jerrypeng edited a comment on issue #2605: implement topic routing on a per 
record basis
URL: https://github.com/apache/incubator-pulsar/pull/2605#issuecomment-422892352
 
 
   @rdhabalia a usecase we have is will a source for ingesting data from 
databases.  Users will often want to just specify schema or db and have the 
data of all the tables underneath automatically be sent to corresponding topics 
in Pulsar.  Thus, at the end of the day we will have table -> topic mapping.  
For a use case as such, when its too cumbersome to explicitly specify some sort 
of mapping to topics and also for use cases  when you don't know which topic to 
sent until runtime or upon message inspection

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