Even,
thank you for your response. I had missed feat.SetFID, mentioned in the PG
ticket, so will have a go with that.
For the record, I'm currently working against the OCI driver but wish to be
reasonably independent of the underlying database implementation - hence use of OGR.
Thanks and best wishes,
Peter
Even Rouault wrote:
Hi Peter,
Do you mean that just after issuing a CreateFeature(), the feature ID isn't set
to the correct value (the one that you'll find after dataset reopening) ?
You have to be more specific about which OGR driver you are talking about
because the mechanisms for setting/retrieving FID is driver specific.
Perhaps a small snippet of code would help to understand what you do / would
like to do.
If you're interested in the PG driver, here's a relevant ticket :
http://trac.osgeo.org/gdal/ticket/3744
Best regards,
Even
Dear Team,
I've reviewed the change log for release 8 so far and do not think that
this question is version specific.
I'm coding to support an incremental process for loading a large spatial
database from a set of distribution objects. I have noted that my present
approach results in the OGR_FID column values restarting at 1 for each
append.
This is clearly an error! However, there does not appear to be a method for
initialising the 'nextfidtowrite' value in the API. What is the best
strategy
to adopt?
So far as I can see, there appear to be two options. One is to read
every
feature until there are no more to read: I'd rather not do that. The other
would involve opening the layer, reading the featurecount and then requesting
the featurecount'th feature - featurecount'th + 1 should give an error. Both
methods should leave the current feature being the last existing feature, but
is
this sufficient to effectively initialise the value at which the next FID
will
start?
Thanks and best wishes,
Peter
--------------------------------------------------------------------------------
Peter J Halls, GIS Advisor, University of York
Telephone: 01904 323806 Fax: 01904 323740
Snail mail: IT Services, University of York, Heslington, York YO10 5DD
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Peter J Halls, GIS Advisor, University of York
Telephone: 01904 323806 Fax: 01904 323740
Snail mail: IT Services, University of York, Heslington, York YO10 5DD
This message has the status of a private and personal communication
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