Zesong Sun created IOTDB-295:
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Summary: Refactor db.exception
Key: IOTDB-295
URL: https://issues.apache.org/jira/browse/IOTDB-295
Project: Apache IoTDB
Issue Type: Improvement
Reporter: Zesong Sun
Fix For: 0.9.0-SNAPSHOT
Refactor db.exception:
* Extract uniform message into exception classes
* Create base exception "ProcessException", which is extended by all exceptions
* Add different error codes to all exceptions. When an exception is caught and
a higher-level exception is thrown, the error code will keep and pass (so that
users will know the detailed error reason)
* Refactor packages under db.exception
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