mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 11:32:03 +00:00
71 lines
3.4 KiB
Markdown
71 lines
3.4 KiB
Markdown
|
# system.replicated_fetches {#system_tables-replicated_fetches}
|
||
|
|
|
||
|
|
Contains information about currently running background fetches.
|
||
|
|
|
||
|
|
Columns:
|
||
|
|
|
||
|
|
- `database` ([String](../../sql-reference/data-types/string.md)) — Name of the database.
|
||
|
|
|
||
|
|
- `table` ([String](../../sql-reference/data-types/string.md)) — Name of the table.
|
||
|
|
|
||
|
|
- `elapsed` ([Float64](../../sql-reference/data-types/float.md)) — The time elapsed (in seconds) since showing currently running background fetches started.
|
||
|
|
|
||
|
|
- `progress` ([Float64](../../sql-reference/data-types/float.md)) — The percentage of completed work from 0 to 1.
|
||
|
|
|
||
|
|
- `result_part_name` ([String](../../sql-reference/data-types/string.md)) — The name of the part that will be formed as the result of showing currently running background fetches.
|
||
|
|
|
||
|
|
- `result_part_path` ([String](../../sql-reference/data-types/string.md)) — Absolute path to the part that will be formed as the result of showing currently running background fetches.
|
||
|
|
|
||
|
|
- `partition_id` ([String](../../sql-reference/data-types/string.md)) — ID of the partition.
|
||
|
|
|
||
|
|
- `total_size_bytes_compressed` ([UInt64](../../sql-reference/data-types/int-uint.md)) — The total size (in bytes) of the compressed data in the result part.
|
||
|
|
|
||
|
|
- `bytes_read_compressed` ([UInt64](../../sql-reference/data-types/int-uint.md)) — The number of compressed bytes read from the result part.
|
||
|
|
|
||
|
|
- `source_replica_path` ([String](../../sql-reference/data-types/string.md)) — Absolute path to the source replica.
|
||
|
|
|
||
|
|
- `source_replica_hostname` ([String](../../sql-reference/data-types/string.md)) — Hostname of the source replica.
|
||
|
|
|
||
|
|
- `source_replica_port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — Port number of the source replica.
|
||
|
|
|
||
|
|
- `interserver_scheme` ([String](../../sql-reference/data-types/string.md)) — Name of the interserver scheme.
|
||
|
|
|
||
|
|
- `URI` ([String](../../sql-reference/data-types/string.md)) — Uniform resource identifier.
|
||
|
|
|
||
|
|
- `to_detached` ([UInt8](../../sql-reference/data-types/int-uint.md)) — The flag indicates whether the currently running background fetch is being performed using the `TO DETACHED` expression.
|
||
|
|
|
||
|
|
- `thread_id` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Thread identifier.
|
||
|
|
|
||
|
|
**Example**
|
||
|
|
|
||
|
|
``` sql
|
||
|
|
SELECT * FROM system.replicated_fetches LIMIT 1 FORMAT Vertical;
|
||
|
|
```
|
||
|
|
|
||
|
|
``` text
|
||
|
|
Row 1:
|
||
|
|
──────
|
||
|
|
database: default
|
||
|
|
table: t
|
||
|
|
elapsed: 7.243039876
|
||
|
|
progress: 0.41832135995612835
|
||
|
|
result_part_name: all_0_0_0
|
||
|
|
result_part_path: /var/lib/clickhouse/store/700/70080a04-b2de-4adf-9fa5-9ea210e81766/all_0_0_0/
|
||
|
|
partition_id: all
|
||
|
|
total_size_bytes_compressed: 1052783726
|
||
|
|
bytes_read_compressed: 440401920
|
||
|
|
source_replica_path: /clickhouse/test/t/replicas/1
|
||
|
|
source_replica_hostname: node1
|
||
|
|
source_replica_port: 9009
|
||
|
|
interserver_scheme: http
|
||
|
|
URI: http://node1:9009/?endpoint=DataPartsExchange%3A%2Fclickhouse%2Ftest%2Ft%2Freplicas%2F1&part=all_0_0_0&client_protocol_version=4&compress=false
|
||
|
|
to_detached: 0
|
||
|
|
thread_id: 54
|
||
|
|
```
|
||
|
|
|
||
|
|
**See Also**
|
||
|
|
|
||
|
|
- [Managing ReplicatedMergeTree Tables](../../sql-reference/statements/system/#query-language-system-replicated)
|
||
|
|
|
||
|
|
[Original article](https://clickhouse.tech/docs/en/operations/system_tables/replicated_fetches) <!--hide-->
|