Sybase, Inc.

Sap Se

Kaushal Mittal

Blaine French

Steven A Kirk

Nandan Marathe

Anant Agarwal

Mahendra Chavan

Shailesh Kamalakar Mungikar

John Smirnios

Kurt Wilhelm Deschler

Curtis Johnson

Victor Mesenzeff, Jr

William Harrison Cox

Disclosed herein are methods for retrieving data from a database. An embodiment operates searching for a key in a first index. The method determines that the searching will require a storage access request and issues the storage access request. The method continues searching for the key in a second index.

Query access optimizations for tiered index architecture

Tiered index management

Distributing work in a distributed computing environment that includes multiple nodes. An individual node can receive a work assignment, which can then be divided into a plurality of work units. A first work unit can then be distributed to a first worker node. At least a portion of the first work unit can be re-distributed to a second worker node in response to determining that the first worker node has experienced a failure condition with respect to the first work unit.

Non-periodic check-pointing for fine granular retry of work in a distributed computing environment

Disclosed herein are system, method, and computer program product embodiments for utilizing a backup catalog to perform synchronized backup and recovery of heterogeneous database systems. An embodiment operates by performing a global data backup of a heterogeneous database system comprising a first database management system (DBMS) at a first server and a second DBMS at a second server and recording a global data backup entry identifying the global data backup into a backup catalog. Upon receiving log backup notifications regarding asynchronous log backups on the first server and the second server, log backup entries identifying the asynchronous log backups are recorded into the backup catalog. To successfully perform a point-in-time recovery, the embodiment operates by using the backup catalog to identify data and log backups required for the recovery of the first and second servers to a recovery timestamp associated with the point-in-time recovery.

Synchronized backup and recovery of database systems

Disclosed herein are system, method, and computer program product embodiments for accelerating database queries containing bitmap-based conditions. An embodiment operates by determining a bitmap, where the bitmap represents a set of rows that have satisfied a conjunct that precedes a negated condition in a query expression and restricting the evaluation of the negated condition to the set of rows represented by the bitmap.

Execution of negated conditions using a bitmap

Growing community of inventors

Pune, India

Kaushal Mittal