2022-08-26 19:07:59 +00:00
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---
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slug: /zh/operations/system-tables/distributed_ddl_queue
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---
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2021-10-27 01:48:35 +00:00
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# system.distributed_ddl_queue {#system_tables-distributed_ddl_queue}
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包含有关在集群上执行的[分布式ddl查询(集群环境)](../../sql-reference/distributed-ddl.md)的信息.
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列信息:
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- `entry` ([String](../../sql-reference/data-types/string.md)) — 查询ID.
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- `host_name` ([String](../../sql-reference/data-types/string.md)) — 主机名称.
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- `host_address` ([String](../../sql-reference/data-types/string.md)) — 主机名解析到的IP地址.
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- `port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — 主机端口.
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- `status` ([Enum8](../../sql-reference/data-types/enum.md)) — 查询状态.
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- `cluster` ([String](../../sql-reference/data-types/string.md)) — 群集名称.
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- `query` ([String](../../sql-reference/data-types/string.md)) — 执行查询.
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- `initiator` ([String](../../sql-reference/data-types/string.md)) — 执行查询的节点.
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- `query_start_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — 查询开始时间.
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- `query_finish_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — 查询结束时间.
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- `query_duration_ms` ([UInt64](../../sql-reference/data-types/int-uint.md)) — 查询执行时间(毫秒).
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- `exception_code` ([Enum8](../../sql-reference/data-types/enum.md)) — 来自于[ZooKeeper](../../operations/tips.md#zookeeper)的异常代码.
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**示例**
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``` sql
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SELECT *
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FROM system.distributed_ddl_queue
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WHERE cluster = 'test_cluster'
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LIMIT 2
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FORMAT Vertical
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Query id: f544e72a-6641-43f1-836b-24baa1c9632a
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Row 1:
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──────
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entry: query-0000000000
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host_name: clickhouse01
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host_address: 172.23.0.11
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port: 9000
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status: Finished
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cluster: test_cluster
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query: CREATE DATABASE test_db UUID '4a82697e-c85e-4e5b-a01e-a36f2a758456' ON CLUSTER test_cluster
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initiator: clickhouse01:9000
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query_start_time: 2020-12-30 13:07:51
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query_finish_time: 2020-12-30 13:07:51
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query_duration_ms: 6
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exception_code: ZOK
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Row 2:
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──────
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entry: query-0000000000
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host_name: clickhouse02
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host_address: 172.23.0.12
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port: 9000
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status: Finished
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cluster: test_cluster
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query: CREATE DATABASE test_db UUID '4a82697e-c85e-4e5b-a01e-a36f2a758456' ON CLUSTER test_cluster
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initiator: clickhouse01:9000
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query_start_time: 2020-12-30 13:07:51
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query_finish_time: 2020-12-30 13:07:51
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query_duration_ms: 6
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exception_code: ZOK
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2 rows in set. Elapsed: 0.025 sec.
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```
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