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Real VFP Tablerevert()
Message
From
12/02/2008 06:18:13
 
 
To
12/02/2008 02:32:52
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Environment versions
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP2
Network:
Windows 2003 Server
Database:
MySQL
Miscellaneous
Thread ID:
01291359
Message ID:
01291734
Views:
17
>Naomi,
>
>Since the cursors resulting from CursorAdapters are not part of a DBC, I guess we cannot do transactions on the VFP side. =(
>
First, not sure if that's true in VFP9. Bt I don't really know. MakeTransactable is sticking in my mind.

But my real purpose - to ask if you are interrogating and acting on the return by TableUpdate(). If not, you should.

good luck


>Thanks
>Dennis
>
>
>
>>>Naomi,
>>>
>>>In DataSession 1, I created a VFP Cursor from a Cursoradapter which gets its data from a MySQL table. I have set all there is to set to make it updatable. Its Buffermodeoverride is 5 - optimistic table buffering. I then made modifications to this cursor - edits, deletions and appends.
>>>
>>>In the MySQL client, I intentionally locked some records in the server side.
>>>
>>>Back to DataSession 1. I issue TABLEUPDATE(.T.), which obviously failed. So, I issued a TABLEREVERT(.T.). NOT ALL records were reverted back to its original state. Those that were 'successfully sent' to the server could not be reverted back.
>>>
>>>I have no problem with the server side as I have put SQL sends to commit and rollback in the AfterCursorUpdate event.
>>>
>>>What I want to happen is an "all or nothing" scenario - if any record update fails, then none gets updated - in the VFP side.
>>>
>>>The workaround I did was to just do a CursorRefresh() to fetch back the original records. Is this the ONLY way?
>>>
>>>Thanks!
>>>
>>>Dennis
>>>
>>>
>>I see the problem, but I'm not sure of the answer since I only played with CA and local data. Can you use transactions in your scenario?
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