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21 | 21 |
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| 22 | +# Apache IoTDB 1.3.6 |
| 23 | + |
| 24 | +## Features & Improvements |
| 25 | +- Data Query: Optimized query performance for multiple scenarios, including the multi-series Last query. |
| 26 | +- Data Query: Added the FastLastQuery interface to the Java SDK, supporting more efficient Last query operations. |
| 27 | +- Data Query: Adjusted the tree-model fetchSchema to return data in segmented streaming mode, improving response speed in large-data-volume scenarios. |
| 28 | +- Storage Management: Optimized memory management to avoid memory leak risks and ensure long-term stable system operation. |
| 29 | +- Storage Management: Optimized the file compaction mechanism to enhance compaction efficiency and reduce system storage resource consumption. |
| 30 | +- Data Synchronization: Optimized Pipe SQL parameter configurations to support specifying asynchronous loading methods. |
| 31 | +- Data Synchronization: Added a syntactic sugar feature that automatically splits full-volume Pipe creation SQL into real-time synchronization and historical synchronization. |
| 32 | +- System Management: Added a global configuration item for data type compression methods, supporting on-demand adjustment of storage compression strategies. |
| 33 | +- Others: Fixed security vulnerabilities CVE-2025-12183,CVE-2025-66566 and CVE-2025-11226. |
| 34 | +- ... |
| 35 | + |
| 36 | +## Bugs |
| 37 | +- Fixed the issue where selecting discontinuous sequence files for the settle task from the sequence zone under device-level TTL would trigger an overlap error during execution. |
| 38 | +- Fixed the issue where running the pattern_match custom function in tree-model SQL (3C3D deployment) would throw an error indicating "tsDataType" is null. |
| 39 | +- Fixed the issue where TTL would continuously write data into the modification cache in fast compaction mode, resulting in slow compaction speed. |
| 40 | +- Fixed the stack overflow issue that occurred when performing value filter queries with a large number of devices without adding the align by device clause. |
| 41 | +- Fixed the issue where loading TsFiles with empty value chunks across time partitions would generate TsFiles with misaligned chunks. |
| 42 | +- Fixed the incorrect processing logic of TransformOperator for empty TsBlocks. |
| 43 | +- Fixed the issue where the number of server connections would keep increasing when using a user without MAINTAIN permission in a Session. |
| 44 | +- Fixed the issue where Load would ignore mods import under certain special circumstances (e.g., mismatched aligned types or inconsistent table schemas). |
| 45 | +- Fixed the issue where data that had been deleted would be resynchronized to the receiver if mod files existed when Pipe pattern was configured. |
| 46 | +- Fixed the issue where info logs related to TTL checks would still be printed during compaction scheduling even when TTL was not configured. |
| 47 | +- ... |
| 48 | + |
| 49 | +# Apache IoTDB 1.3.5 |
| 50 | + |
| 51 | +## Improvements |
| 52 | +- Storage Module: Optimize user password encryption by changing the algorithm to SHA-256 |
| 53 | +- ... |
| 54 | + |
| 55 | +## Bugs |
| 56 | +- Fixed the array out-of-bounds exception in cross-Region aggregate query with align by device |
| 57 | +- Fixed the error in aggregate queries with `order by time + align by device` for single or multiple devices spanning across Regions |
| 58 | +- Fixed the "out of memory" error in query with large TEXT objects + align by device + order by time |
| 59 | +- Fixed the issue where the last query with where time > X and time < X was not applied to partitioned table fetching, resulting in failure to hit PartitionCache |
| 60 | +- Fixed the error in using change_point function + align by device when single device data spans multiple Regions |
| 61 | +- Fixed the OOM (Out of Memory) issue caused by the asynchronous submission queue of pipeTransferFile |
| 62 | +- Fixed the memory leak issue in pipe password detection |
| 63 | +- For the pipe receiver and during Load, change the behavior of'clear schema cache' to 'update last cache' |
| 64 | +- Optimize the loading speed of TsFile when there are a large number of measuring points and the mods file contains deletions of a large number of measuring points |
| 65 | +- ... |
| 66 | + |
| 67 | +# Apache IoTDB 1.3.4-1 |
| 68 | + |
| 69 | +This is a bug-fix version of 1.3.4 |
| 70 | + |
| 71 | +- Fix the bug that will remove the data partition table by mistake in case of us/ns time precision and using ttl |
| 72 | + |
| 73 | +# Apache IoTDB 1.3.4 |
| 74 | + |
| 75 | +## Features & Improvements |
| 76 | + |
| 77 | +- Data Query: Users can now control the loading of JAR packages via URI for UDF, PipePlugin, Trigger, and AINode through configuration items. |
| 78 | +- Data Query: Added monitoring for TimeIndex cached during the merge process. |
| 79 | +- System Management: Expanded UDF functions with the addition of the pattern_match function for pattern matching. |
| 80 | +- System Management:The Python session SDK now includes a parameter for connection timeout. |
| 81 | +- System Management:Introduced authorization for cluster management-related operations. |
| 82 | +- System Management:ConfigNode/DataNode now supports scaling down using SQL. |
| 83 | +- System Management:ConfigNode automatically cleans up partition information exceeding the TTL (cleans up every 2 hours). |
| 84 | +- Data Synchronization: Supports specifying authorization information for the receiver on the sender's end. |
| 85 | +- Ecosystem Integration: Supports Kubernetes Operator. |
| 86 | +- Scripts and Tools: The import-data/export-data scripts have been expanded to support new data types (strings, large binary objects, dates, timestamps). |
| 87 | +- Scripts and Tools:The import-data/export-data scripts have been iterated to support importing and exporting data in three formats: TsFile, CSV, and SQL. |
| 88 | + ... |
| 89 | + |
22 | 90 | # Apache IoTDB 1.3.3 |
23 | 91 |
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24 | 92 | ## Features & Improvements |
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