nstang01

Results 2 issues of nstang01

### 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...

**I want to get the Cognito identity id use object c. This id is used as the user's UUID. But It is always the same when I switch users.pls give...

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