Github user xuchuanyin commented on the issue:
https://github.com/apache/carbondata/pull/2169
@ravipesala Thanks for helping me understand the design purpose.
The origin problem is that I found the query result will duplicate/miss
some records. The scenario is that I use a datamap to filter out 2 block (each
contains 3 blocklets). When it comes to BlockletDataMap, it filter out 6
blocklets, but the blocklets are duplicated twice. Actually it only contains
blocklets from the first block.
I'll work on the relativeBlockletId and fix the problem.
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