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重点研发计划2017 / incubator-iotdbJavaApache-2.0

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Jialin Qiao   Release folder (#282) 2019-07-22
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Xiangdong Huang   Improve maven for stability (#1554) 2020-07-24
# 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
Xiangdong Huang   Cherry from 0.10.1 (#1576) 2020-07-29
* 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
Jialin Qiao   Release folder (#282) 2019-07-22
xiangdong huang   add v0.10 release to RELEASE_NOTES.md 2020-06-13
# 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 speical 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 narive 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 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
Lei Rui   Update master docs after releasing 0.9.1 (#732) 2020-01-13
# 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
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
# Apache IoTDB (incubating) 0.9.0
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
## 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
## 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
* 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
qiaojialin   add fix start script 2019-11-16
* Fix start script to set JAVA_HOME
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
Lei Rui   Update master docs after releasing 0.9.1 (#732) 2020-01-13
# 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 
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
# Apache IoTDB (incubating) 0.8.1This 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) 0.8.0This is the first official release of Apache IoTDB after joining the Incubator.
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
## New Features
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
* 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
* 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 changesIf you use the previous unofficial version 0.7.0. It is incompatible with 0.8.0.## Miscellaneous changes
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
* 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
* 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
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
* 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
## Bug Fixes
Jialin Qiao   0.9.0 release notes (#539) 2019-11-12
* 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 <username> on <path> 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
Jialin Qiao   remove version in doc names, change release_notes to markdown format (#280) 2019-07-22
* 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