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ALTER EXTERNAL LOCATION

  • Artikkeli

Applies to: check marked yes Databricks SQL check marked yes Databricks Runtime 10.4 LTS and above check marked yes Unity Catalog only

Alters properties of an external location or renames the location.

Syntax

ALTER EXTERNAL LOCATION location_name
   { RENAME TO to_location_name |
     SET URL url_str [ FORCE ] |
     SET STORAGE CREDENTIAL credential_name |
     [ SET ] OWNER TO principal }

Any object name that includes special characters, such as hyphens (-), must be surrounded by backticks (` `). Object names with underscores (_) don’t require backticks. See Names and Examples.

Parameters

  • location_name

    Identifies the external location being altered.

  • RENAME TO to_location_name

    Renames the location. The name must be unique among all locations in the metastore.

  • SET URL url_str [ FORCE ]

    url_str must be a STRING literal with the location of the cloud storage described as an absolute URL.

    Unless you specify FORCE the statement will fail if the location is currently in use.

  • SET STORAGE CREDENTIAL credential_name

    Updates the named credential used to access this location. If the credential does not exist Databricks SQL raises an error.

  • [ SET ] OWNER TO principal

    Transfers ownership of the storage location to principal.

    Applies to: check marked yes Databricks SQL check marked yes Databricks Runtime 11.3 LTS and above

    SET is allowed as an optional keyword.

Examples

The following examples use location names that don’t include special characters, such as hyphens (-). Any object name that includes special characters must be surrounded by backticks (` `). See Names.

-- Rename a location
> ALTER EXTERNAL LOCATION descend_loc RENAME TO decent_loc;

-- Redirect the URL associated with the location
> ALTER EXTERNAL LOCATION best_loc SET URL 'abfss://container@storageaccount.dfs.core.windows.net/best_location' FORCE;

-- Change the credentials used to access the location
> ALTER EXTERNAL LOCATION best_loc SET STORAGE CREDENTIAL street_cred;

-- Change ownership of the external location
> ALTER EXTERNAL LOCATION best_loc OWNER TO `alf@melmak.et`