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4.8 KiB
4.8 KiB
ClickHouse release v20.5.2.7-stable FIXME as compared to v20.5.1.3833-prestable
New Feature
Improvement
- Add number of errors to ignore while choosing replicas (
distributed_replica_error_ignore
). #11669 (Azat Khuzhin). - Multiversion metadata for storages without structure locks. #11745 (alesapin).
- Slightly relax the validation of ODBC connection string. If the hostname or username contains only word characters along with
.
and-
, don't put it into curly braces. It is needed, because some ODBC drivers (e.g. PostgreSQL) don't understand when hostname is enclosed in curly braces. #11845 (Alexey Milovidov). - Support
SIGNED
andUNSIGNED
modifiers of standard integer types (BIGINT
,INT
, ...) for compatibility with MySQL. #11858 (Alexander Tokmakov). - Allow to use
sumWithOverflow
asSimpleAggregateFunction
. Closes #8053. #11865 (Alexander Kuzmenkov). - Add FixedString support in Hashing functions. #11878 (flynn).
Bug Fix
- Fix unexpected behaviour of queries like
SELECT *, xyz.*
which were success while an error expected. #11753 (hexiaoting). - Fix wrong result for
if()
with NULLs in condition. #11807 (Artem Zuikov). - Fix memory accounting via HTTP interface (can be significant with
wait_end_of_query=1
). #11840 (Azat Khuzhin). - Fix rare crash caused by using
Nullable
column in prewhere condition. Continuation of #11608. #11869 (Nikolai Kochetov). - Backported in #11965: Fix potential floating point exception when parsing DateTime64. This fixes #11374. #11875 (Alexey Milovidov).
- Fix potential floating point exception when parsing DateTime64. This fixes #11374. #11875 (Alexey Milovidov).
- Backported in #11963: Use the correct current database for checking access rights after statement
USE database
. #11920 (Vitaly Baranov). - Backported in #12059: Fix incorrect comparison of tuples with
Nullable
columns. Fixes #11985. #12039 (Nikolai Kochetov).
Build/Testing/Packaging Improvement
- Add simple GitHub hook script for the serverless environment. #11605 (alesapin).
- Send logs to client on fatal errors if possible. This will make test results more readable. #11826 (Alexey Milovidov).
- Allow ClickHouse to run on Android. #11894 (Alexey Milovidov).