TiDB 5.1.5 Release Notes
Release date: December 28, 2022
TiDB version: 5.1.5
Quick access: Quick start | Production deployment | Installation packages
Compatibility changes
PD
- Disable compiling swagger server by default #4932
Bug fixes
TiDB
- Fix the issue that the window function causes TiDB to panic instead of reporting an error #30326
- Fix the wrong result that occurs when enabling dynamic mode in partitioned tables for TiFlash #37254
- Fix wrong results of
GREATEST
andLEAST
when passing in unsignedBIGINT
arguments #30101 - Fix wrong results of deleting data of multiple tables using
left join
#31321 - Fix the issue that the result of
concat(ifnull(time(3)))
in TiDB is different from that in MySQL #29498 - Fix the issue that the SQL statements that contain
cast(integer as char) union string
return wrong results #29513 - Fix the issue that
INL_HASH_JOIN
might hang when used withLIMIT
#35638 - Fix the wrong
ANY_VALUE
result that occurs when a Region returns empty data #30923 - Fix wrong results of index join caused by an innerWorker panic #31494
- Fix the issue that a SQL operation is canceled when its JSON type column joins its
CHAR
type column #29401 - Fix the issue that the background HTTP service of TiDB might not exit successfully and makes the cluster in an abnormal state #30571
- Fix the issue that concurrent column type change causes inconsistency between the schema and the data #31048
- Fix the issue that
KILL TIDB
cannot take effect immediately on idle connections #24031 - Fix the bug that setting any session variable will make
tidb_snapshot
fail to work #35515 - Fix the issue that the Region cache is not cleaned up in time when the Region is merged #37141
- Fix the panic issue caused by the connection array race in the KV client #33773
- Fix the issue that when TiDB Binlog is enabled, executing the
ALTER SEQUENCE
statement might cause a wrong metadata version and cause Drainer to exit #36276 - Fix the bug that TiDB may panic when querying statement summary tables #35340
- Fix the issue that TiDB gets the wrong result when using TiFlash to scan tables with empty range although TiFlash does not support reading tables with empty range yet #33083
- Fix the issue that the
avg()
function returnsERROR 1105 (HY000): other error for mpp stream: Could not convert to the target type - -value is out of range.
when queried from TiFlash #29952 - Fix the issue that
ERROR 1105 (HY000): close of nil channel
is returned when usingHashJoinExec
#30289 - Fix the issue that TiKV and TiFlash return different results when querying logical operations #37258
- Fix the issue that the
EXECUTE
statement might throw an unexpected error in specific scenarios #37187 - Fix the planner wrong behaviors that occur when
tidb_opt_agg_push_down
andtidb_enforce_mpp
are enabled #34465 - Fix a bug that TiDB might send coprocessor requests when executing the
SHOW COLUMNS
statement #36496 - Add warnings for
lock tables
andunlock tables
when theenable-table-lock
flag is not enabled #28967 - Fix the issue that range partitions allow multiple
MAXVALUE
partitions #36329
TiKV
- Fix the issue of time parsing error that occurs when the
DATETIME
values contain a fraction andZ
#12739 - Fix a bug that replica reads might violate the linearizability #12109
- Fix a bug that Regions might be overlapped if Raftstore is busy #13160
- Fix the TiKV panic issue that occurs when applying snapshot is aborted #11618
- Fix a bug that TiKV might panic if it has been running for 2 years or more #11940
- Fix the panic issue that might occur when the source peer catches up logs by snapshot in the Region merge process #12663
- Fix the issue that TiKV panics when performing type conversion for an empty string #12673
- Fix a bug that stale messages cause TiKV to panic #12023
- Fix the panic issue that might occur when a peer is being split and destroyed at the same time #12825
- Fix the TiKV panic issue that occurs when the target peer is replaced with the peer that is destroyed without being initialized when merging a Region #12048
- Fix the issue that TiKV reports the
invalid store ID 0
error when using Follower Read #12478 - Fix the possible duplicate commit records in pessimistic transactions when async commit is enabled #12615
- Support configuring the
unreachable_backoff
item to avoid Raftstore broadcasting too many messages after one peer becomes unreachable #13054 - Fix the issue that successfully committed optimistic transactions may report the
Write Conflict
error when the network is poor #34066 - Fix the wrong expression of
Unified Read Pool CPU
in dashboard #13086
- Fix the issue of time parsing error that occurs when the
PD
- Fix the issue that a removed tombstone store appears again after the PD leader transfer #4941
- Fix the issue that scheduling cannot start immediately after the PD leader transfer #4769
- Fix the wrong status code of
not leader
#4797 - Fix the issue that PD cannot correctly handle dashboard proxy requests #5321
- Fix a bug of TSO fallback in some corner cases #4884
- Fix the issue that the TiFlash learner replica might not be created in specific scenarios #5401
- Fix the issue that the label distribution has residual labels in the metrics #4825
- Fix the issue that when there exists a Store with large capacity (2T for example), fully allocated small Stores cannot be detected, which results in no balance operator being generated #4805
- Fix the issue that schedulers do not work when
SchedulerMaxWaitingOperator
is set to1
#4946
TiFlash
- 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
toDECIMAL
#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
toDECIMAL
#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 callingjson_length
with empty string #2705 - Fix wrong decimal comparison results in corner cases #4512
- Fix
TiFlash_schema_error
reported whenNOT 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
- Fix incorrect
Tools