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Forbid adding schema properties if they existed before #2496

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Jan 17, 2023
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Forbid adding schema properties if they existed before #2496

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Forbid adding schema properties if they existed before
abby-cyber Jan 16, 2023
3debdaf
Update 3.alter-edge.md
abby-cyber Jan 16, 2023
6e61dd9
Update 3.alter-edge.md
abby-cyber Jan 16, 2023
efe5b88
desc fix
abby-cyber Jan 16, 2023
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4 changes: 3 additions & 1 deletion docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
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`ALTER TAG`语句可以修改 Tag 的结构。例如增删属性、修改数据类型，也可以为属性设置、修改 [TTL](../8.clauses-and-options/ttl-options.md)（Time-To-Live）。

## 前提条件
## 注意事项

- 登录的用户必须拥有对应权限才能执行`ALTER TAG`语句。详情请参见[内置角色权限](../../7.data-security/1.authentication/3.role-list.md)。

- 确保要修改的属性不包含索引，否则`ALTER TAG`时会报冲突错误`[ERROR (-1005)]: Conflict!`。删除索引请参见 [drop index](../14.native-index-statements/6.drop-native-index.md)。

- 确保新增的属性名不与被删除的属性名同名，否则新增属性会失败。
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## 语法

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4 changes: 3 additions & 1 deletion docs-2.0/3.ngql-guide/11.edge-type-statements/3.alter-edge.md
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`ALTER EDGE`语句可以修改 Edge type 的结构。例如增删属性、修改数据类型，也可以为属性设置、修改 [TTL](../8.clauses-and-options/ttl-options.md)（Time-To-Live）。

## 前提条件
## 注意事项

- 登录的用户必须拥有对应权限才能执行`ALTER EDGE`语句。详情请参见[内置角色权限](../../7.data-security/1.authentication/3.role-list.md)。

- 确保要修改的属性不包含索引，否则`ALTER EDGE`时会报冲突错误`[ERROR (-1005)]: Conflict!`。删除索引请参见 [drop index](../14.native-index-statements/6.drop-native-index.md)。

- 确保新增的属性名不与被删除的属性名同名，否则新增属性会失败。

## 语法

```ngql
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