[Mapguide-trac] [mapguide-trac] #2213: Support configurable GwsQueryEngine fallback

[MapGuide Open Source]

#2213: Support configurable GwsQueryEngine fallback
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   Reporter:  jng              |       Owner:     
       Type:  enhancement      |      Status:  new
   Priority:  medium           |   Milestone:  2.5
  Component:  Feature Service  |     Version:     
   Severity:  major            |    Keywords:     
External_id:                   |  
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 We implemented data-store level join optimizations as part of RFC123 for
 feature joins between classes from within the same data store.

 However, there may be some existing cases where the new behavior has does
 not fully cover. While such cases should be identified and addressed as
 soon as possible, we should give users the ability to fallback to the old
 GwsQueryEngine behaviour if so desired.

 We'll add a new serverconfig.ini flag (UseFdoJoinOptimization) to control
 this behavior.

 And actually, due to fixing #1888 falling back to GwsQueryEngine will only
 be slightly slower in most cases where the datastore-level  join
 optimization is currently being used.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/2213>
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