EVValueAccess.forAdd parameter question

[Ivan Smahin]

On Oct 29, 2014, at 10:35, François Van Lerberghe <frvanlerberghe at gmail.com> wrote:

> Hello,
> 
> What's the exact scope of the EVValueAccess.forAdd parameter used with
> VCursor.SetBlank ?
> 
> The wiki say "Valentina will not save copies of previous field values."
> 
> Is this statement valid for the whole life of VCursor or only for the next
> command (Vcursor.AddRecord for example).
> 
> In other words, may I
> - create a Vcursor with several fields
> - use setBlank with this EVValueAccess.forAdd  parameter
> - Add some records
> - Go to some records (Vcursor.Position = n)
> - and finally, update *one* field of one or several records of this Vcursor
> ?

I sent prev. letter too quickly...
SetBlank() always prepare "empty/default" record buffer.
But in case of "forUpdate" we do some extra steps internally to be able to "rollback" record's values in case of errors during updateRecord.


-- 
Best regards,
Ivan Smahin
Senior Software Engineer
Paradigma Software, Inc
Valentina - The Ultra-Fast Database
http://www.valentina-db.com