Pivotal Software, Inc.

Datometry, Inc.

Zhongxian Gu

Florian Michael Waas

Lyublena Rosenova Antova

Mohamed A Soliman

Michael Alexander Duller

Tuan Anh Cao

Entong Shen

Michail Petropoulos

John Glenn Eshleman

Mohamed F Soliman

Amr El-Helw

Mohamed Y Soliman

A method for providing database management system support to a source application configured to operate with a source database management system Is provided. The method comprises detecting database management system communications issued by the source application to the source database management system; and responsive to said database management systems communications, impersonating the source database management system to the source application.

Method and system for transparent interoperability between applications and data management systems

A system for controlling access to a downstream database management system (DMS) is provided. The system comprises an interface to maintain client connections with a plurality of upstream clients; a pooling component to establish a dynamic pool, and to selectively route each client connection to a pool; within each pool maintaining a queue comprising client database requests associated with particular client connections; and selectively granting access to the client database requests within each queue to at least one downstream DMS.

Method and system for workload management for data management systems

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for dynamic partition selection. One of the methods includes receiving a representation of a query plan generated for a query, wherein the query plan includes a dynamic scan operator that represents a first computing node obtaining tuples of one or more partitions of a table from storage and transferring the tuples to a second computing node that executes a parent operator of the dynamic scan operator. A partition selector operator is generated corresponding to the dynamic scan operator. A location in the query plan is determined for the partition selector operator. A modified query plan is generated having the partition selector operator at the determined location.

Dynamic partition selection

A method for providing interoperability between a plurality of database management system. The method comprises a server communicably connected to a plugin-application; receiving, from the source application, a connection request; intercepting communications issued by the source application to a source database management system; and responsive to said intercepted communications, impersonating the source database management system as a target database management system.

Query optimizer accuracy is tested by measuring the actual execution times on a database of each of a plurality of alternative query plans for each of a plurality of queries, first ranking the plans by the actual execution times, then ranking the plans by estimated execution times, and correlating the two rankings by computing a rank correlation metric. The rank correlation metric is normalized so that different optimizers can be objectively compared.

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Davis, CA, United States of America

Zhongxian Gu