GitHub user xuchuanyin opened a pull request: https://github.com/apache/carbondata/pull/2169
[CARBONDATA-2344][DataMap] Fix bugs in mapping blocklet to UnsafeDMStore rows In BlockletDataMap, carbondata stores DMRow in an array for each blocklet. But currently carbondata accesses the DMRow only by blockletId(0, 1, etc.), which will cause problem since different block can have same blockletId. This PR adds a map to map the blockId#blockletId to array index, carbondata can access the DMRow by blockId and blockletId. Be sure to do all of the following checklist to help us incorporate your contribution quickly and easily: - [x] Any interfaces changed? `NO, only internal interfaces have been changed` - [x] Any backward compatibility impacted? `NO` - [x] Document update required? `NO` - [x] Testing done Please provide details on - Whether new unit test cases have been added or why no new tests are required? `NO` - How it is tested? Please attach test report. `Tested in local` - Is it a performance related change? Please attach the performance test report. `No` - Any additional information to help reviewers in testing this change. `NO` - [x] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA. `Not related` You can merge this pull request into a Git repository by running: $ git pull https://github.com/xuchuanyin/carbondata 0413_bug_blocklet_dm_unsafe_row Alternatively you can review and apply these changes as the patch at: https://github.com/apache/carbondata/pull/2169.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #2169 ---- commit dd010297c7f7428dc8f42ec1a292b8cdddcc09aa Author: xuchuanyin <xuchuanyin@...> Date: 2018-04-13T08:18:23Z Fix bugs in mapping blocklet to UnsafeDMStore In BlockletDataMap, carbondata stores DMRow in an array for each blocklet. But currently carbondata accesses the DMRow only by blockletId(0, 1, etc.), which will cause problem since different block can have same blockletId. This PR adds a map to map the blockId#blockletId to array index, carbondata can access the DMRow by blockId and blockletId. ---- ---