公开(公告)号：US10409864B2

公开(公告)日：2019-09-10

申请号：US14552808

申请日：2014-11-25

申请人： SAP SE

发明人： Ivan Schreter ,  Chang-Gyoo Park

IPC分类号： G06F17/30 ,  G06F16/9038 ,  G06F16/18 ,  G06F16/23

摘要： Disclosed herein are system, method, and computer program product embodiments for utilizing a transaction control block for providing reader-writer access to transaction commit status. An embodiment operates by receiving a row read request and determining that the row is versioned. The system determines that a first timestamp information for a row destroy transaction associated with the row exists in a transaction control block and retrieves the first timestamp information from the transaction control block.

公开(公告)号：US09959178B2

公开(公告)日：2018-05-01

申请号：US14657948

申请日：2015-03-13

申请人： SAP SE

发明人： Juchang Lee ,  Chang-Gyoo Park ,  Hyoung-Jun Na ,  Kyu-Hwan Kim

IPC分类号： G06F17/30 ,  G06F11/14

CPC分类号： G06F11/1469 ,  G06F11/1464 ,  G06F17/30368 ,  G06F17/30371 ,  G06F17/30377 ,  G06F17/30575 ,  G06F17/30578 ,  G06F17/30876 ,  G06F2201/80

摘要： Disclosed herein are system, method, and computer program product embodiments for replicating a database transaction to a replica table. An embodiment operates by receiving a replication log entry and an associated transaction commit log entry for a database transaction to be replayed to a row at a replica table. A row-ID value of the replication log entry is compared to a row-ID column value of the row at the replica table. The replication log entry is then replayed at a parallel log replayer based on the comparison. The database transaction is then committed to the replica table by replaying the associated transaction commit log entry at a transaction log replayer.

公开(公告)号：US09965360B2

公开(公告)日：2018-05-08

申请号：US14657938

申请日：2015-03-13

申请人： SAP SE

发明人： Juchang Lee ,  Kyu-Hwan Kim ,  Hyoung-Jun Na ,  Chang-Gyoo Park ,  Hyejeong Lee

IPC分类号： G06F17/30 ,  G06F11/14

CPC分类号： G06F11/1469 ,  G06F11/1464 ,  G06F17/30368 ,  G06F17/30371 ,  G06F17/30377 ,  G06F17/30575 ,  G06F17/30578 ,  G06F17/30876 ,  G06F2201/80

摘要： Disclosed herein are system, method, and computer program product embodiments for synchronizing lost change between a source table and a replica table. An embodiment operates by detecting a restart at a source node or a replica node. Row-ID values of replication log entries are then compared to row-ID column values of rows at a replica table of the replica node. Replication errors at a source table or the replica table are then determined based on the row-ID comparison. The rows of the source table and the replica table are then updated based on the determination.