| 2025Q1 | - Virtual Tables
- Query Capabilities: support using constant values as JOIN primary keys; support for REGEXP, GREATEST, LEASTfunctions; support for conditional expressions in the CAST function; support for retrieving other column values from the row returned by a single-row selection function via the cols function; INTERP supports interpolation time ranges; performance improvements for down-sampling and GROUP BY tag queries.
- Storage Capabilities: support controlling the retention period of supertable time-series data via the KEEP parameter; STMT write performance improvements; support for reorganizing tdb files; support for dynamic adjustment of the dataDir parameter in multi-tiered storage; improved write performance for automatic table creation.
- Stream Processing: support using virtual tables in stream; support for window event notification mechanism; support for setting minimum duration limits for event windows and state windows; support for continue_window_close trigger mode; computational resource optimization; creation time optimization.
- Data Types: DECIMAL
- High Availability: accelerated downtime recovery; optimized client Failover mechanism; significantly improved data synchronization performance between clusters; support for viewing Vnode recovery progress via SQL.
- Stability: begin maintenance of the new stable version 3.3.6.x
- TDgpt: support integration with the Community Edition.
- JDBC: efficient writing.
- Ecosystem Tools: integration with Tableau; integration with Excel.
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| 2025Q2 | - Storage Capabilities: multi-tiered storage supports shared storage; support for data mounting; support for writing query results to supertables; support for encrypting user passwords using the SM4 algorithm; optimization of STMT2 behavior.
- Stream Processing: stream processing refactoring.
- Data Subscription: support for MQTT protocol; optimized data subscription offset update logic.
- Data Types: BLOB
- High Availability: improved performance for node recovery and replica changes; faster cluster downtime recovery; optimized power-off data recovery mechanism.
- Observability: support for more write performance monitoring metrics.
- Communication: support for IPv6.
- TDgpt: support for covariate analysis prediction; support for Amazon's Time Series Foundation Model.
- Ecosystem Tools: integration with FineBI.
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| 2025Q3 | - Query Capabilities: support for configuring state window start/end points; count windows allow specifying columns; PARTITION BY TAG supports string operations; support for all MySQL aggregation and conditional functions (newly added std, variance, stddev_samp, var_samp, group_concat, if, isnull, isnotnull, nvl, coalesce, nullif, ifnull functions); support for find_in_set, regexp_in_set, like_in_set functions; support for date function; improved concurrency for last queries; separation of data query and metadata query processing threads.
- Storage Capabilities: support for Rollup SMA; support for Timewise-Range SMA; support for scanning the integrity of time-series data files via the scan command; refactored state control mechanism for shared storage data migration; added show ssmigrate command to view shared storage migration progress; shared storage supports NAS; floating-point numbers support BSS encoding.
- Stream Processing: computational performance and resource efficiency optimization; support for notification filtering mechanism; support for identifying virtual table changes; support for operations on the state column within state windows; support for delete_output_table option.
- High Availability: adjusted execution logic of the BALANCE VGROUP LEADER command for more even distribution of VGroup Leaders.
- TDgpt: support for data imputation functionality.
- Communication: support for TLS certificate authentication transmission.
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| 2025Q4 | - Virtual Tables: support for inheritance mechanism; support for custom columns in child tables; virtual supertable query performance improvement; maximum number of virtual table columns increased to 65535.
- Query Capabilities: improved query performance for last_row + tags; improved query performance for last_row + composite key; improved efficiency for event window queries grouped by tbname; support for outputting the actual start/end times of the outermost two windows; fill(prev)supports filling with the previous non-NULL value.
- Storage Capabilities: support for update RSMA.
- Stream Processing: support for triggering by natural month; support for sub-event triggering; support for interpand percentile functions; further performance and stability improvements; optimized memory usage.
- Data Subscription: subscription updates immediately effective after modifying tag values.
- Security & Reliability: enhanced capabilities in identity authentication, access control, transmission security, storage security, security auditing, security functions, encryption algorithms, and code security.
- TDgpt: support for correlation analysis; support for foundational model fine-tuning; support for Pearson correlation coefficient calculation function.
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