LogCleanupCommand delete a part of logs unexpectedly

Issue

When running LogCleanupCommand with OlderThan parameter, it deletes some of logs unexpectedly.

e.g.

• When sub process have been completed but parent process is not yet, relevant logs of sub process will be deleted

• if NodeInstanceLog.log_date/VariableInstanceLog.log_date is older than OlderThan date

  and

  if ProcessInstanceLog.end_date is later than OlderThan date

• RequestInfo, ErrorInfo, ExecutionErrorInfo are deleted regardless of existence of corresponding ProcessInstanceLog.

Is this a bug?
We expect that :

When olderThan is specified, at first identify the target completed/aborted ProcessInstanceId whose ProcessInstanceLog.end_date is older than the specified date, and then delete corresponding ProcessInstanceLog, NodeInstanceLog, VariableInstanceLog, RequestInfo, ErrorInfo and ExecutionErrorInfo.

How can we achieve what we want?