DROP USER MAPPING
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## DROP USER MAPPING

DROP USER MAPPING — remove a user mapping for a foreign server

## Synopsis

    DROP USER MAPPING [ IF EXISTS ] FOR { user_name | USER | CURRENT_USER | PUBLIC } SERVER server_name

## Description

`DROP USER MAPPING` removes an existing user mapping from foreign server.

The owner of a foreign server can drop user mappings for that server for any user. Also, a user can drop a user mapping for their own user name if `USAGE` privilege on the server has been granted to the user.

## Parameters

`IF EXISTS`

  Do not throw an error if the user mapping does not exist. A notice is issued in this case.

`user_name`

  User name of the mapping. `CURRENT_USER` and `USER` match the name of the current user. `PUBLIC` is used to match all present and future user names in the system.

`server_name`

  Server name of the user mapping.

## Examples

Drop a user mapping `bob`, server `foo` if it exists:

    DROP USER MAPPING IF EXISTS FOR bob SERVER foo;

## Compatibility

`DROP USER MAPPING` conforms to ISO/IEC 9075-9 (SQL/MED). The `IF EXISTS` clause is a PostgreSQL extension.

## See Also

CREATE USER MAPPING, ALTER USER MAPPING

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