3.0.1.1

Enhancements:

• Performance optimization for select count(*)
• Optimization about Performance scalability for STMT inserting

Fixed Bugs:

• taosd can't start after being stopped forced during high stress writing
• taosd can't be restarted after crashing
• tasod crash when creating 200 million tables and can't restart
• taosd OOM when querying the number of subtables in parallel with creating subtables
• taosdump crash when exporting data
• taosBenchmark crash during high stress writing
• Calculation error in SUM() function
• Error "Table not exists" after dropping database
• "Show create table" command can't show the comment
• A few other crash problems in taosd
• A few memory leak problems in taosd

3.0.1.0

Enhancements

• Performance optimization for both writing and querying
• Optimization for query plan in selecting from a super table
• Performance optimization for inserting RSMA data
• Performance optimization for last_row on super table or subtable
• Space is supported when enclosed by escape character ``
• Query result can be output to file using ">>" in TDengine CLI
• "show vnodes" can be used in TDengine CLI
• UpTime metric is refined to reflect the true UpTime
• State Window can be used without aggregate
• Some show commands are refined to display more information
• Non-privileged user is not allowed to query information_schema and performance_schema by default
• Non-privileged user is not allowed to create database if SYSINFO is set to 0
• max/min can work with timestamp type
• Stream computing supports deleting data

Fixed Bugs

• Data loss after inserting new data and committing
• Data loss when inserting into RSMA using taosBenchmark
• Data loss when using schemaless protocols to write
• taosd crash when inserting 200,000 tables with 1,000 rows in each table
• taosd crash when inserting into RSMA table
• taosd crash when subscribing to a database
• taosd crash caused by parallel query
• taosd crash caused by sample function on high volume of data
• taosd crash caused by drop database while there are still topics in that DB
• taosd crash if dropping a database while there is still writing into it
• taosd crash when flushing database after a column of NCHAR type is updated to NULL
• taosd crash when inserting into RSMA using two taosBenchmark in parallel
• taosd crash if doing "drop stable" in parallel with taosBenchmark writing
• taosd crash caused by Prometheus remote_write
• taosd crash if there is dot character in db name enclosed by ``
• taosd crash when selecting with order by
• Memory leak in TDengine client driver
• Memory leak caused by interp function
• Memory leak when doing aggregation query on 1 million table while each table has 100 rows
• Memory leak caused by creating/droping Time Range SMA
• Linux package is wrongly reported by 360 as Trojan
• Client program crash caused by chemaless_insert in taosc
• Incorrect processing of apercentile function used with t-digest in nested query

What's Changed

• doc: update 3.0 doc by @afwerar in #16309
• doc: update 3.0 doc jsx error by @afwerar in #16310
• docs: Introduction - fixed broken link by @sean-tdengine in #16311
• docs: Get Started - Docker - fixed sequencing by @sean-tdengine in #16312
• docs: Getting Started Package - Fixed sequencing by @sean-tdengine in #16313
• docs: Time-Series Extensions - added pseudocolumns by @sean-tdengine in #16314
• docs: Select - fixed typo by @sean-tdengine in #16315
• docs: functions - fixed typo by @sean-tdengine in #16316
• doc: update 3.0 mac doc by @afwerar in #16325
• fix(query): restrict fill(none) in interp by @glzhao89 in #16318
• docs: fix interp manual cn version by @glzhao89 in #16320
• docs: fix interp manual en version by @glzhao89 in #16321
• fix: fix stack overflow issue by @dapan1121 in #16319
• fix(stream): state window update by @54liuyao in #16322
• docs: update TDinsight document by @huolibo in #16277
• fix: cmake 3.10 failed by @sangshuduo in #16324
• feat: update taostools 6bde102 for3.0 by @sangshuduo in #16329
• fix: update telemetry and trans timer by @guanshengliang in #16317
• docs: monitor for 3.0 by @huolibo in #16333
• docs: remove version number text from docs by @sangshuduo in #16281
• doc: update 3.0 mac doc by @afwerar in #16330
• fix: auto create table insert statement check table name by @xiao-yu-wang in #16334
• release: merge from main to 3.0 by @guanshengliang in #16338
• ci: git remote prune origin before git pull by @tangfangzhi in #16345
• docs: refactor release page by @dingbo8128 in #16346
• Update README.md by @sangshuduo in #16347
• refactor(query): do some internal refactor. by @hjxilinx in #16342
• docs: change label of release page by @dingbo8128 in #16350
• docs: update telegraf and collectd english version pictures by @sangshuduo in #16353
• docs: update it devops telegraf for3.0 by @sangshuduo in #16356
• docs: fix en/20-third-party/emqx/client-num.webp by @sangshuduo in #16357
• docs:update test report of English version by @wenzhouwww in #16351
• enh: increase startup time monitoring by @guanshengliang in #16341
• feat: update taostools 2af2222 for3.0 by @sangshuduo in #16358
• refactor(query): do some internal refactor. by @hjxilinx in #16354
• docs: getting started docker by @sean-tdengine in #16369
• ci: git remote prune origin before git pull by @tangfangzhi in #16368
• fix(query): fix the invalid last block check condition. by @hjxilinx in #16364
• fix(query): fix the last block check condition. by @hjxilinx in #16365
• enh: add client performance trace by @dapan1121 in #16362
• fix: fix invalid memory access cause of job freed by @dapan1121 in #16361
• fix:add log for dealing with problem: "unexpected generic error in query" by @wangmm0220 in #16363
• feat(stream): support tdb state backend by @cosmic-jc in #16352
• fix: commit coredump by @hzcheng in #16366
• docs: hide 3.0 download by @dingbo8128 in #16375
• refactor: adjust telemetry interval by @guanshengliang in #16373
• fix(query): change mnd redo action sleep by @glzhao89 in #16339
• refactor(stream): refine stream backend interface by @cosmic-jc in #16376
• feat: update taostools 833b721 for3.0 by @sangshuduo in #16378
• build: cmake warning error by @afwerar in #16344
• fix: fix json tag err msg by @yihaoDeng in #16391
• fix: tdb page cache hash page removing fix by @stephenkgu in #16389
• enh: assign specific threads for rsma by @kailixu in #16385
• fix: typo coredump by @hzcheng in #16377
• fix: support window pseduo column _wstart,_wend,_wduration for fill operator by @shenglian-zhou in #16395
• feat: system table visible permission by @xiao-yu-wang in #16382
• docs:add description of apt-get remove tdengine by @jiacy-jcy in #16399
• fix(query): check return value and do some internal refactor. by @hjxilinx in #16396
• docs:add aptremove of tdengine for en document by @jiacy-jcy in #16400
• fix(query): fix multiple interp used result number of rows incorrect by @glzhao89 in #16397
• release: merge from main to 3.0 by @guanshengliang in #16372
• docs: update k8s docs for3.0 by @sangshuduo in #16401
• docs: correct epoch definition by @arielyang in #16402
• docs: correct epoch definition in English by @arielyang in #16403
• enh: update table meta cache after creating table by @dapan1121 in #16386
• refactor: make uptimeInterval can be configured by @guanshengliang in #16405
• enh: update table meta after auto creating table by @dapan1121 in #16406
• fix: release ofp when encoding and decoding by @stephenkgu in #16408
• fix: stats normal tables' timeseries by @stephenkgu in #16413
• fix(stream): fix handling invalid option by @cosmic-jc in #16414
• fix: http report possible except by @yihaoDeng in #16416
• fix: use...

2.6.0.16

Release Notes

from：release/ver-2.6.0.14
to：release/ver-2.6.0.16

FIX BUGS:
fix: remove assert for pQInfo->rspContent NULL check (#16337)
fix: check the upper boundary of startPos in hashIntervalAgg (#16138)

ver-3.0.0.1

Fixed Bugs:
fix: resolved some memory leak in TDengine client driver
fix: resolved the problem of console popup when invoking TDengine client driver on Windows
fix: removed dependency on some visutal studio libraries on Windows
fix: fixed taosd crash caused by TCP port scanning program
fix: fixed syntax parsing, memory leak and crash caused by interp function
fix: resolved some problems about syntax parsing
fix: corrected the query result of elapsed, sum and min function in some cases
fix: corrected wrong result of querying sub table number with conditions
fix: fixed a few crash problems in stream processing
fix: fixed a crash problem which happened occasionally in interval query
fix: prevented from creating a stable with same name as an existing normal table
fix: fixed the problem of automatic appending "_u" to table name when using db.tbname to create table
fix: fixed crash on Windows after writing some amount of data
fix: fixed crash when writing by Prometheus through remote_write

Enhancements:
enh: optimized the data writing performance significantly in case of large number of sub-tables
enh: improved the recovery speed when one dnode is down in case of 3 replications

What's Changed

• docs: fix syntax highlight for rust subscription demo by @zitsen in #16076
• doc: update taos.cfg by @guanshengliang in #16077
• docs: add tmq sample by @huolibo in #16080
• feat: update taostools for3.0 by @sangshuduo in #16078
• docs: modify jdbc version by @huolibo in #16081
• docs: add tmq sample and doc by @huolibo in #16082
• docs: format reference by @huolibo in #16085
• fix: close tbc before returning by @stephenkgu in #16091
• fix: destroy pResList array in error cases by @stephenkgu in #16092
• docs: fix unsigned small int range typo by @sangshuduo in #16093
• download and unpack upx in ~/.taos/externals/upx by @freemine in #16088
• docs: format reference by @huolibo in #16083
• build(deps): bump log4j-core from 2.14.1 to 2.17.1 in /examples/JDBC/taosdemo by @dependabot in #16065
• build(deps): bump log4j-core from 2.14.1 to 2.17.1 in /examples/JDBC/connectionPools by @dependabot in #16064
• fix(query): set ignore flag when skip current datablock. by @hjxilinx in #16095
• build(deps): bump spring-expression from 5.3.2 to 5.3.16 in /examples/JDBC/taosdemo by @dependabot in #16062
• build(deps): bump spring-core from 5.3.2 to 5.3.20 in /examples/JDBC/taosdemo by @dependabot in #16063
• build(deps-dev): bump mysql-connector-java from 8.0.16 to 8.0.28 in /examples/JDBC/taosdemo by @dependabot in #16097
• build(deps): bump fastjson from 1.2.75 to 1.2.83 in /examples/JDBC/taosdemo by @dependabot in #16096
• refactor code by @yihaoDeng in #16099
• refactor code by @yihaoDeng in #16102
• refactor(stream): remove unneccessary param in converting data by @cosmic-jc in #16103
• docs: Update 03-package.md by @wenzhouwww in #16086
• docs(REST): improve REST API document by @huskar-t in #16107
• fix(query): fix nested query length(ltrim/rtrim) result incorrect by @glzhao89 in #16106
• fix(query): fix nested query length(ltrim/rtrim) result incorrect by @glzhao89 in #16105
• Test: add case to support rest API by @wu-champion in #16100
• docs : Update 01-docker.md by @wenzhouwww in #16087
• docs(REST): improve REST API document by @huskar-t in #16112
• enh: insert client optimize by @xiao-yu-wang in #16032
• docs: modify tmq document by @huolibo in #16110
• docs: add sql changes chapter by @xiao-yu-wang in #16121
• fix: set time window overlapping to true when windows end past block end by @shenglian-zhou in #16111
• docs: fix subscribe topics doc style by @zitsen in #16123
• refactor(tmq): put write logic into taosx.c by @cosmic-jc in #16119
• docs: update config parameters by @guanshengliang in #16126
• docs: update config parameters by @guanshengliang in #16127
• test: irate update by @wenzhouwww in #16113
• test : update method about get current time by @wenzhouwww in #16114
• Update the example spelling error by @taos-support in #16101
• enh(stream): reduce table scan by @cosmic-jc in #16134
• fix: select constant error by @xiao-yu-wang in #16129
• docs: modify 3.0 version by @huolibo in #16136
• refactor(sync): add syncIsReadyForRead by @castermode in #16124
• docs(TMQ): improve tmq document by @huskar-t in #16143
• fix(query): fix sample with partition by invalid pageId cause crash by @glzhao89 in #16144
• docs: refine python tmq doc by @zhaoyanggh in #16132
• docs(driver):update C# 3.0 tmq doc under develop/tmq.mdx by @xleili in #16146
• fix(stream): window delete by @cosmic-jc in #16137
• Release/ver 3.0.0.0 by @afwerar in #16151
• feat: remove storage from community by @afwerar in #16150
• docs(driver):update nodejs tmq doc by @xleili in #16156
• feat: fix compile error by @afwerar in #16161
• docs: add taosKeeper doc by @huolibo in #16160
• docs: add rust examples for subscription document by @zitsen in #16163
• feat: remove some win test by @afwerar in #16164
• docs: change default value by @huolibo in #16142
• fix: test case error by @guanshengliang in #16162
• release: merge from main to 3.0 by @guanshengliang in #16165
• feat: fix get dir size error by @afwerar in #16166
• Refact: meta 3.0 by @hzcheng in #16145
• enh(stream): reduce table scan by @cosmic-jc in #16155
• fix: source ts column error by @shenglian-zhou in #16139
• test:update test case irate again by @wenzhouwww in #16148
• test:update test case for mavg by @wenzhouwww in #16152
• Update _sub_python.mdx by @zhaoyanggh in #16169
• docs: update 07-tmq.mdx for python by @zhaoyanggh in #16170
• docs: fix C source code link in subscription by @zitsen in #16178
• refactor(tmq): use tdb to store check info by @cosmic-jc in #16177
• rm code by @yihaoDeng in #16159
• fix(query): set proper ltrim/rtrim result schema bytes by @glzhao89 in #16179
• fix: remove rust-bindings, use official connector instead by @zitsen in #16182
• chore: add lost source code for tmq example of C by @zitsen in #16189
• refactor(sync): add syncNodeDynamicQuorum by @castermode in #16185
• chore: fix source code file name typo by @zitsen in #16190
• refactor(mnode): check drop and alter stb for stream and topic by @cosmic-jc in #16183
• fix: return error if stable's name duplicate with child table by @stephenkgu in #16154
• docs: grafana plugin document by @huolibo in #16181
• opti:logic for get table list by @wangmm0220 in #15975
• refactor(mnode): drop stream task by @cosmic-jc in #16194
• fix(mnode): memory leak by @cosmic-jc in #16204
• enh: rsma batch process by @kailixu in https://github.com/taosdata/TDengine/pull...

2.6.0.14

Release Notes

from：release/ver-2.6.0.12
to：release/ver-2.6.0.14

FIX BUGS:
fix: remove strtolower for sql string (#16243)
fix: insert data send failed (#16147)
fix: TCP probe check alive update alive if pConn is null (#16069)
fix: subscribe all child tables skey calc error (#15947)

ver-3.0.0.0

NEW FEATURES / ENHANCEMENTS:
feat: support new SQL query syntax.
feat: add new meta-database for keeping all the metadata in the cluster.
feat: support event-driving stream computing.
feat: provide a whole new message queue for sub/pub time series data.
Feat: remove the restriction for several query syntax.
enh: provide the cloud-native architecture of TDengine.
enh: employ Raft protocol to ensure the consistency in distributed environment.
enh: utilize the B+tree to keep the meta-data in vnode.
enh: add invert index for the fast search of the tag data.
enh: improve the launch speed significantly.
enh: support keep 1 billion time series data in a cluster.
enh: provide a configurable cache to hold the latest data with various types.
enh: develop a new data transporter to between different nodes in the cluster.
enh: utilize the distributed hash table to locate the table to variable nodes in the cluster.
enh: support roll-up SMA for super table to down-sample the raw time series data.
enh: support time interval SMA to provide the approximate the time window aggregate result.
doc: provide an new user manual, including SQL syntax usage and cluster maintenance.

2.6.0.12

Release Notes

from：release/ver-2.6.0.10
to：release/ver-2.6.0.12

FIX BUGS:
feat: probe msg sendmsgtosever always return ok (#15700)
fix: first last and count combine aggregate is slower (#15500)
fix: remove excessive escaping of quotation marks with backslashes for schemaless insert in influxdb line protocol (#15463)
fix: fixed a free race condition (#15431)

2.6.0.10

Release Notes

from：release/ver-2.6.0.8
to：release/ver-2.6.0.10

FIX BUGS:
fix: check type of tVariant as a column/tag name when alter table... set tag with a number as key (#15086)
fix: resolve a potential nullptr dereferencing on extraRow with update=2 (#15143)
fix: gcc 12 compile error for 2.6 (#15062)
fix: database name which is a key word should not permitted (#14649)
fix: add Linx and Red Hat support (#14331)

ENHANCEMENTS:
added min_row & max_row functions (#14308)
change the default maxDbs of root acct to INT16_MAX (#14908)

2.6.0.8

Release Notes

from：release/ver-2.6.0.6
to：release/ver-2.6.0.8

FIX BUGS:
fix: fixed compilation errors produced by old gcc version (#14619)
fix: masters number in log.dnodes_info (#14489)
fix: tsdb read merge block and memory condition check is not right (#14395)
fix: fix a typo(#14387)
fix: resolve arithmetic issues of first/last/last_row with keepColumnName enabled (#14365)
fix: filter condition filterRmUnitRange can not reset unitIdx (#14372)
fix: percentile second scan not call cause crash (#14326)
fix: add error code TSDB_CODE_TSC_TOO_MANY_SML_LINES (#14280)
fix: fixed activation info error (#814)

2.6.0.6

Release Notes

from：release/ver-2.6.0.4
to：release/ver-2.6.0.6

FIX BUGS:
fix: multi group by calc key error (#14052)
fix: offset optimization order by desc calc skip block error(#14027)
fix: Remove install warning for red hat (#14019)
fix: added upstream check to avoid crash (#13894)
fix: fixed group by col_proj_function des error on client (#13821)
fix: taosdump incorrect count when dump in (#13815)
fix: super table info not removed after dropped by another client (#13666)
fix: fixed related query error caused by tag mismatch (#13308)

ENHANCEMENTS:
enh:change master/slave to leader/follower (#14190)
feat: added bitwise operations (#13306)
feat: support case sensitive and CN names of db, stable, column, tags and so on (#13866)