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update tidb-distributed-execution-framework.md (#17956) #18104

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Jul 25, 2024
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update tidb-distributed-execution-framework.md (#17956) #18104

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4 changes: 0 additions & 4 deletions tidb-distributed-execution-framework.md
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Expand Up @@ -38,10 +38,6 @@ TiDB 采用计算存储分离架构，具有出色的扩展性和弹性的扩缩

分布式执行框架最多同时调度 16 个任务（包括 [`ADD INDEX`](/sql-statements/sql-statement-add-index.md) 和 [`IMPORT INTO`](/sql-statements/sql-statement-import-into.md)）。

### `ADD INDEX` 的使用限制

- 不支持通过分布式执行框架对数据类型为 [`TIMESTAMP`](/data-type-date-and-time.md#timestamp-类型) 的列添加索引，否则会导致索引和数据不一致的问题。

## 启用前提

如需使用分布式执行框架执行 [`ADD INDEX`](/sql-statements/sql-statement-add-index.md) 任务，需要先开启 [Fast Online DDL](/system-variables.md#tidb_ddl_enable_fast_reorg-从-v630-版本开始引入) 模式。
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