kbeedkar commented on PR #322:
URL: https://github.com/apache/incubator-wayang/pull/322#issuecomment-1545524456

   Hi guys, I don't think this is the right way to support different data 
sources. 
   
   As we discussed in an earlier email, a better way to go about this, which is 
also extensible and maintainable, is to first extend the WayangRel Algebra, 
with specific table scan operators (e.g., one for Jdbc, one for csv, etc..) and 
write logical-to-physical rules. Each physical scan operator should then have 
methods for accessing sources.
   


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