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Apache IoTDB 0.12.0

New Features

  • [IOTDB-68] New shared-nothing cluster
  • [IOTDB-507] Add zeppelin-interpreter module
  • [IOTDB-825] Aggregation by natural month
  • [IOTDB-890] support SDT lossy compression
  • [IOTDB-944] Support UDTF (User-defined Timeseries Generating Function)
  • [IOTDB-965] Add timeout parameter for query
  • [IOTDB-1077] Add insertOneDeviceRecords API in java session
  • [IOTDB-1055] Support data compression type GZIP
  • [IOTDB-1024] Support multiple aggregated measurements for group by level statement
  • [IOTDB-1276] Add explain sql support and remove debug_state parameter
  • [IOTDB-1197] Add iotdb-client-go as a git submodule of IoTDB repo
  • [IOTDB-1230] Support spans multi time partitions when loading one TsFile
  • [IOTDB-1273] Feature/restrucutre python module as well as supporting pandas dataframe
  • [IOTDB-1277] support IoTDB as Flink's data source
  • [PR-2605] Add level merge to "merge" command

Incompatible changes

  • [IOTDB-1081] New TsFile Format
  • [ISSUE-2730] Add the number of unseq merge times in TsFile name.

Miscellaneous changes

  • [IOTDB-868] Change mlog from txt to bin
  • [IOTDB-1069] Restrict the flushing memtable number to avoid OOM when mem_control is disabled
  • [IOTDB-1104] Refactor the error handling process of query exceptions
  • [IOTDB-1108] Add error log to print file name while error happened
  • [IOTDB-1152] Optimize regular data size in traversing
  • [IOTDB-1180] Reset the system log file names and maximal disk-space size
  • [ISSUE-2515] Set fetchsize through JDBC and Session
  • [ISSUE-2598] Throw explicit exception when time series is unknown in where clause
  • [PR-2944] Throw exception when device to be queried is not in TsFileMetaData
  • [PR-2967] Log memory usage information in SystemInfo for better diagnosis

Bug Fixes

  • [IOTDB-1049] Fix NullpointerException and a delete bug in Last query
  • [IOTDB-1050] Fix Count timeserise column name is wrong
  • [IOTDB-1068] Fix Time series metadata cache bug
  • [IOTDB-1084] Fix temporary memory of flushing may cause OOM
  • [IOTDB-1106] Fix delete timeseries bug
  • [IOTDB-1126] Fix the unseq tsfile delete due to merge
  • [IOTDB-1135] Fix the count timeseries prefix path bug
  • [IOTDB-1137] Fix MNode.getLeafCount error when existing sub-device
  • [ISSUE-2484] Fix creating timeseries error by using "create" or "insert" statement
  • [ISSUE-2545, 2549] Fix unseq merge end time bug
  • [ISSUE-2611] An unsequence file that covers too many sequence file causes OOM query
  • [ISSUE-2688] LRULinkedHashMap does not work as an LRU Cache
  • [ISSUE-2709, 1178] Fix cache not cleared after unseq compaction bug, Fix windows 70,10 ci bug in unseq compaction ci
  • [ISSUE-2741] getObject method in JDBC should return an Object
  • [ISSUE-2746] Fix data overlapped bug after unseq compaction
  • [ISSUE-2758] NullPointerException in QueryTimeManager.checkQueryAlive()
  • [ISSUE-2905] Fix Files.deleteIfExists() doesn't work for HDFS file
  • [ISSUE-2919] Fix C++ client memory leak bug
  • [PR-2613] Fix importCSVTool import directory bug & encode bug
  • [PR-2409] Fix import csv which can't import time format str
  • [PR-2582] Fix sync bug for tsfiles's directory changed by vitural storage group
  • [ISSUE-2911] Fix The write stream is not closed when executing the command 'tracing off'

Apache IoTDB 0.11.3

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

Apache IoTDB 0.11.2

Bug Fixes

  • 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

Apache IoTDB 0.11.1

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

Apache IoTDB 0.11.0

New Features

  • IOTDB-627 Support range deletion for timeseries
  • IOTDB-670 Add raw data query interface in Session
  • IOTDB-716 add lz4 compression
  • IOTDB-736 Add query performance tracing
  • IOTDB-776 New memory control strategy
  • IOTDB-813 Show storage group under given path prefix
  • IOTDB-848 Support order by time asc/desc
  • IOTDB-863 add a switch to drop ouf-of-order data
  • IOTDB-873 Add count devices DDL
  • IOTDB-876 Add count storage group DDL
  • IOTDB-926 Support reconnection of Session
  • IOTDB-941 Support 'delete storage group '
  • IOTDB-968 Support time predicate in select last, e.g., select last * from root where time >= T
  • Show alias if it is used in query
  • Add level compaction strategy
  • Add partialInsert

Incompatible changes

  • IOTDB-778 Support double/single quotation in Path
  • IOTDB-870 change tags and attributes output to two columns with json values

Miscellaneous changes

  • IOTDB-784 Update rpc protocol to V3
  • IOTDB-790 change base_dir to system_dir
  • IOTDB-829 Accelerate delete multiple timeseries
  • IOTDB-839 Make Tablet api more friendly
  • IOTDB-902 Optimize max_time aggregation
  • IOTDB-916 Add a config entry to make Last cache configurable
  • IOTDB-928 Make ENCODING optional in create time series sentence
  • IOTDB-938 Re-implement Gorilla encoding algorithm
  • IOTDB-942 Optimization of query with long time unsequence page
  • IOTDB-943 Fix cpu usage too high
  • Add query load log
  • Add merge rate limiting

Bug Fixes

  • IOTDB-749 Avoid select * from root OOM
  • IOTDB-774 Fix "show timeseries" OOM problem
  • IOTDB-832 Fix sessionPool logic when reconnection failed
  • IOTDB-833 Fix JMX cannot connect IoTDB in docker
  • IOTDB-835 Delete timeseries and change data type then write failed
  • IOTDB-836 Statistics classes mismatched when endFile （delete timeseries then recreate）
  • IOTDB-837 ArrayIndexOutOfBoundsException if the measurementId size is not consistent with the value size
  • IOTDB-847 Fix bug that 'List user privileges' cannot apply to 'root'
  • IOTDB-850 a user could list others privilege bug
  • IOTDB-851 Enhance failure tolerance when recover WAL (enable partial insertion)
  • IOTDB-855 Can not release Session in SessionPool if RuntimeException occurs
  • IOTDB-868 Can not redo mlogs with special characters like comma
  • IOTDB-872 Enable setting timezone at client
  • IOTDB-877 fix prefix bug on show storage group and show devices
  • IOTDB-904 fix update last cache NullPointerException
  • IOTDB-920 Disable insert row that only contains time/timestamp column
  • IOTDB-921 When execute two query simultaneously in one statement, got error
  • IOTDB-922 Int and Long can convert to each other in ResultSet
  • IOTDB-947 Fix error when counting node with wildcard
  • IOTDB-949 Align by device doesn't support 'T*' in path.
  • IOTDB-956 Filter will be missed in group by time align by device
  • IOTDB-963 Redo deleteStorageGroupPlan failed when recovering
  • IOTDB-967 Fix xxx does not have the child node xxx Bug in count timeseries
  • IOTDB-970 Restrict log file number and size
  • IOTDB-971 More precise error messages of slimit and soffset
  • IOTDB-975 when series does not exist in TsFile, reading wrong ChunkMetadataList

Apache IoTDB (incubating) 0.10.1

  • [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

Apache IoTDB (incubating) 0.10.0

New Features

  • IOTDB-217 A new GROUPBY syntax, e.g., select avg(s1) from root.sg.d1.s1 GROUP BY ([1, 50), 5ms)
  • IOTDB-220 Add hot-load configuration function
  • IOTDB-275 allow using user defined JAVA_HOME and allow blank space in the JAVA_HOME
  • IOTDB-287 Allow domain in JDBC URL
  • IOTDB-292 Add load external tsfile feature
  • IOTDB-297 Support "show flush task info"
  • IOTDB-298 Support new Last point query. e.g, select last * from root
  • IOTDB-305 Add value filter function while executing align by device
  • IOTDB-309 add Dockerfiles for 0.8.1, 0.9.0, and 0.9.1
  • IOTDB-313 Add RandomOnDiskUsableSpaceStrategy
  • IOTDB-323 Support insertRecords in session
  • IOTDB-337 Add timestamp precision properties for grafana
  • IOTDB-343 Add test method in session
  • IOTDB-396 Support new query clause: disable align, e.g., select * from root disable align
  • IOTDB-447 Support querying non-existing measurement and constant measurement
  • IOTDB-448 Add IN operation, e.g., where time in (1,2,3)
  • IOTDB-456 Support GroupByFill Query, e.g., select last_value(s1) from root.sg.d1 GROUP BY ([1, 10), 2ms) FILL(int32[previousUntilLast])
  • IOTDB-467 The CLI displays query results in a batch manner
  • IOTDB-497 Support Apache Flink Connector with IoTDB
  • IOTDB-558 add text support for grafana
  • IOTDB-560 Support Apache Flink connecter with TsFile
  • IOTDB-565 MQTT Protocol Support, disabled by default, open in iotdb-engine.properties
  • IOTDB-574 Specify configuration when start iotdb
  • IOTDB-588 Add tags and attributes management
  • IOTDB-607 add batch create timeseries in native interface
  • IOTDB-612 add limit&offset to show timeseries
  • IOTDB-615 Use TsDataType + Binary to replace String in insert plan
  • IOTDB-617 Support alter one time series's tag/attribute
  • IOTDB-630 Add a jdbc-like way to fetch data in session
  • IOTDB-640 Enable system admin sql (flush/merge) in JDBC or Other API
  • IOTDB-671 Add clear cache command
  • Support open and close time range in group by, e.g, [), (]
  • Online upgrade from 0.9.x
  • Support special characters in path: -/+&%$#@
  • IOTDB-446 Support path start with a digit, e.g., root.sg.12a
  • enable rpc compression in session pool
  • Make JDBC OSGi usable and added a feature file
  • add printing one resource file tool
  • Allow count timeseries group by level=x using default path
  • IOTDB-700 Add OpenID Connect based JWT Access as alternative to Username / Password
  • IOTDB-701 Set heap size by percentage of system total memory when starts
  • IOTDB-708 add config for inferring data type from string value
  • IOTDB-715 Support previous time range in previousuntillast
  • IOTDB-719 add avg_series_point_number_threshold in config
  • IOTDB-731 Continue write inside InsertPlan
  • IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.
  • IOTDB-744 Support upsert alias

Incompatible changes

  • IOTDB-138 Move All metadata query to usual query
  • IOTDB-322 upgrade to thrift 0.12.0-0.13.0
  • IOTDB-325 Refactor Statistics in TsFile
  • IOTDB-419 Refactor the 'last' and 'first' aggregators to 'last_value' and 'first_value'
  • IOTDB-506 upgrade the rpc protocol to v2 to reject clients or servers that version < 0.10
  • IOTDB-587 TsFile is upgraded to version 2
  • IOTDB-593 add metaOffset in TsFileMetadata
  • IOTDB-597 Rename methods in Session: insertBatch to insertTablet, insertInBatch to insertRecords, insert to insertRecord
  • RPC is incompatible, you can not use client-v0.9 to connect with server-v0.10
  • TsFile format is incompatible, will be upgraded when starting 0.10
  • Refine exception code in native api

Miscellaneous changes

  • IOTDB-190 upgrade from antlr3 to antlr4
  • IOTDB-418 new query engine
  • IOTDB-429 return empty dataset instead of throw exception, e.g., show child paths root.*
  • IOTDB-445 Unify the keyword of "timestamp" and "time"
  • IOTDB-450 Add design documents
  • IOTDB-498 Support date format "2020-02-10"
  • IOTDB-503 Add checkTimeseriesExists in java native api
  • IOTDB-605 Add more levels of index in TsFileMetadata for handling too many series in one device
  • IOTDB-625 Change default level number: root is level 0
  • IOTDB-628 rename client to cli
  • IOTDB-621 Add Check isNull in Field for querying using session
  • IOTDB-632 Performance improve for PreviousFill/LinearFill
  • IOTDB-695 Accelerate the count timeseries query
  • IOTDB-707 Optimize TsFileResource memory usage
  • IOTDB-730 continue write in MQTT when some events are failed
  • IOTDB-729 shutdown uncessary threadpool
  • IOTDB-733 Enable setting for mqtt max length
  • IOTDB-732 Upgrade fastjson version to 1.2.70
  • Allow "count timeseries" without a prefix path
  • Add max backup log file number
  • add rpc compression api in client and session module
  • Continue writing the last unclosed file
  • Move the vulnera-checks section into the apache-release profile to accelerate compile
  • Add metaquery in python example
  • Set inferType of MQTT InsertPlan to true

Bug Fixes

  • IOTDB-125 Potential Concurrency bug while deleting and inserting happen together

  • IOTDB-185 fix start-client failed on WinOS if there is blank space in the file path; let start-server.bat suport jdk12,13 etc

  • IOTDB-304 Fix bug of incomplete HDFS URI

  • IOTDB-341 Fix data type bug in grafana

  • IOTDB-346 Fix a bug of renaming tsfile in loading function

  • IOTDB-370 fix a concurrent problem in parsing sql

  • IOTDB-376 fix metric to show executeQuery

  • IOTDB-392 fix export CSV

  • IOTDB-393 Fix unclear error message for no privilege users

  • IOTDB-401 Correct the calculation of a chunk if there is no data in the chunk, do not flush empty chunk

  • IOTDB-412 Paths are not correctly deduplicated

  • IOTDB-420 Avoid encoding task dying silently

  • IOTDB-425 fix can't change the root password.

  • IOTDB-459 Fix calmem tool bug

  • IOTDB-470fix IllegalArgumentException when there exists 0 byte TsFile

  • IOTDB-529 Relative times and NOW() operator cannot be used in Group By

  • IOTDB-531 fix issue when grafana visualize boolean data

  • IOTDB-546 Fix show child paths statement doesn't show quotation marks

  • IOTDB-643 Concurrent queries cause BufferUnderflowException when storage in HDFS

  • IOTDB-663 Fix query cache OOM while executing query

  • IOTDB-664 Win -e option

  • IOTDB-669 fix getting two columns bug while ”show devices“ in session

  • IOTDB-692 merge behaves incorrectly

  • IOTDB-712 Meet BufferUnderflowException and can not recover

  • IOTDB-718 Fix wrong time precision of NOW()

  • IOTDB-735 Fix Concurrent error for MNode when creating time series automatically

  • IOTDB-738 Fix measurements has blank

  • fix concurrent auto create schema conflict bug

  • fix meet incompatible file error in restart

  • Fix bugs of set core-site.xml and hdfs-site.xml paths in HDFS storage

  • fix execute flush command while inserting bug

  • Fix sync schema pos bug

  • Fix batch execution bug, the following sqls will all fail after one error sql

  • Fix recover endTime set bug

Apache IoTDB (incubating) 0.9.3

Bug Fixes

  • IOTDB-531 Fix that JDBC URL does not support domain issue
  • IOTDB-563 Fix pentaho cannot be downloaded because of spring.io address
  • IOTDB-608 Skip error Mlog
  • IOTDB-634 Fix merge caused errors for TsFile storage in HDFS
  • IOTDB-636 Fix Grafana connector does not use correct time unit

Miscellaneous changes

  • IOTDB-528 Modify grafana group by
  • IOTDB-635 Add workaround when doing Aggregation over boolean Series
  • Remove docs of Load External Tsfile
  • Add Grafana IoTDB Bridge Artifact to distribution in tools/grafana folder

Apache IoTDB (incubating) 0.9.2

Bug Fixes

  • IOTDB-553 Fix Return Empty ResultSet when queried series doesn't exist
  • IOTDB-575 add default jmx user and password; fix issues that jmx can't be accessed remotely
  • IOTDB-584 Fix InitializerError when recovering files on HDFS
  • Fix batch insert once an illegal sql occurs all the sqls after that will not succeed
  • Fix concurrent modification exception when iterator TsFileResourceList
  • Fix some HDFS config issues
  • Fix runtime exception not be catched and sync schema pos was nullpointer bug in DataTransferManager
  • Fix python rpc grammar mistakes
  • Fix upgrade ConcurrentModificationException

Miscellaneous changes

  • IOTDB-332 support Chinese characters in path
  • IOTDB-316 add AVG function to 4-SQL Reference.md and modify style
  • improve start-server.bat by using quotes to protect against empty entries
  • Add Chinese documents for chapter 4.2
  • change download-maven-plugin to 1.3.0
  • add session pool
  • add insertInBatch in Session
  • add insertInBatch to SessionPool
  • modify 0.9 docs to fit website
  • remove tsfile-format.properties
  • add bloom filter in iotdb-engien.properties
  • update server download doc
  • typos fix in Rel/0.9 docs
  • support 0.12.0 and 0.13.0 thrift

Apache IoTDB (incubating) 0.9.1

Bug Fixes

  • IOTDB-159 Fix NullPointerException in SeqTsFileRecoverTest and UnseqTsFileRecoverTest
  • IOTDB-317 Fix a bug that "flush + wrong aggregation query" causes the following queries to fail
  • IOTDB-324 Fix inaccurate statistics when writing in batch
  • IOTDB-327 Fix a groupBy-without-value-filter query bug caused by the wrong page skipping logic
  • IOTDB-331 Fix a groupBy query bug when axisOrigin-startTimeOfWindow is an integral multiple of interval
  • IOTDB-357 Fix NullPointerException in ActiveTimeSeriesCounter
  • IOTDB-359 Fix a wrong-data-type bug in TsFileSketchTool
  • IOTDB-360 Fix bug of a deadlock in CompressionRatio
  • IOTDB-363 Fix link errors in Development-Contributing.md and add Development-Document.md
  • IOTDB-392 Fix a bug in CSV export tool
  • Fix apache rat header format error in some files

Miscellaneous changes

  • IOTDB-321 Add definitions of time expression and LEVEL in related documents
  • Support pypi distribution for Python client

Apache IoTDB (incubating) 0.9.0

New Features

  • IOTDB-143 Compaction of data file
  • IOTDB-151 Support number format in timeseries path
  • IOTDB-158 Add metrics web service
  • IOTDB-173 Add batch write interface in session
  • IoTDB-174 Add interfaces for querying device or timeseries number
  • IOTDB-187 Enable to choose storage in local file system or HDFS
  • IOTDB-188 Delete storage group
  • IOTDB-193 Create schema automatically when inserting
  • IOTDB-198 Add sync module (Sync TsFiles between IoTDB instances)
  • IOTDB-199 Add a log visualization tool
  • IOTDB-203 Add "group by device" function for narrow table display
  • IOTDB-205 Support storage-group-level Time To Live (TTL)
  • IOTDB-208 Add Bloom filter in TsFile
  • IOTDB-223 Add a TsFile sketch tool
  • IoTDB-226 Hive-TsFile connector
  • IOTDB-239 Add interface for showing devices
  • IOTDB-241 Add query and non query interface in session
  • IOTDB-249 Enable lowercase in create_timeseries sql
  • IOTDB-253 Support time expression
  • IOTDB-259 Level query of path
  • IOTDB-282 Add "show version"
  • IOTDB-294 Online upgrade from 0.8.0 to 0.9.0
  • Spark-iotdb-connector
  • Support quoted measurement name
  • Generate cpp, go, and python thrift files under service-rpc
  • Display cache hit rate through jconsole
  • Support inserting data that time < 0
  • Add interface (Delete timeseries) in session
  • Add a tool to print tsfileResources (each device's start and end time)
  • Support watermark feature
  • Add micro and nano timestamp precision

Incompatible changes

  • RPC is incompatible, you can not use client-0.8.0 to connect with server-0.9.0 or use client-0.9.0 to connect with server-0.8.0.
  • Server is backward compatible, server-0.9.0 could run on data folder of 0.8.0. The data file will be upgraded background.
  • Change map key in TsDigest from String to enum data type

Miscellaneous changes

  • IOTDB-144 Meta data cache for query
  • IOTDB-153 Further limit fetchSize to speed up LIMIT&OFFSET query
  • IOTDB-160 External sort
  • IOTDB-161 Add ErrorCode of different response errors
  • IOTDB-180 Get rid of JSON format in "show timeseries"
  • IOTDB-192 Improvement for LRUCache
  • IOTDB-210 One else if branch will never be reached in the method optimize of ExpressionOptimizer
  • IOTDB-215 Update TsFile sketch tool and TsFile docs for v0.9.0
  • IOTDB-221 Add a python client example
  • IOTDB-233 keep metadata plan clear
  • IOTDB-251 Improve TSQueryDataSet structure in RPC
  • IOTDB-257 Makes the client stop fetch when dataSize equals maxPrintRowCount and change client fetchSize less than maxPrintRowCount
  • IOTDB-258 Add documents for Query History Visualization Tool and Shared Storage Architecture
  • IOTDB-265 Re-adjust the threshold size of memtable
  • IOTDB-267 Reduce IO operations in deserializing chunk header
  • IOTDB-273 Parallel recovery
  • IOTDB-276 Fix inconsistent ways of judging whether a Field is null
  • IOTDB-285 Duplicate fields in EngineDataSetWithoutValueFilter.java
  • IOTDB-287 Restrict users to only use domain names and IP addresses.
  • IOTDB-293 Variable naming convention
  • IOTDB-295 Refactor db.exception
  • Reconstruct Antlr3 grammar to improve performance
  • Tooling for release
  • Modified Decoder and SequenceReader to support old version of TsFile
  • Remove jdk constrain of jdk8 and 11
  • Modify print function in AbstractClient
  • Avoid second execution of parseSQLToPhysicalPlan in executeStatement

Known Issues

  • IOTDB-20 Need to support UPDATE

Bug Fixes

  • IOTDB-168&169 Fix a bug in export-csv tool and fix compatibility of timestamp formats in exportCsv, client display and sql
  • IOTDB-174 Fix querying timeseries interface cannot make a query by the specified path prefix
  • IOTDB-195 Using String.getBytes(utf-9).length to replace string.length() in ChunkGroupMetadata for supporting Chinese
  • IOTDB-211 Use "%IOTDB_HOME%\lib*" to refers to all .jar files in the directory in start-server.bat
  • IOTDB-240 Fix unknown time series in where clause
  • IOTDB-244 Fix bug when querying with duplicated columns
  • IOTDB-252 Add/fix shell and bat for TsFileSketchTool/TsFileResourcePrinter
  • IOTDB-266 NullPoint exception when reading not existed devices using ReadOnlyTsFile
  • IOTDB-264 Restart failure due to WAL replay error
  • IOTDB-290 Bug about threadlocal field in TSServiceImpl.java
  • IOTDB-291 Statement close operation may cause the whole connection's resource to be released
  • IOTDB-296 Fix error when skip page data in sequence reader
  • IOTDB-301 Bug Fix: executing "count nodes root" in client gets "Msg:3"
  • Fix Dynamic Config when Creating Existing SG or Time-series
  • Fix start-walchecker scripts for letting user define the wal folder
  • Fix start script to set JAVA_HOME

Apache IoTDB (incubating) 0.8.2

This is a bug-fix version of 0.8.1

  • IOTDB-264 lack checking datatype before writing WAL
  • IOTDB-317 Fix "flush + wrong aggregation" causes failed query in v0.8.x
  • NOTICE and LICENSE file update

Apache IoTDB (incubating) 0.8.1

This is a bug-fix version of 0.8.0

  • IOTDB-172 Bug in updating startTime and endTime in TsFileResource
  • IOTDB-195 Bug about 'serializedSize' in ChunkGroupMetaData.java (for Chinese string)
  • IOTDB-202 fix tsfile example data type
  • IOTDB-242 fix mvn integration-test failed because the files in the target folder changes
  • Abnormal publishing of sequence and unsequence data folders in DirectoryManager
  • Fix a bug in TimeRange's intersects function

Apache IoTDB (incubating) 0.8.0

This is the first official release of Apache IoTDB after joining the Incubator.

New Features

  • IOTDB-1 Add Aggregation query
  • IOTDB-4 Asynchronously force sync WAL periodically
  • IOTDB-5 Support data deletion
  • IOTDB-11 Support start script for jdk 11 on Windows OS
  • IOTDB-18 Improve startup script compatible for jdk11
  • IOTDB-36 [TsFile] Enable recover data from a incomplete TsFile and continue to write
  • IOTDB-37 Add WAL check tool script
  • IOTDB-51 Update post-back module to synchronization module
  • IOTDB-59 Support GroupBy query
  • IOTDB-60 Support Fill function when query
  • IOTDB-73 Add REGULAR encoding method for data with fixed frequency
  • IOTDB-80 Support custom export file name
  • IOTDB-81 Update travis for supporting JDK11 on Windows
  • IOTDB-83 Add process bar for import script and show how many rows have been exported
  • IOTDB-91 Improve tsfile-spark-connector to support spark-2.4.3
  • IOTDB-93 IoTDB Calcite integration
  • IOTDB-109 Support appending data at the end of a completed TsFile
  • IOTDB-122 Add prepared statement in JDBC
  • IOTDB-123 Add documents in Chinese
  • IOTDB-130 Dynamic parameters adapter
  • IOTDB-134 Add default parameter for client starting script
  • Add read-only mode of IoTDB
  • New storage engine with asynchronously flush and close data file
  • Adding english documents
  • Supporting travis + window + jdk8
  • Add skipping all UTs: maven integration-test -DskipUTS=true
  • Enable users define the location of their thrift compiler
  • Add example module
  • Add a log appender: put info, warn, error log into one file and disable log_info by default
  • Recover when resource file does not exist while tsfile is complete

Incompatible changes

If you use the previous unofficial version 0.7.0. It is incompatible with 0.8.0.

Miscellaneous changes

  • IOTDB-21 Add ChunkGroup offset information in ChunkGroupMetaData
  • IOTDB-25 Add some introduction for JMX MBean Monitor in user guide
  • IOTDB-29 Multiple Exceptions when reading empty measurements from TsFileSequenceReader
  • IOTDB-39 Add auto repair functionality for RestorableTsFileIOWriter
  • IOTDB-45 Update the license in IoTDB
  • IOTDB-56 Faster getSortedTimeValuePairList() of Memtable
  • IOTDB-62 Change log level from error to debug in SQL parser
  • IoTDB-63 Use TsFileInput instead of FileChannel as the input parameter of some functions
  • IOTDB-76 Reformat MManager.getMetadataInString() in JSON format
  • IOTDB-78 Make unsequence file format more similar with TsFile
  • IOTDB-95 Keep stack trace when logging or throwing an exception
  • IOTDB-117 Add sync documents
  • Modify ASF header for each file and add related maven plugin
  • Add IoTDB env script test
  • Add sync function for jdbc server to close
  • Add cache directories for download jars and sonar plugin of maven in travis
  • Add partition start and end offset constraints when loading ChunkGroupMetaData
  • Check when creating Storage group
  • Try to release memory asap in ReadOnlyMemChunk
  • Add more physical plan serializer
  • Move all generated tsfiles for test into the target folder
  • Make TsFileWriter as AutoClosable
  • Print apache-rat violation result on console
  • Update multi dir avoid disk is full
  • Simplify Path construction
  • Separate documents into different chapter folders
  • Suppress mvn log in travis
  • Add mvn -B in travis

Known Issues

  • IOTDB-20 Need to support UPDATE
  • IOTDB-124 Lost timeseries info after restart IoTDB
  • IOTDB-125 [potential] a concurrency conflict may occur when a delete command and insertion command appears concurrently
  • IOTDB-126 IoTDB will not be closed immediately after run 'stop-server.sh' script
  • IOTDB-127 Chinese version documents problems

Bug Fixes

  • IOTDB-2 Maven Test failed before run mvn package -Dmaven.test.skip=true
  • IOTDB-7 OpenFileNumUtilTest failed
  • IOTDB-15 Fail to install IoTDB on Ubuntu 14.04
  • IOTDB-16 Invalid link on https://iotdb.apache.org/#/Documents/Quick Start
  • IOTDB-17 Need to update chapter Start of https://iotdb.apache.org/#/Documents/Quick Start
  • IOTDB-18 IoTDB startup script does not work on openjdk11
  • IOTDB-19 Fail to start start-server.sh script on Ubuntu 14.04/Ubuntu 16.04
  • IOTDB-22 BUG in TsFileSequenceReader when reading tsfile
  • IOTDB-24 DELETION error after restart a server
  • IOTDB-26 Return error when quit client
  • IOTDB-27 Delete error message
  • IOTDB-30 Flush timeseries cause select to returns "Msg:null"
  • IOTDB-31 Cannot set float number precision
  • IOTDB-34 Invalid message for show storage group
  • IOTDB-44 Error message in server log when select timeseries
  • IOTDB-49 Authorizer module outputs too many debug log info
  • IOTDB-50 DataSetWithoutTimeGenerator's initHeap behaves wrongly
  • IOTDB-52 Cli doesn't support aggregate
  • IOTDB-54 Predicates doesn't take effect
  • IOTDB-67 ValueDecoder reading new page bug
  • IOTDB-70 Disconnect from server when logging in fails
  • IOTDB-71 Improve readPositionInfo
  • IOTDB-74 THe damaged log will be skipped if it is the only log
  • IOTDB-79 Long term test failed because of the version control of deletion function
  • IOTDB-81 Fix Windows OS environment for Travis-CI
  • IOTDB-82 File not closed in PageHeaderTest and cause UT on Windows fails
  • IOTDB-84 Out-of-memory bug
  • IOTDB-94 IoTDB failed to start client since the required jars are not in the right folder
  • IOTDB-96 The JDBC interface throws an exception when executing the SQL statement "list user"
  • IOTDB-99 List privileges User on cannot be used properly
  • IOTDB-100 Return error message while executing sum aggregation query
  • IOTDB-103 Does not give a hint when encountering unsupported data types
  • IOTDB-104 MManager is incorrectly recovered when system reboots
  • IOTDB-108 Mistakes in documents
  • IOTDB-110 Cli inserts data normally even if there is no space left on the disk
  • IOTDB-118 When the disk space is full, the storage group is created successfully
  • IOTDB-121 A bug of query on value columns
  • IOTDB-128 Probably a bug in iotdb official website
  • IOTDB-129 A bug in restoring incomplete tsfile when system restart
  • IOTDB-131 IoTDB-Grafana module error when getting the timeseries list from Grafana
  • IOTDB-133 Some content is mistaken for links
  • System memory check failure in iotdb-env.sh
  • Time zone bug in different region
  • DateTimeUtilsTest UT bug
  • Problem discovered by Sonar
  • Openjdk11 + linux11 does not work on travis
  • Start JDBC service too slowly
  • JDBC cannot be closed
  • Close bug in sync thread
  • Bug in MManager to get all file names of a path
  • Version files of different storage groups are placed into the same place
  • Import/export csv script bug
  • Log level and stack print in test
  • Bug in TsFile-Spark-Connector
  • A doc bug of QuickStart.md