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system-variables: improve noop functions warning #6374

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Sep 9, 2021
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system-variables: improve noop functions warning #6374

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system-variables: improve noop functions warning
morgo Sep 2, 2021
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Update system-variables.md
morgo Sep 8, 2021
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4 changes: 2 additions & 2 deletions system-variables.md
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Expand Up @@ -596,9 +596,9 @@ Constraint checking is always performed in place for pessimistic transactions (d
* `START TRANSACTION READ ONLY` and `SET TRANSACTION READ ONLY` syntax
* The `tx_read_only`, `transaction_read_only`, `offline_mode`, `super_read_only` and `read_only` system variables

> **Note:**
> **Warning:**
>
> Only the default value of `OFF` can be considered safe. Setting `tidb_enable_noop_functions=1` might lead to unexpected behaviors in your application, because it permits TiDB to ignore certain syntax without providing an error.
> Only the default value of `OFF` can be considered safe. Setting `tidb_enable_noop_functions=1` might lead to unexpected behaviors in your application, because it permits TiDB to ignore certain syntax without providing an error. For example, the syntax `START TRANSACTION READ ONLY` will be permitted, but transactions will remain in read-write mode.
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### tidb_enable_parallel_apply <span class="version-mark">New in v5.0</span>

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