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[Docs] Clarify that async inserts are deduplicated by default

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Justin de Guzman 2024-02-23 02:18:04 -08:00 committed by GitHub
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docs/en/sql-reference/statements/insert-into.md
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@ -238,7 +238,7 @@ Performance will not decrease if:
### Asynchronous inserts
It is possible to asynchronously insert data in small but frequent inserts. The data from such insertions is combined into batches and then safely inserted into a table. To use asynchronous inserts, enable the [`async_insert`](../../operations/settings/settings.md#async-insert) setting. Note that asynchronous inserts are supported only over HTTP protocol and that deduplication is not supported for them.
It is possible to asynchronously insert data in small but frequent inserts. The data from such insertions is combined into batches and then safely inserted into a table. To use asynchronous inserts, enable the [`async_insert`](../../operations/settings/settings.md#async-insert) setting.
Using `async_insert` or the [`Buffer` table engine](/en/engines/table-engines/special/buffer) results in additional buffering.