Apache-iotdb

Bug Fixes
* IOTDB-1303 Disable group by without aggregation function in select clause
* IOTDB-1306 Fix insertion blocked caused the deadlock in memory control module
* IOTDB-1308 Fix users with READ_TIMESERIES permission cannot execute group by fill queries
* IOTDB-1344 Fix cannot create timeseries caused by the timeseries count doesn't reset when deleting storage group
* IOTDB-1384 Some value will disappear while using group by query
* IOTDB-1398 Do not select unseq files when there are uncompacted old unseq files
* ISSUE-3316 Fix query result with the same time range is inconsistent in group by query
* Fix TotalSeriesNumber in MManager counted twice when recovering
* Fix unseq compaction throws a wrong exception if some paths are not in the file
* Fix overlapped data should be consumed first exception when query

Improvements
* [IOTDB-1356] Separate unseq_file_num_in_each_level from selecting candidate file in unseq compaction
* [IOTDB-1412] Unclear exception message thrown when executing empty InsertTabletPlan
* continuous compaction in level compaction strategy when no tsfile is to be closed

New Features
* support brackets with number in timeseries path

Bug Fixes
* ISSUE-2505 ignore PathNotExistException in recover and change recover error to warn
* IOTDB-1119 Fix C++ SessionDataSet bug when reading value buffer
* Fix SessionPool does not recycle session and can not offer new Session due to RunTimeException
* ISSUE-2588 Fix dead lock between deleting data and querying in parallel
* ISSUE-2546 Fix first chunkmetadata should be consumed first
* IOTDB-1126 Fix unseq tsfile is deleted due to compaction
* IOTDB-1137 MNode.getLeafCount error when existing sub-device
* ISSUE-2624 ISSUE-2625 Avoid OOM if user don't close Statement and Session manually
* ISSUE-2639 Fix possible NPE during end query process
* Alter IT for An error is reported and the system is suspended occasionally
* IOTDB-1149 print error for -e param when set maxPRC<=0
* IOTDB-1247 Fix the insert blocked caused the bugs in mem control module
* ISSUE-2648 Last query not right when having multiple devices
* Delete mods files after compaction
* ISSUE-2687 fix insert NaN bug
* ISSUE-2598 Throw explicit exception when time series is unknown in where clause
* Fix timeseriesMetadata cache is not cleared after the TsFile is deleted by a compaction
* ISSUE-2611 An unsequence file that covers too many sequence file causes OOM query
* IOTDB-1135 Fix count timeseries bug when the paths are nested
* ISSUE-2709 IOTDB-1178 Fix cache is not cleared after compaction
* ISSUE-2746 Fix data overlapped bug after the elimination unseq compaction process
* Fix getObject method in JDBC should return an Object
* IOTDB-1188 Fix IoTDB 0.11 unable to delete data bug
* Fix when covering a tsfile resource with HistoricalVersion = null, it’ll throw a NPE
* fix the elimination unseq compaction may loss data bug after a delete operation is executed
* Fix a bug of checking time partition in DeviceTimeIndex
* Throw exeception when device to be queried is not in tsFileMetaData
* Fix unseq compaction file selector conflicts with time partition bug
* Fix high CPU usage during the compaction process

Improvements
* IOTDB-1140 optimize regular data encoding
* Add more log for better tracing
* Add backgroup exec for cli -e function
* Add max direct memory size parameter to env.sh
* Change last cache log to debug level

New Features
* Add explain sql support

Bugfix list:

* IOTDB-1049 Fix Nullpointer exception and a delete bug in Last query
* IOTDB-1060 Support full deletion for delete statement without where clause
* IOTDB-1068 Fix Time series metadata cache bug
* IOTDB-1069 restrict the flushing memtable number to avoid OOM when mem_control is disabled
* IOTDB-1077 add insertOneDeviceRecords API in java session
* IOTDB-1087 fix compaction block flush: flush do not return until compaction finished
* IOTDB-1106 Delete timeseries statement will incorrectly delete other timeseries
* Github issue-2137 fix grafana value-time position bug
* Github issue-2169 GetObject returns String for all data types
* Github issue-2240 fix Sync failed: Socket is closed by peer
* Github issue-2387 The deleteData method exists in Session but not in SessionPool.
* add thrift_max_frame_size in iotdb-engine.properties
* Fix incorrect last result after deleting all data
* Fix compaction recover block restart: IoTDB cannot restart until last compaction recover task finished
* Fix compaction ignore modification file: delete does not work after compaction
* print more insert error message in client
* expose enablePartition parameter into iotdb-engines.properpties

Bug Fixes
* IOTDB-990 cli parameter maxPRC shouldn't to be set zero
* IOTDB-993 Fix tlog bug
* IOTDB-994 Fix can not get last_value while doing the aggregation query along with first_value
* IOTDB-1000 Fix read redundant data while select with value filter with unseq data
* IOTDB-1007 Fix session pool concurrency and leakage issue when pool.close is called
* IOTDB-1016 overlapped data should be consumed first
* IOTDB-1021 Fix NullPointerException when showing child paths of non-existent path
* IOTDB-1028 add MAX_POINT_NUMBER format check
* IOTDB-1034 Fix Show timeseries error in Chinese on Windows
* IOTDB-1035 Fix bug in getDeviceTimeseriesMetadata when querying non-exist device
* IOTDB-1038 Fix flink set storage group bug
* ISSUE-2179 fix insert partial tablet with binary NullPointer bug
* add reject status code
* Update compaction level list delete
* Fix query result is not correct
* Fix import errors in Session.py and SessionExample.py
* Fix modules can not be found when using pypi to pack client-py
* Fix Count timeseries group by level bug
* Fix desc batchdata count bug

* [IOTDB-797] InsertTablet deserialization from WAL error
* [IOTDB-788] Can not upgrade all storage groups
* [IOTDB-792] deadlock when insert while show latest timeseries
* [IOTDB-794] Rename file or delete file Error in start check in Windows
* [IOTDB-795] BufferUnderflowException in Hive-connector
* [IOTDB-766] Do not release unclosed file reader, a small memory leak
* [IOTDB-796] Concurrent Query throughput is low
* Query result is not correct when some unsequence data exists
* Change the default fetch size to 10000 in session
* [IOTDB-798] fix a set rowLimit and rowOffset bug
* [IOTDB-800] Add a new config type for those parameters which could not be modified any more after the first start
* [IOTDB-802] Improve "group by" query performance
* [IOTDB-799] remove log visualizer tool from v0.10
* fix license-binary
* [IOTDB-805] Fix BufferUnderflowException when querying TsFile stored in HDFS
* python session client ver-0.10.0
* [IOTDB-808] fix bug in selfCheck() truncate
* fix doc of MeasurementSchema in Tablet
* [IOTDB-811] fix upgrading mlog many times when upgrading system.properties crashed
* Improve IoTDB restart process
* remove jol-core dependency which is introduced by hive-serde 2.8.4
* remove org.json dependency because of license compatibility
* [ISSUE-1551] fix set historical version when loading additional tsfile

If you are using v0.8, please upgrade to 0.9.3 first and then upgrade to 0.10.0 after the data is upgraded.

Disclaimer:
Apache IoTDB is an effort undergoing incubation at The Apache Software Foundation (ASF). Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.