

SAP Certification for   ABAP System Interfaces with SAP NetWeaver

Hi Experts,
I am appearing for SAP Certification in the stream of *ABAP
System Interfaces with SAP NetWeaver    7.0*
so as per the syllabus i required the following material,
BC420,BC425, BC427,BC415,BC417,BIT300,BIT350
BC401,BC402,BC400, BC430,BC490,ADM325,BC425,NET900,
NW001,TESA20,TZCAFG,SM001
so if any body is having the softcopy or any related links of the
above mentioned material
please send to my following mail ID's.
<removed by moderator> at yahoo dot co in
Points Assured.
Regards
Praneeth
<THREAD LOCKED. Please read the [Rules of Engagement|https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement] to discover why>
Edited by: Mike Pokraka on Oct 14, 2008 1:25 PM

Don't ask for copyrighted material!
Don't publish your e-mail address!
Don't assure points!
=> this thread will be locked.
Please read the rules of engagement otherwise you will set your account on risk of being deleted.
Best regards,
Jan Stallkamp

Can java interface with windows to do things

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Derek

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1) install printer driversNo
2) run a uninstall programNo
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4) change registry keysNo
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Advice required - interfacing with Worldpay

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