system.text_log

Description

Contains logging entries. The logging level which goes to this table can be limited to the text_log.level server setting.

Columns

• hostname (LowCardinality(String)) — Hostname of the server executing the query.
• event_date (Date) — Date of the entry.
• event_time (DateTime) — Time of the entry.
• event_time_microseconds (DateTime64(6)) — Time of the entry with microseconds precision.
• thread_name (LowCardinality(String)) — Name of the thread from which the logging was done.
• thread_id (UInt64) — OS thread ID.
• level (Enum8(‘Fatal’ = 1, ‘Critical’ = 2, ‘Error’ = 3, ‘Warning’ = 4, ‘Notice’ = 5, ‘Information’ = 6, ‘Debug’ = 7, ‘Trace’ = 8, ‘Test’ = 9)) — Entry level. Possible values: 1 or ‘Fatal’, 2 or ‘Critical’, 3 or ‘Error’, 4 or ‘Warning’, 5 or ‘Notice’, 6 or ‘Information’, 7 or ‘Debug’, 8 or ‘Trace’, 9 or ‘Test’.
• query_id (String) — ID of the query.
• logger_name (LowCardinality(String)) — Name of the logger (e.g., DDLWorker).
• message (String) — The message itself.
• revision (UInt32) — ClickHouse revision.
• source_file (LowCardinality(String)) — Source file from which the logging was done.
• source_line (UInt64) — Source line from which the logging was done.
• message_format_string (LowCardinality(String)) — A format string that was used to format the message.
• value1 (String) — Argument 1 that was used to format the message.
• value2 (String) — Argument 2 that was used to format the message.
• value3 (String) — Argument 3 that was used to format the message.
• value4 (String) — Argument 4 that was used to format the message.
• value5 (String) — Argument 5 that was used to format the message.
• value6 (String) — Argument 6 that was used to format the message.
• value7 (String) — Argument 7 that was used to format the message.
• value8 (String) — Argument 8 that was used to format the message.
• value9 (String) — Argument 9 that was used to format the message.
• value10 (String) — Argument 10 that was used to format the message.

Example

SELECT * FROM system.text_log LIMIT 1 \G

Row 1:
──────
hostname:                clickhouse.eu-central1.internal
event_date:              2020-09-10
event_time:              2020-09-10 11:23:07
event_time_microseconds: 2020-09-10 11:23:07.871397
thread_name:             clickhouse-serv
thread_id:               564917
level:                   Information
query_id:
logger_name:             DNSCacheUpdater
message:                 Update period 15 seconds
revision:                54440
source_file:             /ClickHouse/src/Interpreters/DNSCacheUpdater.cpp; void DB::DNSCacheUpdater::start()
source_line:             45
message_format_string:   Update period {} seconds
value1:                  15
value2:                  
value3:                  
value4:                  
value5:                  
value6:                  
value7:                  
value8:                  
value9:                  
value10: