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lightning: adjust lightning precheck version #8487

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Feb 24, 2022
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lightning: adjust lightning precheck version #8487

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2 changes: 1 addition & 1 deletion tidb-lightning/tidb-lightning-prechecks.md
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Expand Up @@ -18,4 +18,4 @@ summary: 本文档介绍了 TiDB Lightning 前置检查功能，确保 TiDB Ligh
| 数据文件是否有大 CSV 文件 | >= 5.3.0 | 当备份文件中出现大于 10 GiB 的 CSV 文件且无法进行自动切分 (StrictFormat=false) 的时候，会导致导入性能下降。该检查的目的是提醒用户确保数据格式的情况下，开启自动切分 CSV 功能。 |
| 是否可以从断点恢复 | >= 5.3.0 | 该检查是确保断点恢复过程中，不会出现对源文件和数据库中 schema 进行修改，导致导入错误数据的情况。|
| 是否可以导入数据到已存在的数据表中 | >= 5.3.0 | 当导入到已创建好的数据表中时，该检查尽可能的检查此次导入的源文件是否和已存在的数据表匹配。检查列数是否匹配，如果源文件存在列名，则检查列名是否匹配。当源文件存在缺省列，则检查缺省列在数据表中是否存在 Default Value，如果存在，则检查通过。|
| 导入的目标表是否为空 | >= 5.4.0 | 如果导入的目标表不为空，则 TiDB Lightning 会自动报错退出；如果开启了并行导入模式 (incremental-import = true)，则会跳过此检查项。 |
| 导入的目标表是否为空 | >= 5.3.1 | 如果导入的目标表不为空，则 TiDB Lightning 会自动报错退出；如果开启了并行导入模式 (incremental-import = true)，则会跳过此检查项。 |