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distributed_ddl_queue

包含有关在集群上执行的分布式DDL查询(ON CLUSTER子句)的信息。

示例

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.