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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2021/01/11 07:51:38 UTC

[GitHub] [iotdb] wshao08 commented on pull request #2457: Fix delete bug in delete range judge

wshao08 commented on pull request #2457:
URL: https://github.com/apache/iotdb/pull/2457#issuecomment-757683258


   Hi. To make sure the two range has intersection, only T3 <= T2 or T4 >= T1 is not enough. 
   e.g. 
   [T1,T2] : [100,200]
   [T3,T4] : [50, 80]
   T3 <= T2 but the two ranges have no intersection.
   
   It is easy to know that if T2<T3 or T4<T1, the two ranges cannot have intersection. Then go with the reverse logic the result should be !(T2<T3 or T4<T1) => (T2 >= T3 && T4>=T1)
   Please check.


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