Apache IoTDB 0.13.0

New Features

• [IOTDB-924] Support insert multi rows in SQL
• [IOTDB-959] Add Create Storage Group Grammar
• [IOTDB-1037] set rpc_compression as a parameter in JDBC URL
• [IOTDB-1059] Support sql statement insert without timestamp
• [IOTDB-1143] Support Continuous query
• [IOTDB-1199] Support aligned timeseries and schema template
• [IOTDB-1319] Support Trigger
• [IOTDB-1391] Add a new Aggregation function extreme (max absolute value)
• [IOTDB-1399] Add a session interface to connect multiple nodes
• [IOTDB-1400] Support arithmetic operations in SELECT clauses
• [IOTDB-1403] Dictionary encoding for TEXT
• [IOTDB-1490] Add built-in UDTFs: sinh, conh, tanh
• [IOTDB-1514] Support null in insertTablet
• [IOTDB-1524] Support SELECT ... INTO ... clause
• [IOTDB-1647] Nested Expressions in SELECT clauses
• [IOTDB-1673] CLI upgrade to JLine3
• [IOTDB-1739] Constant timeseries generating functions (const, pi and e)
• [IOTDB-1760] Support avg, count, extreme, first_value, last_value, max_time, max_value, min_time, min_value, sum aggregations in group by fill
• [IOTDB-1761] Add metric framework for IoTDB
• [IOTDB-1775] Add CAST function to convert data type
• [IOTDB-1823] Support group by multi level
• [IOTDB-1844] Query support timeseries prefix and suffix matching: root.*sg*
• [IOTDB-1859] Support REST API
• [IOTDB-1860] New Grafana plugin
• [IOTDB-1886] Support Constant Expressions in Select Clauses
• [IOTDB-1973] Supports aggregate queries, constants, and arithmetic nested expressions in SELECT clauses
• [IOTDB-1986] Support select UDF as alisa clauses
• [IOTDB-1989] Spark-IoTDB-connector support inserting data
• [IOTDB-2131] Support previous, linear, constant value fill funtion New fill
• [IOTDB-2593] Support using IoTDB with JDK17
• [ISSUE-3811] Provide a data type column for the last query dataset
• add rabbitmq example

Improvements

• [IOTDB-1280] Rewrite the Antlr grammar file
• [IOTDB-1372] Enhance management of TsFileResource
• [IOTDB-1428] Ask query threads to quit if query is timeout
• [IOTDB-1450] Deletion should only delete related time partitions
• [IOTDB-1463] Implement builder pattern for Session and SessionPool
• [IOTDB-1477] Optimize code logic of generateAlignByDevicePlan()
• [IOTDB-1559] Refactor the IT framework
• [IOTDB-1564] Make hearbeat and election timeout parameters be configurable
• [IOTDB-1581] Consider deletions when recovering tsFileResource of incomplete tsfile
• [IOTDB-1607] Optimize Tracing
• [IOTDB-1613] Recover mods file if write modification failed
• [IOTDB-1639] Refactoring the cluster class structure to make it consistent with the server module
• [IOTDB-1730] client-cpp, enhance session::insertTablet() etc.'s performance
• [IOTDB-1852] Accelerate queryies by using statistics
• [IOTDB-1857] Remove useless handle logic for CountPlan in executeNonQuery in cluster module
• [IOTDB-1884] Distinguish between zero and null values in sum aggregation
• [IOTDB-1924] Remove the operation of clearing the cache after the compaction is over
• [IOTDB-1950] Add Bloom Filter cache for query
• [IOTDB-2001] Remove redundant StorageGroupNotReadyException
• [IOTDB-2011] Update last cache while doing show latest timeseries query
• [IOTDB-2022] SessionDataSet implements AutoCloseable
• [IOTDB-2075] Accelerate the process of insertTablets by using thread pool
• [IOTDB-2119] IoTDB CSV export tools add timestamp accuracy setting function
• [IOTDB-2162] Simplify the recovery merge process
• [IOTDB-2176] Limit target chunk size when performing inner space compaction
• [IOTDB-2193] Reduce unnecessary lock operations of RaftLogManager to improve writing performance
• [IOTDB-2195] Control the concurrent query execution thread
• [IOTDB-2632] Set compaction_write_throughput_mb_per_sec to 16 by default
• [ISSUE-3445] New compaction strategy and compaction scheduling strategy
• [ISSUE-3856] refine exception handling logic in commitTo in RaftLogManager
• [Cluster] No need to shake hands with itself when one node restart

Incompatible changes

• [IOTDB-1026] Support wildcard ** in Path And Replace PrefixPath usage with PathPattern in IOTDB-SQL
• [IOTDB-1620] Support backtick (`) character and double quotes (") to quote identifiers
• [IOTDB-1650] Rename the sql command move to unload

Miscellaneous changes

• [IOTDB-1342] modify error message about LIMIT and OFFSET used in conjunction with the FILL clause
• [IOTDB-1372] delete devices field in FileTimeIndex
• [IOTDB-1531] Check tsfile creation time when recovering
• [IOTDB-1541] Change sequence of wal and memtable in insertion
• [IOTDB-1923] Separate the request unpacking and execution processing logic of TSServiceImpl
• [IOTDB-1969] Remove statistic resources of old metric framework from iotdb-server
• [IOTDB-2014] MicrometerPrometheusReporter#getReporterType return null
• [IOTDB-2043] refactor: remove haveSorted param from Session
• [IOTDB-2154] add TsFileUtils.isTsFileComplete
• [IOTDB-2206] Rename StorageGroupProcessor to VirtualStorageGroupProcessor
• [IOTDB-2208] Reconstruct the process of generating resultset header of query
• [ISSUE-4047] Generic type in Statistics extend Serializable
• Add compaction version in cache key
• Add a constructor of IoTDBDescriptorHolder to prohibit instantiation

Bug Fixes

• [IOTDB-1266] Fix SHOW TIMESERIES will only display 2000 timeseries
• [IOTDB-1478] The whole IoTDB can not read/write if any one sg is not ready
• [IOTDB-1562] Fix incorrect exception processing in insertXXX() API
• [IOTDB-1583] Raft log failed to be committed in cluster version
• [IOTDB-1592] BugFix: SLimit Not effective in align by device
• [IOTDB-1736] Fix error code is not printed in TSServiceImpl's log
• [IOTDB-1749] sync-tool's lockInstance() dose not take effect
• [IOTDB-1758] sync-tool, empty uuid file cause tool can not auto-recovery
• [IOTDB-1848] Failed to initialize pool: Does not support setReadOnly in grafana-connector
• [IOTDB-1853] Fix bug about more than one TimeseriesMetadata in TsFile
• [IOTDB-2010] fix incomplete show timeseries result
• [IOTDB-2021] Fix Bloom Filter Cache doesn't take effect bug
• [IOTDB-2060] Fix NPE when using fill without a filter
• [IOTDB-2074] Fix NullPointerException when recovering compaction in MacOS
• [IOTDB-2077] Unexpected exception when executing raw data query without VF with limit clause
• [IOTDB-2088] Fix IndexOutOfBound exception in AggregationPlan.groupAggResultByLevel
• [IOTDB-2116] Fix all client connections are stuck bug caused by logback bug
• [IOTDB-2129] Wrong result returned when querying by nested expressions with aliases
• [IOTDB-2143] fix wrong precision in cluster mode
• [IOTDB-2153] [IOTDB-2157] fix incorrect path search space
• [IOTDB-2159] Fix wrong status code when inserting data to a read-only cluster
• [IOTDB-2163] Fix unexpected amount of columns in a cluster slimit query
• [IOTDB-2174] Fix Regexp filter serializing and deserializing error
• [IOTDB-2180] Fix show latest timeseries in cluster
• [IOTDB-2183] Fix the config problems in cluster mode
• [IOTDB-2185] Fix get an exception when parsing the header of CSV
• [IOTDB-2209] Fix logback CVE-2021-42550 issue
• [IOTDB-2251] [IOTDB-2252] Fix Query deadlock
• [IOTDB-2267] UDF: Error code 500 caused by user logic
• [IOTDB-2282] fix tag recovery bug after tag upsert
• [IOTDB-2290] Fix Incorrect query result in C++ client
• [IOTDB-2520] Fix list user privilege root returns empty
• [IOTDB-2544] Fix tag info sync error during metadata sync
• [IOTDB-2550] Avoid show timeseries error after alter tag on sync sender
• [IOTDB-2654] Fix Alias doesn't show when using group by level
• Fix CPP client could not be successfully built on windows
• Fix dead lock in setDataTTL method

Apache IoTDB 0.12.5

New Features

• [IOTDB-2078] Split large TsFile tool
• [IOTDB-2192] Support extreme function

Improvements

• [IOTDB-1297] Refactor the memory control when enabling time partitions
• [IOTDB-2195] Control the concurrent query execution thread
• [IOTDB-2475] Remove sg not ready log in batch process
• [IOTDB-2502] Add query sql in error log if encountering exception
• [IOTDB-2506] Refine the lock granularity of the aggregation query
• [IOTDB-2534] add character support while using double quote
• [IOTDB-2562] Change default value of sync mlog period parameter
• Avoid too many warning logs being printed, when opening too many file handlers

Bug Fixes

• [IOTDB-1960] Fix count timeseries bug in cluster mode
• [IOTDB-2174] Fix Regexp filter serializing and deserializing error
• [IoTDB-2185] fix get an exception bug when parsing the header of CSV
• [IOTDB-2194] Fix SHOW TIMESERIES will only display 2000 timeseries in cluster mode
• [IOTDB-2197] Fix datatype conversion exception in Spark Connector
• [IOTDB-2209] Fix logback CVE-2021-42550 issue
• [IOTDB-2219] Fix query in-memory data is incorrect in cluster mode
• [IOTDB-2222] Fix OOM and data was written in incorrectly bugs of Spark Connector
• [IOTDB-2251] [IOTDB-2252] Fix Query deadlock
• [IOTDB-2282] fix tag recover bug after tag update
• [IOTDB-2320] MemoryLeak cause by wal Scheduled trim task thread
• [IOTDB-2381] Fix deadlock caused by incorrect buffer pool size counter
• [IOTDB-2400] Fix series reader bug
• [IOTDB-2426] WAL deadlock caused by too many open files
• [IOTDB-2445] Fix overlapped data should be consumed first bug
• [IOTDB-2499] Fix division by zero error when recovering merge
• [IOTDB-2507] Fix NPE when merge recover
• [IOTDB-2528] Fix MLog corruption and recovery bug after killing system
• [IOTDB-2532] Fix query with align by device can't get value after clear cache
• [IOTDB-2533] Fix change max_deduplicated_path_num does not take effect
• [IOTDB-2544] Fix tag info sync error during metadata sync
• [IOTDB-2550] Avoid show timeseries error after alter tag on sync sender
• [IOTDB-2567] Fix thread and ByteBuffer leak after service stopped
• [IOTDB-2568] "show query processlist" is blocked
• [IOTDB-2580] Fix DirectByteBuffer and thread leak when deleting storage group
• [IOTDB-2584] Fix cross space compaction selector
• [IOTDB-2603] Fix compaction recover
• [IOTDB-2604] Fix batch size is invalid in import-csv tool
• [IOTDB-2620] Unrecognizable operator type (SHOW) for AuthorityChecker
• [IOTDB-2624] Fix "overlapped data should be consumed first" occurs when executing query
• [IOTDB-2640] Fix cross compaction recover bug
• [IOTDB-2641] Fix time range of TsFile resource overlaps after unseq compaction
• [IOTDB-2642] Fix the new file has a higher compact priority than the old file in unseq compaction
• Fix a logical bug in processPlanLocally in cluster mode
• Throw Exception while using last query with align by device
• Add a judgement to determine raft log size can fit into buffer before log appending in cluster mode
• Fix grafana can't be used bug

Apache IoTDB 0.12.4

New Features

• [IOTDB-1823] group by multi level

Improvements

• [IOTDB-2027] Rollback invalid entry after WAL writing failure
• [IOTDB-2061] Add max concurrent sub query parameter, read data in batches to limit max IO and add max cached buffer size configuration
• [IOTDB-2065] release TsFileSequenceReader soon when it is no longer used
• [IOTDB-2072] Remove TVListAllocator to reduce the TVList mem cost
• [IOTDB-2101] Reduce the memory footprint of QueryDataSource
• [IOTDB-2102] Push limit operator down to each reader
• [IOTDB-2123] Accelerate recovery process
• update user guide for cpp-cpi and disable compiling nodejs in cpp-cli
• Ignore too many WAL BufferOverflow log

Bug Fixes

• [IOTDB-1408] Statement with 'as' executes incorrectly in mutil-path scenes
• [IOTDB-2023] Fix serializing and deserializing bugs of Filters
• [IOTDB-2025] Fix count nodes and devices incorrectly in cluster
• [IOTDB-2031] Fix incorrect result of descending query with value filter in cluster
• [IOTDB-2032] Fix incorrect result of descending query with multiple time partitions
• [IOTDB-2039] Fix data redundant after too many open files exception occurs during compaction
• [IOTDB-2047] Fix NPE when memControl is disabled and insert TEXT value to a non-TEXT series
• [IOTDB-2058] Fix Query is blocked without sub-query-threads exist bug
• [IOTDB-2063] Fix MinTimeDescAggregationResult implementation bug
• [IOTDB-2064] Fix the NPE caused by map serde
• [IOTDB-2068] Fix GZIP compressor meets ArrayIndexOutOfBoundsException
• [IOTDB-2124] the filtering condition does not take efffect for last query in cluster
• [IOTDB-2138] Fix data loss after IoTDB recover
• [IOTDB-2140] Fix merge throw NullPointerException
• [IOTDB-2152] PyClient: Override __eq__() of TSDataType, TSEncoding and Compressor to avoid unexpected comparation behaviour
• [IOTDB-2160] Fix cluster groupby query cross-node reference leaks
• [ISSUE-3335] Fix the bug of start-cli.sh -e mode can't work with wild card *
• fix memory leak: replace RandomDeleteCache with Caffine CacheLoader
• Fix connection refused using session when users forget to set client ip

Apache IoTDB 0.12.3

Improvements

• [IOTDB-842] Better Export/Import-CSV Tool
• [IOTDB-1738] Cache paths list in batched insert plan
• [IOTDB-1792] remove tomcat-embed dependency and make all transitive dependencies versions consistent
• [ISSUE-4072] Parallel insert records in Session
• Print the file path while meeting error in case of reading chunk

Bug Fixes

• [IOTDB-1275] Fix backgroup exec for cli -e function causes an infinite loop
• [IOTDB-1287] Fix C++ class Session has 2 useless sort()
• [IOTDB-1289] fix CPP mem-leak in SessionExample.cpp insertRecords()
• [IOTDB-1484] fix auto create schema in cluster
• [IOTDB-1578] Set unsequnce when loading TsFile with the same establish time
• [IOTDB-1619] Fix an error msg when restart iotdb-cluster
• [IOTDB-1629] fix the NPE when using value fill in cluster mode
• [IOTDB-1632] Fix Value fill function fills even when the data exists
• [IOTDB-1651] add reconnect to solve out of sequence in sync module
• [IOTDB-1659] Fix Windows CLI cannot set maxPRC less than or equal to 0
• [IOTDB-1670] Fix cli -e mode didn't fetch timestamp_precision from server
• [IOTDB-1674] Fix command interpret error causing somaxconn warning failed
• [IOTDB-1677] Fix not generate file apache-iotdb-0.x.x-client-cpp-linux-x86_64-bin.zip.sha512
• [IOTDB-1678] Fix client-cpp session bug: can cause connection leak.
• [IOTDB-1679] client-cpp: Session descontruction need release server resource
• [IOTDB-1690] Fix align by device type cast error
• [IOTDB-1693] fix IoTDB restart does not truncate broken ChunkGroup bug
• [IOTDB-1703] Fix MManager slow recover with tag
• [IOTDB-1714] fix Could not find or load main class when start with jmx on win
• [IOTDB-1723] Fix concurrency issue in compaction selection
• [IOTDB-1726] Wrong hashCode() and equals() method in ChunkMetadata
• [IOTDB-1727] Fix Slow creation of timeseries with tag
• [IOTDB-1731] Fix sync error between different os
• [IOTDB-1733] Fix dropping built-in function
• [IOTDB-1741] Avoid double close in level compaction execution
• [IOTDB-1785] Fix Illegal String ending with . being parsed to PartialPath
• [IOTDB-1836] Fix Query Exception Bug after deleting all sgs
• [IOTDB-1837] Fix tagIndex rebuild failure after upgrade mlog from mlog.txt to mlog.bin
• [IOTDB-1838] The compacting status in SGP is always false
• [IOTDB-1846] Fix the error when count the total number of devices in cluster mode
• [IoTDB-1847] Not throw excpetion when pulling non--existent time series
• [IOTDB-1850] Fix deserialize page merge rate limiter
• [IoTDB-1865] Compaction is blocking when removing old files in Cluster
• [IOTDB-1868] Use RwLock to reduce the lock time for nodeRing
• [IOTDB-1872] Fix data increases abnormally after IoTDB restarts
• [IOTDB-1877] Fix Sync recovery and reconnection bugs in both sender and receiver
• [IOTDB-1879] Fix some Unsequence files never be merged to higher level or Sequence folder
• [IOTDB-1887] Fix importing csv data containing null throws exception
• [IOTDB-1893] Fix Can not release file lock in sync verify singleton
• [IOTDB-1895] Cache leader optimization for batch write interfaces on multiple devices
• [IOTDB-1903] Fix IndexOutOfRangeException when starting IoTDB
• [IoTDB-1913] Fix When exporting a amount of data from csv, it will report network error or OOM
• [IOTDB-1925] Fix the modification of max_select_unseq_file_num_in_each_compaction parameter does not take effect
• [IOTDB-1958] Add storage group not ready exception
• [IOTDB-1961] Cluster query memory leak
• [IOTDB-1975] OOM caused by that MaxQueryDeduplicatedPathNum doesn't take effect
• [IOTDB-1983] Fix DescReadWriteBatchData serializing bug
• [IOTDB-1990] Fix unchecked null result by calling IReaderByTimestamp.getValuesInTimestamps()
• [ISSUE-3945] Fix Fuzzy query not support multiDevices and alignByDevice Dataset
• [ISSUE-4288] Fix CI issue caused by the invalid pentaho download url
• [ISSUE-4293] SessionPool: InterruptedException is not properly handled in synchronized wait()
• [ISSUE-4308] READ_TIMESERIES privilege granted to users and roles can not take effect when quering by UDFs
• fix merge ClassCastException: MeasurementMNode
• change sync version check to major version
• init dummyIndex after restart cluster

Apache IoTDB 0.12.2

New Features

• [IOTDB-959] Add create storage group Grammar
• [IOTDB-1399] Add a session interface to connect multiple nodes
• [IOTDB-1466] Support device template
• [IOTDB-1491] UDTF query supported in cluster
• [IOTDB-1496] Timed flush memtable
• [IOTDB-1536] Support fuzzy query REGEXP
• [IOTDB-1561] Support fill by specific value
• [IOTDB-1565] Add sql: set system to readonly/writable
• [IOTDB-1569] Timed close TsFileProcessor
• [IOTDB-1586] Support mysql-style Like clause
• [ISSUE-3811] Provide a data type column for the last query dataset
• TTL can be set to the prefix path of storage group
• add JMX monitor to all ThreadPools in the server module

Improvements

• [IOTDB-1566] Do not restrict concurrent write partitions
• [IOTDB-1585] ModificationFile‘s write interface blocking
• [IOTDB-1587] SessionPool optimization: a more aggressive Session creation strategy
• Use StringCachedPool in TsFileResource to reduce the memory size
• write performance optimization when replicaNum == 1
• Optimize Primitive Array Manager
• Function Improvement: add overlapped page rate in Tracing

Bug Fixes

• [IOTDB-1282] fix C++ class SessionDataSet mem-leak
• [IOTDB-1407] fix Filtering time series based on tags query fails Occasionally
• [IOTDB-1437] Fix the TsFileSketchTool NPE
• [IOTDB-1442] Time filter & TTL do not take effect in cluster
• [IOTDB-1452] remove compaction log/ change logger to daily
• [IOTDB-1447] ClientPool is blocking other nodes when one node fails
• [IOTDB-1456] Fix Error occurred while executing delete timeseries statement
• [IOTDB-1461] Fix compaction conflicts with ttl
• [IOTDB-1462] Fix cross space compaction recover null pointer bug
• [IOTDB-1464] fix take byte array null pointer
• [IOTDB-1469] fix cross space compaction lost data bug
• [IOTDB-1471] Fix path not right in "sg may not ready" log
• [IOTDB-1475] MeasurementId check while create timeseries or template/ disable time or timestamp in timeseries path
• [IOTDB-1488] Fix metaMember's forwarding clientPool timeout in cluster module
• [IOTDB-1494] fix compaction block flush bug
• [IoTDB-1499] Remove series registration using IoTDBSink
• [IoTDB-1501] Fix compaction recover delete tsfile bug
• [IOTDB-1529] Fix mlog recover idx bug and synchronize setStorageGroup
• [IOTDB-1537] fix insertTablet permission
• [IOTDB-1539] Fix delete operation with value filter is abnormal
• [IOTDB-1540] Bug Fix: 500 when using IN operator
• [IOTDB-1541] Fix query result not right due to non-precise time index of resource
• [IOTDB-1542] Cpp client segment fault: char[] buffer overflow caused by long exception message
• [IOTDB-1545] Query dataset memory leak on server caused by cpp client
• [IOTDB-1546] Optimize the Upgrade Tool rewrite logic to reduce the temp memory cost
• [IOTDB-1552] Only allow equivalent filter for TEXT data type
• [IOTDB-1556] Abort auto create device when meet exception in setStorageGroup
• [IOTDB-1574] Deleted file handler leak
• [IOTDB-1580] Error result of order by time desc when enable time partition
• [IOTDB-1584] Doesn't support order by time desc in cluster mode
• [IOTDB-1588] Bug fix: MAX_TIME is incorrect in cluster mode
• [IOTDB-1594] Fix show timeseries returns incorrect tag value
• [IOTDB-1600] Fix InsertRowsOfOneDevicePlan being not supported in cluster mode
• [IOTDB-1610] Fix TsFileRewriteTool writing incorrect data file
• [ISSUE-3116] Bug when using natural month unit in time interval in group by query
• [ISSUE-3316] Query result with the same time range is inconsistent in group by query
• [ISSUE-3436] Fix query result not right after deleting multiple time interval of one timeseries
• [ISSUE-3458] fix load configuration does not take effect
• [ISSUE-3545] Fix Time interval value is disorder in group by month
• [ISSUE-3653] fix Max_time and last return inconsistent result
• [ISSUE-3690] Memory leaks on the server when cpp client invokes checkTimeseriesExists
• [ISSUE-3805] OOM caused by Chunk cache
• [ISSUE-3865] Meaningless connection reset issues caused by low default value for SOMAXCONN
• Fix DataMigrationExample OOM if migrate too many timeseries
• Handle false positive cases which may cause NPE of tsfile bloom filter
• Fix Windows shell error on JDK11 & fix iotdb-env.bat not working
• Fix cluster auto create schema bug when retry locally
• Fix thrift out of sequence in cluster module
• Skip non exist measurement in where clause in align by device
• fix blocking query when selecting TsFile in compaction
• Fix redundant data in compaction recover
• Fix load tsfile with time partition enable

Incompatible changes

• [IOTDB-1485] Replace tsfile_size_threshold by unseq_tsfile_size/seq_tsfile_size

Miscellaneous changes

• [IOTDB-1499] Remove unused exception throwing notation in IoTDBSink
• [IOTDB-1500] Remove current dynamic query memory control
• [ISSUE-3674] Disable thrift code generation for Javascript
• enable cacheLeader by default
• add audit log when execute delete and set sg for tracing
• modify nodeTool user to root

Apache IoTDB 0.12.1

Bug Fixes

• [GITHUB-3373] Remove the broken cached leader connection & optimize the insertRecords method in session
• [IOTDB-1433] Fix bug in getMetadataAndEndOffset when querying non-exist device
• [IOTDB-1432] fix level compaction loss data
• [IOTDB-1427] Fix compaction lock with query
• [IOTDB-1420] Fix compaction ttl bug
• [IOTDB-1419] Remove redundant clearCompactionStatus, fix continuous compaction doesn't take effect when enablePartition
• [IOTDB-1415] Fix OOM caused by ChunkCache
• [IOTDB-1414] NPE occurred when call getStorageGroupNodeByPath() method using not exist path
• [IOTDB-1412] Unclear exception message thrown when executing empty InsertTabletPlan
• [IOTDB-1411] Fix thriftMaxFrameSize and thriftDefaultBufferSize does not in effect
• [IOTDB-1398] Do not select unseq files when there are uncompacted old unseq files
• [IOTDB-1390] Fix unseq compaction loss data bug
• [IOTDB-1384] Fix group by bug
• [ISSUE-3378] Fix NPE when clear upgrade folder; Fix some upgraded pageHeader missing statistics
• [GITHUB-3339] Try to fix sg dead lock
• [GITHUB-3329] Fix upgrade NPE and DeadLock
• [GITHUB-3319] Fix upgrade tool cannot close file reader
• [IOTDB-1212] Fix The given error message is not right when executing select sin(non_existence) from root.sg1.d1
• [IOTDB-1219] Fix a potential NPE issue in UDF module
• [IOTDB-1286] Fix 4 C++ mem-leak points
• [IOTDB-1294] Fix delete operation become invalid after compaction
• [IOTDB-1313] Fix lossing time precision when import csv with unsupported timestamp format
• [IOTDB-1316] The importCsv tool should continue inserting if a part of insertion failed
• [IOTDB-1317] Fix log CatchUp always failed due to not check the follower's match index
• [IOTDB-1323] Fix return a success message when encounter RuntimeException during the insertion process
• [IOTDB-1325] Fix StackOverflow Exception in group by natural month query
• [IOTDB-1330] Fix the load tsfile bug when the cross multi partition's tsfile only have one page
• [IOTDB-1348] Fix Last plan not work in cluster mode
• [IOTDB-1376] Fix BatchProcessException was not correctly handled in BaseApplier
• [ISSUE-3277] Fix TotalSeriesNumber in MManager counted twice when recovering
• [ISSUE-3116] Fix bug when using natural month unit in time interval in group by query
• [ISSUE-3309] Fix InsertRecordsOfOneDevice runs too slow
• Fix the plan index is always zero when using insertRecords interface to run the cluster
• Add authority check for users create timeseries using executeBatch interface without the privilege
• Fix versionInfo NPE when query upgrading 0.11 tsfile
• Fix upgrade tool cannot load old tsfile if time partition enabled in 0.11
• Fix import csv throw ArrayOutOfIndexError when the last value in a line is null
• Fix upgrade tool cannot close file reader

Improvements

• [GITHUB-3399] Change the default primitive array size to 32
• [IOTDB-1387] Support Without Null ALL in align by device clause, Filter RowRecord automatically if any column in it is null or all columns are null
• [IOTDB-1385] Extract the super user to the configuration
• [IOTDB-1315] ExportCsvTool should support timestamp yyyy-MM-dd'T'HH:mm:ss.SSSZ
• [IOTDB-1339] optimize TimeoutChangeableTSnappyFramedTransport
• [IOTDB-1356] Separate unseq_file_num_in_each_level from selecting candidate file in unseq compaction
• [IOTDB-1357] Compaction use append chunk merge strategy when chunk is already large enough
• [IOTDB-1380] Automatically close the dataset while there is no more data
• Optimize sync leader for meta

New Features

• [GITHUB-3389] TTL can be set to any path
• [GITHUB-3387] Add parameter compaction_interval=10000ms
• [IOTDB-1190] Fully support HTTP URL char set in timeseries path
• [IOTDB-1321][IOTDB-1322] Filter RowRecord automatically if any column in it is null or all columns are null
• [IOTDB-1357] Compaction use append chunk merge strategy when chunk is already large
• [ISSUE-3089] Make it possible for storage groups to have name with hyphen

Miscellaneous changes

• [GITHUB-3346] upgrade netty and claim exclusion for enforcer check
• [IOTDB-1259] upgrade libthrift from 0.12.0/0.13.0 to 0.14.1
• Uncomment the less used configurations
• Enable the configration concurrent_writing_time_partition

Apache IoTDB 0.11.4

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

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

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