TiFlash v6.5.2

For new features, improvements, and bug fixes released in 6.5.2 for tiflash, see TiDB 6.5.2 release notes.

TiFlash v6.1.6

For new features, improvements, and bug fixes released in 6.1.6 for tiflash, see TiDB 6.1.6 release notes.

TiFlash v7.0.0

For new features, improvements, and bug fixes released in 7.0.0 for tiflash, see TiDB 7.0.0 release notes.

TiFlash v6.5.1

Improvements

• Accelerate TiFlash startup greatly when the data volume is large #6395 @hehechen

Bug fixes

• Fix the issue that semi-joins use excessive memory when calculating Cartesian products #6730 @gengliqi
• Fix the issue that TiFlash log search is too slow #6829 @hehechen
• Fix the issue that TiFlash cannot start because files are mistakenly deleted after repeated restarts #6486 @JaySon-Huang
• Fix the issue that TiFlash might report an error when performing a query after adding a new column #6726 @JaySon-Huang
• Fix the issue that TiFlash does not support IPv6 configuration #6734 @ywqzzy

TiFlash v6.6.0

Improvements

• Support an independent MVCC bitmap filter that decouples the MVCC filtering operations in the TiFlash data scanning process, which provides the foundation for future optimization of the data scanning process #6296 @JinheLin
• Reduce the memory usage of TiFlash by up to 30% when there is no query #6589 @hongyunyan

Bug fixes

• Fix the issue that querying TiFlash-related system tables might get stuck #6745 @lidezhu
• Fix the issue that semi-joins use excessive memory when calculating Cartesian products #6730 @gengliqi
• Fix the issue that the result of the division operation on the DECIMAL data type is not rounded #6393 @LittleFall

TiFlash v6.1.5

There is no release note for this version.

TiFlash v6.1.4

Bug fixes

• Fix the issue that TiFlash global locks are blocked for a long time occasionally #6418 @SeaRise
• Fix the issue that high throughput writes cause OOM #6407 @JaySon-Huang

TiFlash v6.5.0

For new features, improvements, and bug fixes released in 6.5.0 for TiFlash, see TiDB 6.5.0 release notes.

TiFlash v5.1.5

Bug fixes

• Fix incorrect microsecond when casting string to datetime #3556
• Fix the panic issue that occurs when TLS is enabled #4196
• Fix a bug that TiFlash might crash due to an error in parallel aggregation #5356
• Fix the issue that a query containing JOIN might be hung if an error occurs #4195
• Fix the issue that the function OR returns wrong results #5849
• Fix the bug that invalid storage directory configurations lead to unexpected behaviors #4093
• Fix potential data inconsistency after a lot of INSERT and DELETE operations #4956
• Fix a bug that data not matching any region range remains on a TiFlash node #4414
• Fix the potential query error after adding columns under heavy read workload #3967
• Fix repeated crashes caused by the commit state jump backward errors #2576
• Fix potential errors when querying on a table with many delete operations #4747
• Fix the issue that the date format identifies '' as an invalid separator #4036
• Fix the wrong result that occurs when casting DATETIME to DECIMAL #4151
• Fix the bug that some exceptions are not handled properly #4101
• Fix the issue that Prepare Merge might damage the metadata of the raft store and cause TiFlash to restart #3435
• Fix a bug that an MPP query might fail due to random gRPC keepalive timeout #4662
• Fix the issue that the result of IN is incorrect in multi-value expressions #4016
• Fix a bug that MPP tasks might leak threads forever #4238
• Fix the issue that expired data is recycled slowly #4146
• Fix the overflow that occurs when casting FLOAT to DECIMAL #3998
• Fix the issue that logical operators return wrong results when the argument type is UInt8 #6127
• Fix the potential index out of bounds error if calling json_length with empty string #2705
• Fix wrong decimal comparison results in corner cases #4512
• Fix TiFlash_schema_error reported when NOT NULL columns are added #4596
• Fix the issue that TiFlash bootstrap fails when 0.0 is used as the default value for integers, for example, `i` int(11) NOT NULL DEFAULT '0.0' #3157

TiFlash v6.1.3

Bug fixes

• Fix the issue that logical operators return wrong results when the argument type is UInt8 #6127
• Fix the issue that wrong data input for CAST(value AS DATETIME) causing high TiFlash sys CPU #5097 @xzhangxian1008
• Fix the issue that heavy write pressure might generate too many column files in the delta layer #6361 @lidezhu
• Fix the issue that column files in the delta layer cannot be compacted after restarting TiFlash #6159 @lidezhu