[mapguide-trac] #1298: When Create Join and Caculation at one time, The data preview of this new class will have a exception

[MapGuide Open Source]

#1298: When Create Join and Caculation at one time, The data preview of this new
class will have a exception
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 Reporter:  hubu     |         Owner:  hubu           
     Type:  defect   |        Status:  new            
 Priority:  medium   |     Milestone:                 
Component:  General  |       Version:  2.2.0          
 Severity:  major    |    Resolution:                 
 Keywords:           |   External_id:  1301480,1311858
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Comment (by tomfukushima):

 Note that I actually reviewed the original patch and asked Buddy to see if
 a change could be made higher up (instead of in the server).  He quickly
 came back with an alternate solution that I was happy with.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1298#comment:1>
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