thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-21 15:12:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update CHANGELOG.md

Browse Source
This commit is contained in:
alexey-milovidov 2021-12-12 02:54:06 +03:00 committed by GitHub
parent 3e8ef66f52
commit bf6e091fe0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
CHANGELOG.md
View File

@ -5,7 +5,7 @@
* *A fix for a feature that previously had unwanted behaviour.* Do not allow direct select for Kafka/RabbitMQ/FileLog. Can be enabled by setting `stream_like_engine_allow_direct_select`. Direct select will be not allowed even if enabled by setting, in case there is an attached materialized view. For Kafka and RabbitMQ direct selectm if allowed, will not commit massages by default. To enable commits with direct select, user must use storage level setting `kafka{rabbitmq}_commit_on_select=1` (default `0`). [#31053](https://github.com/ClickHouse/ClickHouse/pull/31053) ([Kseniia Sumarokova](https://github.com/kssenii)).
* *A slight change in behaviour of a new function.* Return unquoted string in JSON_VALUE. Closes [#27965](https://github.com/ClickHouse/ClickHouse/issues/27965). [#31008](https://github.com/ClickHouse/ClickHouse/pull/31008) ([Kseniia Sumarokova](https://github.com/kssenii)).
* *Setting rename.* Add custom null representation support for TSV/CSV input formats. Fix deserialing Nullable(String) in TSV/CSV/JSONCompactStringsEachRow/JSONStringsEachRow input formats. Rename `output_format_csv_null_representation` and `output_format_tsv_null_representation` to `format_csv_null_representation` and `format_tsv_null_representation` accordingly. [#30497](https://github.com/ClickHouse/ClickHouse/pull/30497) ([Kruglov Pavel](https://github.com/Avogar)).
* *Further deprecation of already unused code.* This is relevant only for users of ClickHouse versions 20.6 and older. A "leader election" mechanism is removed from `ReplicatedMergeTree`, because multiple leaders are supported since 20.6. If you are upgrading from an older version and some replica with an old version is a leader, then server will fail to start after upgrade. Stop replicas with old version to make new version start. After that it will not be possible to downgrade to version older than 20.6. [#32140](https://github.com/ClickHouse/ClickHouse/pull/32140) ([tavplubix](https://github.com/tavplubix)).
* *Further deprecation of already unused code.* This is relevant only for users of ClickHouse versions older than 20.6. A "leader election" mechanism is removed from `ReplicatedMergeTree`, because multiple leaders are supported since 20.6. If you are upgrading from an older version and some replica with an old version is a leader, then server will fail to start after upgrade. Stop replicas with old version to make new version start. After that it will not be possible to downgrade to version older than 20.6. [#32140](https://github.com/ClickHouse/ClickHouse/pull/32140) ([tavplubix](https://github.com/tavplubix)).
#### New Feature