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2.0 KiB
2.0 KiB
slug |
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/en/operations/system-tables/text_log |
text_log
Contains logging entries. The logging level which goes to this table can be limited to the text_log.level
server setting.
Columns:
event_date
(Date) — Date of the entry.event_time
(DateTime) — Time of the entry.event_time_microseconds
(DateTime) — Time of the entry with microseconds precision.microseconds
(UInt32) — Microseconds of the entry.thread_name
(String) — Name of the thread from which the logging was done.thread_id
(UInt64) — OS thread ID.level
(Enum8
) — 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'
.
query_id
(String) — ID of the query.logger_name
(LowCardinality(String)) — Name of the logger (i.e.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.
Example
SELECT * FROM system.text_log LIMIT 1 \G
Row 1:
──────
event_date: 2020-09-10
event_time: 2020-09-10 11:23:07
event_time_microseconds: 2020-09-10 11:23:07.871397
microseconds: 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