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