cannot pass WHERE clause to VRT datasource

[bartvde@…]

This is necessary for searching through Mapserver WFS on OGR VRT layers.

In the case of a VRT driver, I think the where clause is interpreted by OGR SQL
instead of being passed on to the underlying driver. Perhaps I need to look into
this as well. 

VRT drivers do not have a way of passing on SQL WHERE clauses (attribute filters).

[warmerdam]

Bart, 

I have committed changes that seem to work as far as passing the SQL 
attribute filter down to the underlying driver.  I think this will resolve
your problem when backed by an RDBMS based OGR driver. 

Let me know if the problem persists.

[bartvde@…]

Frank, as already mentioned by e-mail this works perfectly now. Thanks. Setting
status to fixed.