Behavior change and compatibility

Features

1. feat: taosX support OPC failover endpoint

Enhancements

1. enh: taosX allow sync from higher precision to lower eg. ns to ms
2. enh: Adapter support connection management and request limit
3. enh: improve performance for last_row + composite queries
4. enh: taosws taos_stmt_num_params support selects
5. enh: improve log and error code display during mnode startup
6. enh: refine document for error codes
7. enh: reduced CPU usage for stream when reading data
8. enh: speedup small queries in C/Rust websocket connection
9. enh: REST API response will use null for nan/inf instead of error
10. enh: no longer retry timed-out RPC messages
11. enh: improve performance for last_row + tags queries
12. enh: Improved query performance for virtual super tables
13. enh: Explorer Grid canvas suppot plotting with DECIMAL
14. enh: OpenTSDB data-in support timestamp/value field rename
15. enh: unify login-register process in enterprise & community
16. enh: add configuration parameter rpcRecvLogThreshold to set the threshold for warning logs in the rpc module
17. en: Explorer Dashboard node table now is sortable

Fixes

1. fix: tmq_get_json_meta behaves unexpectedly when the tags of subscribed meta messages contain empty strings.
2. fix: decode overflow interior page returns wrong pgno
3. fix: free() invalid pointer in taos-connector-rust
4. fix: the retention task does not exit when drop and recreate database with the same name while RSMA exists
5. fix: clearing user_ip in taos_options_connection does not take effect
6. fix: slow leader election when a single node in a dual-replica setup loses network connectivity
7. fix: crash occurred when querying a virtual supertable without including the timestamp primary key
8. fix: fixed the rare issue of inconsistent config parameter values across dnodes after modifying dnode parameters.
9. fix: incorrect result issue when the stream statement contains tag=%%1.
10. fix: state window fails to properly handle data with NULL states
11. fix: crash when concurrent writes and last queries are performed simultaneously.
12. fix: new values cannot be immediately queried after updating server configuration parameters
13. fix: fix C WebSocket stmt2 automatic reconnection
14. fix: subscription failure when the WAL version number exceeds the maximum value of int32
15. fix: startup failure on CPUs with 200 cores or more
16. fix: explorer query NaN as null
17. fix: show create table command execute error when the tag value is an empty string
18. fix: crash caused by memory cleanup when sync message sending fails
19. fix: incorrect _wduration result in time window queries with sliding.
20. fix: invalid sttblockreader initialization actions in window queries.
21. fix: resolved incorrect end_point information in perf_connections

What's Changed

• enh: optimize stable event window plan by @dapan1121 in https://github.com/taosdata/TDengine/pull/33195
• fix: TD-38212 by @cadem in https://github.com/taosdata/TDengine/pull/33186
• docs: update release note for 3.3.8.1 in office web by @feici02 in https://github.com/taosdata/TDengine/pull/33216
• fix: type conversion error by @menshibin in https://github.com/taosdata/TDengine/pull/32844
• feat: complete version number character copying by @menshibin in https://github.com/taosdata/TDengine/pull/33206
• docs: update python ws version history by @qevolg in https://github.com/taosdata/TDengine/pull/33222
• fix: fix tdgpt timemoe model directory by @SallyHuo-TAOS in https://github.com/taosdata/TDengine/pull/33213
• enh(last): enable reading cache when select last and tags by @Tony2h in https://github.com/taosdata/TDengine/pull/33204
• enh: TD-38163-mnode-open-log by @guanshengliang in https://github.com/taosdata/TDengine/pull/33160
• fix: clearing user_ip in taos_options_connection does not take effect by @yihaoDeng in https://github.com/taosdata/TDengine/pull/33229
• fix: clearing user_ip in taos_options_connection does not take effect by @yihaoDeng in https://github.com/taosdata/TDengine/pull/33228
• enh: rsma docs and task monitor by @kailixu in https://github.com/taosdata/TDengine/pull/33219
• fix: TS-7219-handle-status-req-timeout by @cadem in https://github.com/taosdata/TDengine/pull/33210
• merge: from 3.3.6 to main branch by @guanshengliang in https://github.com/taosdata/TDengine/pull/33235
• fix: get stream tasks list crash issue by @dapan1121 in https://github.com/taosdata/TDengine/pull/33238
• feat: unique getBuildPath invoke and ignore .git branch name contain … by @SallyHuo-TAOS in https://github.com/taosdata/TDengine/pull/33233
• enh: TD-38278-print-error-code by @cadem in https://github.com/taosdata/TDengine/pull/33231
• enh(last): enable using cache when select last and composite key by @Tony2h in https://github.com/taosdata/TDengine/pull/33234
• Fix/test case/err desc main by @facetosea in https://github.com/taosdata/TDengine/pull/33246
• enh: add and apply trigger latency config by @dapan1121 in https://github.com/taosdata/TDengine/pull/33245
• fix(stream): fix memory leak in vtable data merge by @JinqingKuang in https://github.com/taosdata/TDengine/pull/33194
• enh(last): enable reading cache when select last and tags by @Tony2h in https://github.com/taosdata/TDengine/pull/33236
• Docs for error codes Prefix Categories by @DuanKuanJun in https://github.com/taosdata/TDengine/pull/33250
• merge: from 3.3.6 to main by @guanshengliang in https://github.com/taosdata/TDengine/pull/33255
• fix: TD-37490 ci case by @facetosea in https://github.com/taosdata/TDengine/pull/33187

Full Changelog: https://github.com/taosdata/TDengine/compare/ver-3.3.8.1...ver-3.3.8.4