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Merge pull request #31128 from den-crane/patch-37

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Doc. freeze with name
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alesapin 2021-11-08 10:12:07 +03:00 committed by GitHub
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3
docs/en/sql-reference/statements/alter/partition.md
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@ -155,7 +155,7 @@ ALTER TABLE visits CLEAR COLUMN hour in PARTITION 201902
## FREEZE PARTITION {#alter_freeze-partition}
``` sql
ALTER TABLE table_name FREEZE [PARTITION partition_expr]
ALTER TABLE table_name FREEZE [PARTITION partition_expr] [WITH NAME 'backup_name']
```
This query creates a local backup of a specified partition. If the `PARTITION` clause is omitted, the query creates the backup of all partitions at once.
@ -169,6 +169,7 @@ At the time of execution, for a data snapshot, the query creates hardlinks to a
- `/var/lib/clickhouse/` is the working ClickHouse directory specified in the config.
- `N` is the incremental number of the backup.
- if the `WITH NAME` parameter is specified, then the value of the `'backup_name'` parameter is used instead of the incremental number.
!!! note "Note"
If you use [a set of disks for data storage in a table](../../../engines/table-engines/mergetree-family/mergetree.md#table_engine-mergetree-multiple-volumes), the `shadow/N` directory appears on every disk, storing data parts that matched by the `PARTITION` expression.

3
docs/ru/sql-reference/statements/alter/partition.md
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@ -165,7 +165,7 @@ ALTER TABLE table_name CLEAR INDEX index_name IN PARTITION partition_expr
## FREEZE PARTITION {#alter_freeze-partition}
``` sql
ALTER TABLE table_name FREEZE [PARTITION partition_expr]
ALTER TABLE table_name FREEZE [PARTITION partition_expr] [WITH NAME 'backup_name']
```
Создаёт резервную копию для заданной партиции. Если выражение `PARTITION` опущено, резервные копии будут созданы для всех партиций.
@ -179,6 +179,7 @@ ALTER TABLE table_name FREEZE [PARTITION partition_expr]
- `/var/lib/clickhouse/` — рабочая директория ClickHouse, заданная в конфигурационном файле;
- `N` — инкрементальный номер резервной копии.
- если задан параметр `WITH NAME`, то вместо инкрементального номера используется значение параметра `'backup_name'`.
!!! note "Примечание"
При использовании [нескольких дисков для хранения данных таблицы](../../statements/alter/index.md#table_engine-mergetree-multiple-volumes) директория `shadow/N` появляется на каждом из дисков, на которых были куски, попавшие под выражение `PARTITION`.