TiFlash v5.2.3

FIX exception: GC removed normal file which just created (#3216) (#3228)

TiFlash v5.2.2

Bug Fixes

• Fix the issue that TiFlash fails to start up under platform without library nsl

TiFlash v5.1.3

There is no release note for this version.

TiFlash v5.1.2

Improvements

• Support the DATE() function
• Add write throughput per instance to Grafana panels
• Optimize the performance of the leader-read process
• Accelerate the process of canceling MPP tasks

Bug Fixes

• Fix the issue of unexpected results when TiFlash fails to establish MPP connections
• Fix the potential issue of data inconsistency that occurs when TiFlash is deployed on multiple disks
• Fix a bug that MPP queries get wrong results when TiFlash server is under high load
• Fix a potential bug that MPP queries hang forever
• Fix the issue of concurrency problem between store initialization and DDL
• Fix a bug of incorrect results that occurs when queries contain filters like CONSTANT < | <= | > | >= COLUMN
• Fix the potential panic issue when Snapshot is applied simultaneously with with multiple DDL operations
• Fix the issue that the store size in metrics is inaccurate under heavy writing
• Fix the potential issue that TiFlash cannot perform GC for the delta data after running for a long time
• Fix the issue of wrong results when new collation is enabled
• Fix the potential panic issue that occurs during lock resolving
• Fix a bug that metrics display wrong value

TiFlash v4.0.15

Bug fixes

• Fix the potential issue of data inconsistency that occurs when TiFlash is deployed on multiple disks
• Fix a bug of incorrect results that occurs when queries contain filters like CONSTANT < | <= | > | >= COLUMN
• Fix the issue that the store size in metrics is inaccurate under heavy writing
• Fix a potential bug that TiFlash cannot restore data when deployed on multiple disks
• Fix the potential issue that TiFlash cannot garbage-collect the delta data after running for a long time

TiFlash v5.0.5

There is no release note for this version.

TiFlash v5.0.4

Improvements

• Support casting the STRING type to the DOUBLE type
• Support the STR_TO_DATE() function
• Optimize the non-joined data in right outer join using multiple threads
• Support the Cartesian join
• Support the LEFT() and RIGHT() functions
• Support automatically invalidating stale Regions in MPP queries
• Support the ABS() function

Bug Fixes

• Fix the issue that TiFlash keeps restarting because of the split failure
• Fix the potential issue that TiFlash cannot delete the delta data
• Fix a bug that TiFlash adds wrong padding for non-binary characters in the CAST function
• Fix the issue of incorrect results when handling aggregation queries with complex GROUP BY columns
• Fix the TiFlash panic issue that occurs under heavy write pressure
• Fix the panic that occurs when the right jon key is not nullalbe and the left join key is nullable
• Fix the potential issue that the read-index requests take a long time
• Fix the panic issue that occurs when the read load is heavy
• Fix the panic issue that might occur when the Date_Format function is called with the STRING type argument and NULL values

TiFlash v5.2.1

Improvements

• Add operators: MOD / %, LIKE
• Add string functions: ASCII(), COALESCE(), LENGTH(), POSITION(), TRIM()
• Add mathematical functions: CONV(), CRC32(), DEGREES(), EXP(), LN(), LOG(), LOG10(), LOG2(), POW(), RADIANS(), ROUND(decimal), SIN(), MOD()
• Add date functions: ADDDATE(string, real), DATE_ADD(string, real), DATE()
• Add other functions: INET_NTOA(), INET_ATON(), INET6_ATON, INET6_NTOA()
• Support Shuffled Hash Join calculation and Shuffled Hash Aggregation calculation in the MPP mode when a new collation is enabled
• Optimize basic code to improve MPP performance
• Support casting the STRING type to the DOUBLE type
• Optimize the non-joined data in right outer join using multiple threads
• Support automatically invalidating stale Regions in MPP queries

Bug Fixes

• Fix the issue that TiFlash keeps restarting because of the split failure
• Fix the potential issue that TiFlash cannot delete the delta data
• Fix a bug that TiFlash adds wrong padding for non-binary characters in the CAST function
• Fix the issue of incorrect results when handling aggregation queries with complex GROUP BY columns
• Fix the TiFlash panic issue that occurs under heavy write pressure
• Fix the panic that occurs when the right jon key is not nullable and the left join key is nullable
• Fix the potential issue that the read-index requests take a long time
• Fix the panic issue that occurs when the read load is heavy
• Fix the panic issue that might occur when the Date_Format function is called with the STRING type argument and NULL values

TiFlash v5.2.0

Improvements

• Add operators: MOD / %, LIKE
• Add string functions: ASCII(), COALESCE(), LENGTH(), POSITION(), TRIM()
• Add mathematical functions: CONV(), CRC32(), DEGREES(), EXP(), LN(), LOG(), LOG10(), LOG2(), POW(), RADIANS(), ROUND(decimal), SIN(), MOD()
• Add date functions: ADDDATE(string, real), DATE_ADD(string, real), DATE()
• Add other functions: INET_NTOA(), INET_ATON(), INET6_ATON, INET6_NTOA()
• Support Shuffled Hash Join calculation and Shuffled Hash Aggregation calculation in the MPP mode when a new collation is enabled
• Optimize basic code to improve MPP performance
• Support casting the STRING type to the DOUBLE type
• Optimize the non-joined data in right outer join using multiple threads
• Support automatically invalidating stale Regions in MPP queries

Bug Fixes

• Fix the issue that TiFlash keeps restarting because of the split failure
• Fix the potential issue that TiFlash cannot delete the delta data
• Fix a bug that TiFlash adds wrong padding for non-binary characters in the CAST function
• Fix the issue of incorrect results when handling aggregation queries with complex GROUP BY columns
• Fix the TiFlash panic issue that occurs under heavy write pressure
• Fix the panic that occurs when the right jon key is not nullable and the left join key is nullable
• Fix the potential issue that the read-index requests take a long time
• Fix the panic issue that occurs when the read load is heavy
• Fix the panic issue that might occur when the Date_Format function is called with the STRING type argument and NULL values

TiFlash v5.1.1

Feature enhancements

• Support the HAVING() function in DAG requests

Bug fixes

• Fix the potential panic issue that occurs when running table scan tasks
• Fix a bug that TiFlash raises the error about duplicated region when handling DAQ requests
• Fix the panic issue that occurs when the read load is heavy
• Fix the potential panic issue that occurs when executing the DateFormat function
• Fix the potential memory leak issue that occurs when executing MPP tasks
• Fix the issue of unexpected results when executing the aggregation functions COUNT or COUNT DISTINCT
• Fix a potential bug that TiFlash cannot restore data when deployed on multiple disks
• Fix the issue that TiDB Dashboard cannot display the disk information of TiFlash correctly
• Fix the potential panic issue that occurs when deconstructing SharedQueryBlockInputStream
• Fix the potential panic issue that occurs when deconstructing MPPTask
• Fix the potential issue of data inconsistency after synchronizing data via snapshot