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ALTER SYNONYM

Updated on 2024-05-07 GMT+08:00

Description

Modifies the attributes of the SYNONYM object.

Precautions

  • Currently, only the owner of the SYNONYM object can be changed.
  • Only the system administrator has the permission to modify the owner of the SYNONYM object.
  • The new owner must have the CREATE permission on the schema where the SYNONYM object resides.

Syntax

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ALTER SYNONYM synonym_name
    OWNER TO new_owner;

Parameters

  • synonym

    Specifies the name of the synonym to be modified, which can contain the schema name.

    Value range: a string. It must comply with the naming convention.

  • new_owner

    Specifies the new owner of the SYNONYM object.

    Value range: a string. It must be a valid username.

Examples

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-- Create a system administrator.
gaussdb=# CREATE USER sysadmin WITH SYSADMIN PASSWORD '********';

-- Switch the system administrator.
gaussdb=#  \c - sysadmin

-- Create synonym t1.
gaussdb=#  CREATE OR REPLACE SYNONYM t1 FOR ot.t1;

-- Create user u1.
gaussdb=# CREATE USER u1 PASSWORD '********';

-- Assign permissions to the new system administrator.
gaussdb=# GRANT ALL ON SCHEMA sysadmin TO u1;

-- Change the owner of synonym t1 to u1.
gaussdb=# ALTER SYNONYM t1 OWNER TO u1;

-- Delete synonym t1.
gaussdb=# DROP SYNONYM t1;

-- Revoke permissions from user u1.
gaussdb=# REVOKE ALL ON SCHEMA sysadmin FROM u1;

-- Delete user u1.
gaussdb=# DROP USER u1;

-- Switch to the initial user init_user. Replace init_user with the actual initial user name.
gaussdb=# \c - init_user

-- Delete user sysadmin.
gaussdb=# DROP USER sysadmin;

Helpful Links

CREATE SYNONYM and DROP SYNONYM

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