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sql: update sql-statement-create-index.md #11376

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Sep 22, 2022
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sql: update sql-statement-create-index.md #11376

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2 changes: 1 addition & 1 deletion sql-statements/sql-statement-create-index.md
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Expand Up @@ -288,7 +288,7 @@ CREATE UNIQUE INDEX c1 ON t1 (c1) INVISIBLE;

## MySQL 兼容性

* 不支持 `FULLTEXT`，`HASH` 和 `SPATIAL` 索引。
* TiDB 支持解析 `FULLTEXT` 和 `SPATIAL` 语法，但尚不支持使用 `FULLTEXT`，`HASH` 和 `SPATIAL` 索引。
* 不支持降序索引 （类似于 MySQL 5.7）。
* 无法向表中添加 `CLUSTERED` 类型的 `PRIMARY KEY`。要了解关于 `CLUSTERED` 主键的详细信息，请参考[聚簇索引](/clustered-indexes.md)。
* 表达式索引与视图存在兼容性问题。通过视图进行查询时，无法使用上表达式索引。
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