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ClickHouse/docs/en/operations/system-tables/text_log.md
Ivan Blinkov 7170f3c534
[docs] split aggregate function and system table references (#11742) 
* prefer relative links from root

* wip

* split aggregate function reference

* split system tables
2020-06-18 11:24:31 +03:00

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system.text_log

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

Columns:

  • event_date (Date) — Date of the entry.
  • event_time (DateTime) — Time of the entry.
  • 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.