> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> Documentação sobre Role

# ALTER ROLE

Altera roles.

Sintaxe:

```sql theme={null}
ALTER ROLE [IF EXISTS] name1 [RENAME TO new_name |, name2 [,...]] 
    [ON CLUSTER cluster_name]
    [DROP ALL PROFILES]
    [DROP ALL SETTINGS]
    [DROP PROFILES 'profile_name' [,...] ]
    [DROP SETTINGS variable [,...] ]
    [ADD|MODIFY SETTINGS variable [= value] [MIN [=] min_value] [MAX [=] max_value] [CONST|READONLY|WRITABLE|CHANGEABLE_IN_READONLY] | PROFILE 'profile_name'] [,...]
    [SET variable [= value] [MIN [=] min_value] [MAX [=] max_value] [CONST|READONLY|WRITABLE|CHANGEABLE_IN_READONLY] [,...] ]
    [ADD PROFILES 'profile_name' [,...] ]
```

`SET variable = value` é um alias para `MODIFY SETTING variable = value`: ele altera um único setting diretamente, mantendo o restante, ao contrário da cláusula `SETTINGS` sem modificador, que substitui toda a lista de settings e também remove todos os profiles herdados (parent).