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Moritz Thomas

Wolfgang E Walter

Gregor Rieken

Stephan Toebben

Andreas Daum

Timm Steinbeck

Sven Krüppel-Berndt

Jacek Zuber

Iain Morrison

Thomas Quintus

A system for query planning and execution with reusable memory stack(s) is provided. In some implementations, the system performs operations comprising providing a first space in memory for storing first results of a first operator of a query, the first space located within a portion of a heap memory. The operations can further comprise generating at least a portion of the first results based on executing the first operator, providing a descriptor comprising information regarding the first space to a second operator which occurs after the first operator in a query plan, providing a second space in the previously allocated portion for storing second results of the second operator, and/or generating at least a portion of the second results based on executing the second operator using the first space. Related systems, methods, and articles of manufacture are also described.

Query planning and execution with reusable memory stack

A system and process that manages access to a resource in an enterprise service-oriented architecture environment. The system recognizes a master for each resource that has ultimate control over the respective resource. The master grants access to the resource though a lock system. If a system does not relinquish access to the resource, then the master is able to reclaim the lock to ensure the continued availability of the resource to all systems. This system ensures data coherency, while also improving performance by diminishing the amount of time a resource is unnecessarily locked and the time to obtain a lock.

Advanced concurrency management in enterprise service oriented architecture based integrated business processing of distributed application components

A method and system for providing a secure method and process for accessing resources that are made available by a server. A demilitarized zone (DMZ) framework provides a frontend system that is protected by a firewall and separated from a backend system by a second firewall. The frontend system provides the user interface functionality common to the backend but contains no access directly to the resources that the user interface operates upon. Placing the user interface on a separate machine from the resource data provides an additional layer of security. In addition, separate communication protocols are used between the user and the frontend and between the frontend and the backend system. Thus, a malicious programmer or program will not know the location of the resource or the method for communicating with the backend server to access the resource.

DMZ framework

A method and apparatus directed to receiving maintenance demands and historical maintenance data associated with maintenance items are presented. A plurality of models that each define locations, maintenance items, resources, cycles, and average performance is generated, wherein each model represents a hypothetical scenario adjustable by a user so that a model representing one scenario may be compared alongside another model to view the differences in result for various hypothetical scenarios. One or more plans are generated for each model and take into account the received maintenance demands and historical maintenance data. A work package is generated in view of the received maintenance demands and historical maintenance data and the plan.

Flexible maintenance planning

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Sandhausen, Germany

Moritz Thomas