Ailamaki, AnastasiaIdreos, StratosAlagiannis, IoannisBorovica, RenataBranco, Miguel Sergio De Oliveira2017-05-242017-05-242014https://infoscience.epfl.ch/handle/20.500.14299/137586A database system maintains a feature set of a modern database system while operating directly on raw data files. Systems may use an adaptive indexing mechanism that maintains positional information to provide efficient access to raw data files, a flexible caching structure, and techniques for selective parsing and selective tokenizing. In doing so, possible performance bottlenecks associated with repeated parsing, tokenizing, and expensive data type conversion costs can be overcome.patentUS9298754US201413651350682730