IoTDB Files

Features & Improvements

• Data Query: Added new aggregate function count_if and scalar functions greatest / least to the table model.
• Data Query: Significantly improved the performance of full-table count(*) queries in the table model.
• AI Management: Added timestamps to the results returned by AINode.
• System Management: Optimized the performance of the table model's metadata module.
• System Management: Enabled the table model to actively listens and loads TsFile.
• System Management: Added support for TsBlock deserialization in the Python and Go client query interfaces.
• Ecosystem Integration: Expanded the table model's ecosystem to integrate with Spark.
• Scripts and Tools: The import-schema and export-schema scripts now support importing and exporting metadata for the table model.
• ...

Bugs

• Fixed the issue where a single write request exceeding the total size of the WAL queue caused write queries to hang.
• Fixed the issue where the receiver experienced OOM (Out of Memory) after resuming synchronization following a long period of inactivity.
• Fixed the issue where repeatedly setting TTL for DB and Table led to inserted data being unqueryable and returning an empty list.
• Fixed the issue where a regular user with create+insert permissions on a table encountered exceptions when loading tsfile.
• Fixed the issue where passwords were logged when SessionPool getSession timed out.
• Fixed the issue in the Go client tree model query interface where the absence of a check for the Time column led to an "index out of range [-1]" error when retrieving Time column data.
• Fixed the issue where distinct hits aggregate pushdown optimization and is used with group by date_bin, causing execution exceptions in aggregate queries.
• Fixed the issue of whitespace characters at the beginning and end of port and directory address parameters in the configuration file.
• Fixed the issue where setting the maximum number of concurrent RPC clients less than the number of CPU threads caused DN startup failure.
• Fixed the issue where using a template, after activation, writing to extended columns, and then creating a pipe, caused the series under the device to double.
• Fixed the issue where metadata synchronization, creating a pipe after a template, caused the series to double when using show timeseries.
• Fixed the issue where a regular user with INSERT permissions encountered exceptions when exporting metadata using export-schema.sh.
• ...

Full Changelog: https://github.com/apache/iotdb/compare/v2.0.2-1...v2.0.3