Sap Se

Sap Ag

Marco Paskamp

Alexander Schroeder

Juchang Lee

Sang Kyun Cha

Michael Muehle

Jaeyun Noh

Chulwon Lee

Kerstin Welk

Martin Fei

Christoph Bautz

Tilo Heinrich

Saskia Kurz

Thomas Loetzer

Enno Folkerts

Methods, systems, and computer-readable storage media for executing a first application on a source system during production use of the source system, providing a second application on a target system, during the production use of the source system: migrating data from the source system to the target system based on a catalog delta, and a data delta, each of the catalog delta, and the data delta being periodically determined, and determining whether a completion time exceeds a threshold time, the completion time being determined based on a last-determined data delta, and, in response to determining that the completion time does not exceed the threshold time: halting production use of the source system, and completing migration to the target system based on the last-determined data delta.

Minimizing downtime in migrating content of databases systems

A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, determination of a second database node of the two or more database nodes associated with the first query, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and a first identifier of the second database node from the first database node to the client device.

Client-side statement routing in distributed database

A system includes reception of a first query from a client device at a first database node of a database instance, determination of routing information associated with the first query, compilation of the first query at the first database node to generate first compiled code, transmission of the first compiled code and the routing information to the client device, reception of the compiled code from the client device at a second database node, determination, at the second database node, that data associated with the compiled query is associated with a third database node, transmission of the compiled code from the second database node to the third database node, reception of query results at the second database node from the third database node, and transmission of the query results and an indication to update the routing information from the second database node to the client device.

Update protocol for client-side routing information

A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, the first query specifying a first database table which is partitioned among two or more of the two or more database nodes, determination of first partitioning metadata of the first database table, the first partitioning metadata usable to identify one of the two or more database nodes based on table key values, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and the first partitioning metadata from the first database node to the client device.

Client-side statement routing for partitioned tables

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Hansestadt Stendal, Germany

Marco Paskamp