mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-01 20:12:02 +00:00
5d6a2609c8
* Updated doc of distributed_ddl_queue * Update docs/en/operations/system-tables/distributed_ddl_queue.md Co-authored-by: Alexander Tokmakov <tavplubix@gmail.com> * Update docs/en/operations/system-tables/distributed_ddl_queue.md Co-authored-by: Alexander Tokmakov <tavplubix@gmail.com> * Update docs/en/operations/system-tables/distributed_ddl_queue.md Co-authored-by: Alexander Tokmakov <tavplubix@gmail.com> --------- Co-authored-by: Alexander Tokmakov <tavplubix@gmail.com>
76 lines
3.1 KiB
Markdown
76 lines
3.1 KiB
Markdown
---
|
|
slug: /en/operations/system-tables/distributed_ddl_queue
|
|
---
|
|
# distributed_ddl_queue
|
|
|
|
Contains information about [distributed ddl queries (ON CLUSTER clause)](../../sql-reference/distributed-ddl.md) that were executed on a cluster.
|
|
|
|
Columns:
|
|
|
|
- `entry` ([String](../../sql-reference/data-types/string.md)) — Query id.
|
|
- `entry_version` ([Nullable(UInt8)](../../sql-reference/data-types/int-uint.md)) - Version of the entry
|
|
- `initiator_host` ([Nullable(String)](../../sql-reference/data-types/string.md)) - Host that initiated the DDL operation
|
|
- `initiator_port` ([Nullable(UInt16)](../../sql-reference/data-types/int-uint.md)) - Port used by the initiator
|
|
- `cluster` ([String](../../sql-reference/data-types/string.md)) — Cluster name.
|
|
- `query` ([String](../../sql-reference/data-types/string.md)) — Query executed.
|
|
- `settings` ([Map(String, String)](../../sql-reference/data-types/map.md)) - Settings used in the DDL operation
|
|
- `query_create_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Query created time.
|
|
- `host` ([String](../../sql-reference/data-types/string.md)) — Hostname
|
|
- `port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — Host Port.
|
|
- `status` ([Enum8](../../sql-reference/data-types/enum.md)) — Status of the query.
|
|
- `exception_code` ([Enum8](../../sql-reference/data-types/enum.md)) — Exception code.
|
|
- `exception_text` ([Nullable(String)](../../sql-reference/data-types/string.md)) - Exception message
|
|
- `query_finish_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Query finish time.
|
|
- `query_duration_ms` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Duration of query execution (in milliseconds).
|
|
|
|
|
|
**Example**
|
|
|
|
``` sql
|
|
SELECT *
|
|
FROM system.distributed_ddl_queue
|
|
WHERE cluster = 'test_cluster'
|
|
LIMIT 2
|
|
FORMAT Vertical
|
|
|
|
Query id: f544e72a-6641-43f1-836b-24baa1c9632a
|
|
|
|
Row 1:
|
|
──────
|
|
entry: query-0000000000
|
|
entry_version: 5
|
|
initiator_host: clickhouse01
|
|
initiator_port: 9000
|
|
cluster: test_cluster
|
|
query: CREATE DATABASE test_db UUID '4a82697e-c85e-4e5b-a01e-a36f2a758456' ON CLUSTER test_cluster
|
|
settings: {'max_threads':'16','use_uncompressed_cache':'0'}
|
|
query_create_time: 2023-09-01 16:15:14
|
|
host: clickhouse-01
|
|
port: 9000
|
|
status: Finished
|
|
exception_code: 0
|
|
exception_text:
|
|
query_finish_time: 2023-09-01 16:15:14
|
|
query_duration_ms: 154
|
|
|
|
Row 2:
|
|
──────
|
|
entry: query-0000000001
|
|
entry_version: 5
|
|
initiator_host: clickhouse01
|
|
initiator_port: 9000
|
|
cluster: test_cluster
|
|
query: CREATE DATABASE test_db UUID '4a82697e-c85e-4e5b-a01e-a36f2a758456' ON CLUSTER test_cluster
|
|
settings: {'max_threads':'16','use_uncompressed_cache':'0'}
|
|
query_create_time: 2023-09-01 16:15:14
|
|
host: clickhouse-01
|
|
port: 9000
|
|
status: Finished
|
|
exception_code: 630
|
|
exception_text: Code: 630. DB::Exception: Cannot drop or rename test_db, because some tables depend on it:
|
|
query_finish_time: 2023-09-01 16:15:14
|
|
query_duration_ms: 154
|
|
|
|
2 rows in set. Elapsed: 0.025 sec.
|
|
```
|