system.query_log
Introduced or updated: v1.2.696
A read-only in-memory table stores all the query logs. For the specific fields available in the query logs, refer to the Examples section.
Setting a Session Tag
You can optionally assign a tag to your session, making it easier to filter logs in the log table based on the assigned session tag. For example, the following assigns the tag eric
to the current session:
set session query_tag='eric';
We can then run a query and retrieve the log from the log table using the assigned tag:
show users;
select query_tag, query_text from system.query_log where query_tag='eric' limit 1;
In the returned result, you can find the record for the query, tagged as 'eric':
-[ RECORD 1 ]-----------------------------------
query_tag: eric
query_text: SHOW USERS
Examples
The system.query_log
table stores detailed logs of executed queries. Here's an example of what the log entry looks like:
SELECT * FROM system.query_log;
...
-[ RECORD 10 ]-----------------------------------
log_type: 2
log_type_name: Finish
handler_type: HTTPQuery
tenant_id: default
cluster_id: default
node_id: bwElPLZxWt0F8LOFAqsIL2
sql_user: root
sql_user_quota: UserQuota<cpu:0,mem:0,store:0>
sql_user_privileges: GRANT ALL ON *.*, ROLES: ["account_admin"]
query_id: 1957f343-564e-471f-b036-a10ff853357e
query_kind: Other
query_text: SHOW USERS
query_hash: 63c65a28ae257d780e93a8a627190775
query_parameterized_hash: 63c65a28ae257d780e93a8a627190775
event_date: 2025-04-27
event_time: 2025-04-27 16:59:31.681036
query_start_time: 2025-04-27 16:59:31.671825
query_duration_ms: 9
query_queued_duration_ms: 0
current_database: default
databases:
tables:
columns:
projections:
written_rows: 0
written_bytes: 0
join_spilled_rows: 0
join_spilled_bytes: 0
agg_spilled_rows: 0
agg_spilled_bytes: 0
group_by_spilled_rows: 0
group_by_spilled_bytes: 0
written_io_bytes: 0
written_io_bytes_cost_ms: 0
scan_rows: 1
scan_bytes: 164
scan_io_bytes: 0
scan_io_bytes_cost_ms: 0
scan_partitions: 0
total_partitions: 0
result_rows: 1
result_bytes: 146
cpu_usage: 8
memory_usage: 0
bytes_from_remote_disk: 0
bytes_from_local_disk: 0
bytes_from_memory: 0
client_info:
client_address: 192.168.65.1
user_agent: bendsql/0.24.1-f1f7de0
exception_code: 0
exception_text:
stack_trace:
server_version: v1.2.731-nightly-eb671da5e5(rust-1.88.0-nightly-2025-04-27T06:06:12.942159732Z)
query_tag: eric
session_settings: acquire_lock_timeout=30, aggregate_spilling_memory_ratio=60, auto_compaction_imperfect_blocks_threshold=25, auto_compaction_segments_limit=3, collation=utf8, compact_max_block_selection=10000, copy_dedup_full_path_by_default=0, cost_factor_aggregate_per_row=5, cost_factor_hash_table_per_row=10, cost_factor_network_per_row=50, create_query_flight_client_with_current_rt=1, data_retention_time_in_days=1, ddl_column_type_nullable=1, default_order_by_null=nulls_last, disable_join_reorder=0, disable_variant_check=0, dynamic_sample_time_budget_ms=0, efficiently_memory_group_by=0, enable_aggregating_index_scan=1, enable_analyze_histogram=0, enable_auto_fix_missing_bloom_index=0, enable_auto_vacuum=0, enable_block_stream_write=0, enable_bloom_runtime_filter=1, enable_cbo=1, enable_clickhouse_handler=0, enable_compact_after_multi_table_insert=0, enable_compact_after_write=1, enable_dio=1, enable_distributed_compact=0, enable_distributed_copy_into=1, enable_distributed_merge_into=1, enable_distributed_pruning=1, enable_distributed_recluster=0, enable_distributed_replace_into=0, enable_dphyp=1, enable_dst_hour_fix=0, enable_expand_roles=1, enable_experimental_aggregate_hashtable=1, enable_experimental_merge_into=1, enable_experimental_procedure=0, enable_experimental_queries_executor=0, enable_experimental_rbac_check=1, enable_geo_create_table=0, enable_hive_parquet_predict_pushdown=1, enable_last_snapshot_location_hint=1, enable_loser_tree_merge_sort=1, enable_materialized_cte=1, enable_merge_into_row_fetch=1, enable_new_copy_for_text_formats=1, enable_optimizer_trace=0, enable_parallel_multi_merge_sort=1, enable_parquet_page_index=1, enable_parquet_prewhere=0, enable_parquet_rowgroup_pruning=1, enable_planner_cache=1, enable_prune_cache=1, enable_prune_pipeline=1, enable_query_result_cache=0, enable_refresh_aggregating_index_after_write=1, enable_refresh_virtual_column_after_write=1, enable_replace_into_partitioning=1, enable_strict_datetime_parser=1, enable_table_lock=1, enforce_broadcast_join=0, enforce_shuffle_join=0, error_on_nondeterministic_update=1, external_server_connect_timeout_secs=10, external_server_request_batch_rows=65536, external_server_request_max_threads=256, external_server_request_retry_times=8, external_server_request_timeout_secs=180, flight_client_timeout=60, flight_connection_max_retry_times=0, flight_connection_retry_interval=1, force_aggregate_data_spill=0, force_join_data_spill=0, force_sort_data_spill=0, force_window_data_spill=0, format_null_as_str=1, geometry_output_format=GeoJSON, group_by_shuffle_mode=before_merge, group_by_two_level_threshold=20000, hide_options_in_show_create_table=1, hilbert_clustering_min_bytes=107374182400, hilbert_num_range_ids=1000, hilbert_sample_size_per_block=1000, hive_parquet_chunk_size=16384, http_handler_result_timeout_secs=60, idle_transaction_timeout_secs=14400, inlist_to_join_threshold=1024, input_read_buffer_size=4194304, join_spilling_buffer_threshold_per_proc_mb=512, join_spilling_memory_ratio=60, join_spilling_partition_bits=4, lazy_read_threshold=1000, load_file_metadata_expire_hours=24, max_block_size=65536, max_cte_recursive_depth=1000, max_execute_time_in_seconds=0, max_inlist_to_or=3, max_memory_usage=6574653440, max_push_down_limit=10000, max_query_memory_usage=0, max_result_rows=0, max_set_operator_count=18446744073709551615, max_spill_io_requests=48, max_storage_io_requests=48, max_threads=8, max_vacuum_temp_files_after_query=18446744073709551615, network_policy=, numeric_cast_option=rounding, optimizer_skip_list=, parquet_fast_read_bytes=16777216, parquet_max_block_size=8192, parse_datetime_ignore_remainder=1, persist_materialized_cte=0, prefer_broadcast_join=1, purge_duplicated_files_in_copy=0, query_flight_compression=LZ4, query_out_of_memory_behavior=throw, query_result_cache_allow_inconsistent=0, query_result_cache_max_bytes=1048576, query_result_cache_min_execute_secs=1, query_result_cache_ttl_secs=300, query_tag=eric, quoted_ident_case_sensitive=1, random_function_seed=0, recluster_block_size=1972396032, recluster_timeout_secs=43200, replace_into_bloom_pruning_max_column_number=4, replace_into_shuffle_strategy=0, sandbox_tenant=, script_max_steps=10000, short_sql_max_length=128, sort_spilling_batch_bytes=8388608, sort_spilling_memory_ratio=60, spilling_file_format=parquet, spilling_to_disk_vacuum_unknown_temp_dirs_limit=18446744073709551615, sql_dialect=PostgreSQL, statement_queue_ttl_in_seconds=15, statement_queued_timeout_in_seconds=0, storage_fetch_part_num=2, storage_io_max_page_bytes_for_read=524288, storage_io_min_bytes_for_seek=48, storage_read_buffer_size=1048576, stream_consume_batch_size_hint=0, table_lock_expire_secs=30, timezone=UTC, unquoted_ident_case_sensitive=0, use_parquet2=0, use_vacuum2_to_purge_transient_table_data=0, warehouse=, window_num_partitions=256, window_partition_sort_block_size=65536, window_partition_spilling_memory_ratio=60, window_partition_spilling_to_disk_bytes_limit=0, window_spill_unit_size_mb=256, scope: SESSION
extra:
has_profile: true
peek_memory_usage: {"bwElPLZxWt0F8LOFAqsIL2":576850}