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40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
---
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slug: /en/operations/system-tables/errors
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---
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# errors
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Contains error codes with the number of times they have been triggered.
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Columns:
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- `name` ([String](../../sql-reference/data-types/string.md)) — name of the error (`errorCodeToName`).
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- `code` ([Int32](../../sql-reference/data-types/int-uint.md)) — code number of the error.
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- `value` ([UInt64](../../sql-reference/data-types/int-uint.md)) — the number of times this error has been happened.
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- `last_error_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — time when the last error happened.
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- `last_error_message` ([String](../../sql-reference/data-types/string.md)) — message for the last error.
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- `last_error_trace` ([Array(UInt64)](../../sql-reference/data-types/array.md)) — A [stack trace](https://en.wikipedia.org/wiki/Stack_trace) which represents a list of physical addresses where the called methods are stored.
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- `remote` ([UInt8](../../sql-reference/data-types/int-uint.md)) — remote exception (i.e. received during one of the distributed query).
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**Example**
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``` sql
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SELECT name, code, value
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FROM system.errors
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WHERE value > 0
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ORDER BY code ASC
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LIMIT 1
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┌─name─────────────┬─code─┬─value─┐
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│ CANNOT_OPEN_FILE │ 76 │ 1 │
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└──────────────────┴──────┴───────┘
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```
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``` sql
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WITH arrayMap(x -> demangle(addressToSymbol(x)), last_error_trace) AS all
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SELECT name, arrayStringConcat(all, '\n') AS res
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FROM system.errors
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LIMIT 1
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SETTINGS allow_introspection_functions=1\G
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```
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