leventov commented on issue #7233: Set "is_published" to false for overshadowed 
segments in sys.segments table
URL: 
https://github.com/apache/incubator-druid/issues/7233#issuecomment-477787296
 
 
   Perhaps `is_actual` is better than `is_active`.
   
   Regarding the semantics of `is_overshadowed`, you all are right, confusing 
it with the temporal state of being loaded on some servers is probably a wrong 
idea.
   
   Maybe we need both:
    - `is_actual` for published and not overshadowed by *loaded* segments, in 
other words, "segments that can and should be queried now".
    - `is_overshadowed` to provide ability to introspect into `is_published && 
!is_overshadowed` and `is_published && !is_overshadowed && !is_available` views.

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