Invention Grant
- Patent Title: Exporting and importing database tables in a multi-user database environment
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Application No.: US14553548Application Date: 2014-11-25
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Publication No.: US09778991B2Publication Date: 2017-10-03
- Inventor: Ivan Schreter , Muhammed Sharique , Deepak Shrivastava , Mihnea Andrei
- Applicant: Ivan Schreter , Muhammed Sharique , Deepak Shrivastava , Mihnea Andrei
- Applicant Address: DE Walldorf DE Walldorf
- Assignee: SAP SE,SAP GLOBAL IP GROUP
- Current Assignee: SAP SE,SAP GLOBAL IP GROUP
- Current Assignee Address: DE Walldorf DE Walldorf
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: G06F17/30
- IPC: G06F17/30 ; G06F11/14 ; G06F15/16

Abstract:
Disclosed herein are system, method, and computer program product embodiments for exporting and importing database tables in a database management system using multi-version concurrency control (MVCC). An embodiment operates by first initiating an export of a database table in the database management system. During the export transaction, temporary creation and deletion timestamps are identified from MVCC information associated with each row in the database table. Each temporary timestamp is associated with a database transaction. A timestamp map is then generated that associates the identified temporary timestamps with commit timestamps of the associated transactions. The database table, associated MVCC information, timestamp map, and snapshot timestamp of the export transaction are written to a binary file. When an import of the database table is initiated in a database management system, the database table is reconstructed from the table rows, associated MVCC information, timestamp map, and snapshot timestamp of the export transaction in the binary file.
Public/Granted literature
- US20160147809A1 Exporting and Importing Database Tables in a Multi-User Database Environment Public/Granted day:2016-05-26
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