[QGIS-trac] [Quantum GIS] #3385: GML: add a choice to insert a sql filter

[Quantum GIS]

#3385: GML: add a choice to insert a sql filter
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   Reporter:  aperi2007         |              Owner:  nobody       
       Type:  enhancement       |             Status:  new          
   Priority:  minor: annoyance  |          Milestone:  Version 1.7.0
  Component:  Data Provider     |            Version:  Trunk        
   Keywords:                    |   Platform_version:  7            
   Platform:  Windows           |           Must_fix:  No           
Status_info:  0                 |  
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 The GML format is multi-layer.
 So to select a single layer (for example called roads) , gdal, has the
 option to insert a sql-string:

 .. -sql "select * from roads"

 This choice permit to extract from GML only the istances referred to class
 "roads".

 In QGIS when try to add a vector layer from a GML would be better to have
 the choice to insert a sql string to apply to gdal.
 Otherwise qgis is capable to use only a gml file having one only layer in
 it.

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/3385>
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