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Fix the descriptions about comment length in table, column, and index #8059

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Jan 13, 2022
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Fix the descriptions about comment length in table, column, and index #8059

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9fcf70e
Fix the descriptions about comment length in table, column, and index
CbcWestwolf Dec 25, 2021
906dcb6
Update sql-statements/sql-statement-create-index.md
CbcWestwolf Dec 27, 2021
ea5441c
Update sql-statements/sql-statement-create-table.md
CbcWestwolf Dec 27, 2021
afac5bd
Update sql-statement-create-index.md
CbcWestwolf Jan 5, 2022
85f634f
Update sql-statement-create-table.md
CbcWestwolf Jan 5, 2022
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Update sql-statement-create-table.md
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@CbcWestwolf
CbcWestwolf authored Jan 5, 2022
commit 85f634f471aa174e4004b8cd406dbdb119edd9e0
2 changes: 1 addition & 1 deletion sql-statements/sql-statement-create-table.md
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Expand Up @@ -191,7 +191,7 @@ mysql> DESC t1;
* 不支持 `FULLTEXT`，`HASH` 和 `SPATIAL` 索引。
* 为了与 MySQL 兼容，`index_col_name` 属性支持 length 选项，最大长度默认限制为 3072 字节。此长度限制可以通过配置项 `max-index-length` 更改，具体请参阅 [TiDB 配置文件描述](/tidb-configuration-file.md#max-index-length)。
* 为了与 MySQL 兼容，TiDB 会解析但忽略 `index_col_name` 属性的 `[ASC | DESC]` 索引排序选项。
* 表的 `COMMENT` 属性最多支持 2048 个字符；列的 `COMMENT` 属性最多支持 1024 个字符，不支持 `WITH PARSER` 选项。
* `COMMENT` 属性不支持 `WITH PARSER` 选项。
* TiDB 在单个表中最多支持 512 列。InnoDB 中相应的数量限制为 1017，MySQL 中的硬限制为 4096。详情参阅 [TiDB 使用限制](/tidb-limitations.md)。
* 当前仅支持 Range、Hash 和 Range Columns（单列）类型的分区表，详情参阅[分区表](/partitioned-table.md)。
* TiDB 会解析并忽略 `CHECK` 约束，与 MySQL 5.7 相兼容。详情参阅 [`CHECK` 约束](/constraints.md#check-约束)。
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