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add limit to import into #18875

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Sep 11, 2024
Merged

add limit to import into #18875

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D3Hunter Sep 10, 2024
85757f4
Update sql-statements/sql-statement-import-into.md
hfxsd Sep 10, 2024
96dbd8d
Update sql-statement-import-into.md
hfxsd Sep 10, 2024
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1 change: 1 addition & 0 deletions sql-statements/sql-statement-import-into.md
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Expand Up @@ -21,6 +21,7 @@ The `IMPORT INTO` statement lets you import data to TiDB via the [Physical Impor
## Restrictions

- `IMPORT INTO` only supports importing data into existing empty tables in the database.
- `IMPORT INTO` does not support importing data into a [temporary table](/temporary-tables.md) or a [cached table](/cached-tables.md).
- `IMPORT INTO` does not support transactions or rollback. Executing `IMPORT INTO` within an explicit transaction (`BEGIN`/`END`) will return an error.
- `IMPORT INTO` does not support working simultaneously with features such as [Backup & Restore](https://docs.pingcap.com/tidb/stable/backup-and-restore-overview), [`FLASHBACK CLUSTER`](/sql-statements/sql-statement-flashback-cluster.md), [acceleration of adding indexes](/system-variables.md#tidb_ddl_enable_fast_reorg-new-in-v630), data import using TiDB Lightning, data replication using TiCDC, or [Point-in-Time Recovery (PITR)](https://docs.pingcap.com/tidb/stable/br-log-architecture). For more compatibility information, see [Compatibility of TiDB Lightning and `IMPORT INTO` with TiCDC and Log Backup](https://docs.pingcap.com/tidb/stable/tidb-lightning-compatibility-and-scenarios).
- During the data import process, do not perform DDL or DML operations on the target table, and do not execute [`FLASHBACK DATABASE`](/sql-statements/sql-statement-flashback-database.md) for the target database. These operations can lead to import failures or data inconsistencies. In addition, it is **NOT** recommended to perform read operations during the import process, as the data being read might be inconsistent. Perform read and write operations only after the import is completed.
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