[Qgis-developer] about ogr provider

[Marco Hugentobler]

Hi Godofredo,

The ogr provider is mostly used for reading shapefiles and GML. Afaik those 
datasources have only one layer per file (which fits perfectly with the 
approach in qgis). 
Is it possible that oracle, mysql, postgresql in ogr have multiple layers per 
datasource? If yes, then we should think about how to handle that in QGIS. 
I'm in favour that the plugin asks the ogrprovider how many layers are 
present and the plugin then creates one Vectorlayer for each ogr layer.

Regards,
Marco

On Monday 23 July 2007 19:17:59 godofredo contreras wrote:
> what kind of files are loaded using the ogr provider?, I´m adapting the
> Stephan Holl oracle ogr plugin to current version of qgis and adding some
> functionality to be able to load mysql, postgresql and oraclelayers using
> the ogr provider. Inspecting the code I found that the ogr provider always
> takes the first layer of dataset, is this correct? making a change in
> qgsogrprovider constructor what functionality could be affected?Best
> regardsGodofredo Contreras
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-- 
Dr. Marco Hugentobler
Institute of Cartography
ETH Zurich
Technical Advisor QGIS Project Steering Committee
marco.hugentobler at karto.baug.ethz.ch