Facebook, Inc.

Wojciech Galuba

Breno Pompeu Roberto

Michael Benjamin Nowak

Ye Lu

Flavio Oliveira

Kevin Alan Schaeffer

Brent Bannon

Systems, methods, and non-transitory computer-readable media can receive a query that includes at least one operation for aggregating data stored in one or more database tables. A determination is made that at least a portion of the data being aggregated by the operation has been pre-computed. The query is optimized so that the operation uses the pre-computed data when executed.

Systems and methods for optimizing queries

An embodiment of a system and method of surveying users on a social networking system is described which limits the frequency in which any one user is surveyed. Users are assigned into a multi-layered survey pool based on a hash value derived from a user identification number for the online social network that is assigned to the user. Users are randomly offered the opportunity to take a survey, and the subject matter of the survey is at least partially determined by the layer from which the survey obtains its sample populace.

Survey segmentation

Growing community of inventors

San Francisco, CA, United States of America

Wojciech Galuba