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46 lines
1.3 KiB
Markdown
46 lines
1.3 KiB
Markdown
---
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toc_priority: 45
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toc_title: USER
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---
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# ALTER USER {#alter-user-statement}
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Changes ClickHouse user accounts.
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Syntax:
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``` sql
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ALTER USER [IF EXISTS] name1 [ON CLUSTER cluster_name1] [RENAME TO new_name1]
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[, name2 [ON CLUSTER cluster_name2] [RENAME TO new_name2] ...]
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[IDENTIFIED [WITH {PLAINTEXT_PASSWORD|SHA256_PASSWORD|DOUBLE_SHA1_PASSWORD}] BY {'password'|'hash'}]
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[[ADD|DROP] HOST {LOCAL | NAME 'name' | REGEXP 'name_regexp' | IP 'address' | LIKE 'pattern'} [,...] | ANY | NONE]
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[DEFAULT ROLE role [,...] | ALL | ALL EXCEPT role [,...] ]
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[SETTINGS variable [= value] [MIN [=] min_value] [MAX [=] max_value] [READONLY|WRITABLE] | PROFILE 'profile_name'] [,...]
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```
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To use `ALTER USER` you must have the [ALTER USER](../../../sql-reference/statements/grant.md#grant-access-management) privilege.
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## Examples {#alter-user-examples}
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Set assigned roles as default:
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``` sql
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ALTER USER user DEFAULT ROLE role1, role2
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```
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If roles aren’t previously assigned to a user, ClickHouse throws an exception.
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Set all the assigned roles to default:
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``` sql
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ALTER USER user DEFAULT ROLE ALL
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```
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If a role is assigned to a user in the future, it will become default automatically.
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Set all the assigned roles to default, excepting `role1` and `role2`:
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``` sql
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ALTER USER user DEFAULT ROLE ALL EXCEPT role1, role2
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```
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