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system variables: correct the description of tidb_allow_fallback_to_tikv #6868

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Nov 23, 2021
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system variables: correct the description of tidb_allow_fallback_to_tikv #6868

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system variables: correct the description of tidb_allow_fallback_to_tikv
en-jin19 Nov 18, 2021
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Update system-variables.md
en-jin19 Nov 18, 2021
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2 changes: 1 addition & 1 deletion system-variables.md
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Expand Up @@ -406,7 +406,7 @@ This variable is an alias for `last_insert_id`.

- Scope: SESSION | GLOBAL
- Default value: ""
- This variable is used to specify a list of storage engines that might fall back to TiKV. If the execution of a SQL statement fails due to a failure of the specified storage engine in the list, TiDB retries executing this SQL statement with TiKV. This variable can be set to "" or "tiflash". When this variable is set to "tiflash", if the execution of a SQL statement fails due to a failure of TiFlash, TiDB retries executing this SQL statement with TiKV.
- This variable is used to specify a list of storage engines that might fall back to TiKV. If the execution of a SQL statement fails due to a failure of the specified storage engine in the list, TiDB retries executing this SQL statement with TiKV. This variable can be set to "" or "tiflash". When this variable is set to "tiflash", if TiFlash returns a timeout error (error codes: ErrTiFlashServerTimeout), TiDB retries executing this SQL statement with TiKV.

### tidb_allow_function_for_expression_index <span class="version-mark">New in v5.2.0</span>

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