nstang01 opened a new pull request #3926:
URL: https://github.com/apache/carbondata/pull/3926
### Why is this PR needed?
Update operation will clean up delta files before update( see
cleanUpDeltaFiles(carbonTable, false)), It's loop traversal metadata path
and segment path many times. When there are too many files, the overhead
will increase and update time will be longer.
### What changes were proposed in this PR?
In cleanUpDeltaFiles have some same points in get files method, like
updateStatusManager.getUpdateDeltaFilesList(segment,
false,CarbonCommonConstants.UPDATE_DELTA_FILE_EXT, true,
allSegmentFiles,true) and
updateStatusManager.getUpdateDeltaFilesList(segment,
false,CarbonCommonConstants.UPDATE_INDEX_FILE_EXT, true,
allSegmentFiles,true), They are just different file types，but loop traversal
segment path twice. we can merge it.
### Does this PR introduce any user interface change?
- No
- Yes. (please explain the change and update document)
### Is any new testcase added?
- No
- Yes
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