公开(公告)号：US11907251B2

公开(公告)日：2024-02-20

申请号：US15690894

申请日：2017-08-30

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： Lakshminarayanan Chidambaran ,  Srividya Tata ,  Geeta Arora ,  Rajendra S. Pingte ,  Sneha Chandrababu ,  Ramkrishan Kanodia

IPC: G06F16/27 ,  G06F16/22

CPC classification number: G06F16/27 ,  G06F16/2219 ,  G06F16/2282

Abstract: Upon receiving a query at a local database server from a client directed to a LOB stored at a remote database server, a remote LOB locator is created comprising a local LOB locator indicating the LOB's location and a database link associated with the remote database server. The remote LOB locator is communicated to the client, which submits a request to the local database server to perform an operation directed to the LOB. The request is forwarded to the remote database server using the remote LOB locator, where the operation is performed. This mechanism is extended to work with sharded databases. Character set conversions are minimized when returning data to the client from the remote database server. Remote LOB locators may serve as bind variables for DML statements directed to local or remote tables. Local LOB locators may serve as bind variables for DML statements directed to remote tables.