# system.crash_log {#system-tables_crash_log} Contains information about stack traces for fatal errors. The table does not exist in the database by default, it is created only when fatal errors occur. Columns: - `event_date` ([Datetime](../../sql-reference/data-types/datetime.md)) — Date of the event. - `event_time` ([Datetime](../../sql-reference/data-types/datetime.md)) — Time of the event. - `timestamp_ns` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Timestamp of the event with nanoseconds. - `signal` ([Int32](../../sql-reference/data-types/int-uint.md)) — Signal number. - `thread_id` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Thread ID. - `query_id` ([String](../../sql-reference/data-types/string.md)) — Query ID. - `trace` ([Array](../../sql-reference/data-types/array.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — Stack trace at the moment of crash. Each element is a virtual memory address inside ClickHouse server process. - `trace_full` ([Array](../../sql-reference/data-types/array.md)([String](../../sql-reference/data-types/string.md))) — Stack trace at the moment of crash. Each element contains a called method inside ClickHouse server process. - `version` ([String](../../sql-reference/data-types/string.md)) — ClickHouse server version. - `revision` ([UInt32](../../sql-reference/data-types/int-uint.md)) — ClickHouse server revision. - `build_id` ([String](../../sql-reference/data-types/string.md)) — BuildID that is generated by compiler. **Example** Query: ``` sql SELECT * FROM system.crash_log ORDER BY event_time DESC LIMIT 1; ``` Result (not full): ``` text Row 1: ────── event_date: 2020-10-14 event_time: 2020-10-14 15:47:40 timestamp_ns: 1602679660271312710 signal: 11 thread_id: 23624 query_id: 428aab7c-8f5c-44e9-9607-d16b44467e69 trace: [188531193,...] trace_full: ['3. DB::(anonymous namespace)::FunctionFormatReadableTimeDelta::executeImpl(std::__1::vector >&, std::__1::vector > const&, unsigned long, unsigned long) const @ 0xb3cc1f9 in /home/username/work/ClickHouse/build/programs/clickhouse',...] version: ClickHouse 20.11.1.1 revision: 54442 build_id: ``` **See also** - [trace_log](../../operations/system-tables/trace_log.md) system table [Original article](https://clickhouse.com/docs/en/operations/system-tables/crash-log)