DROP DATABASE LINK

Description

Deletes database link objects.

Syntax

DROP [ PUBLIC ] DATABASE LINK [ IF EXISTS ] dblink_name;

Parameters

• dblink_name

  Name of a connection object.

• IF EXISTS

  Reports a notice instead of an error if the specified DATABASE LINK does not exist.

• PUBLIC

  Specifies the connection type. If PUBLIC is not specified, the database link is private by default.

Examples

-- Create an ORA-compatible database.
gaussdb=# CREATE DATABASE ora_test_db DBCOMPATIBILITY 'ORA';

-- Switch to another database.
gaussdb=# \c ora_test_db

-- Create a user with the SYSADMIN permission.
ora_test_db=# CREATE USER user1 WITH SYSADMIN PASSWORD '********';
ora_test_db=# SET ROLE user1 PASSWORD '********';

-- Create a private database link. host can be an IPv6 address.
ora_test_db=# CREATE DATABASE LINK private_dblink CONNECT TO 'user1' IDENTIFIED BY '********' USING (host '192.168.11.11',port '54399',dbname 'db01');

-- Drop the private database link.
ora_test_db=# DROP DATABASE LINK private_dblink;

-- Create a public database link. host can be an IPv6 address.
ora_test_db=# CREATE PUBLIC DATABASE LINK public_dblink CONNECT TO 'user1' IDENTIFIED BY '********' USING (host '192.168.11.11',port '54399',dbname 'db01');

-- Drop the public database link.
ora_test_db=# DROP PUBLIC DATABASE LINK public_dblink;

-- Drop the created user.
ora_test_db=# RESET ROLE;
ora_test_db=# DROP USER user1;

-- Switch back to the initial database and delete the test database. Replace postgres with the actual database name.
ora_test_db=# \c postgres
gaussdb=# DROP DATABASE ora_test_db;

Helpful Links

ALTER DATABASE LINK and CREATE DATABASE LINK