2012-10-31 Notes on Release 3.3.0 =============================================================================== New algebra modules: -------------------- * SymbolicTrajectoryAlgebra: This algebra manages time-dependent strings and provides a pattern matching on such structures. * OSM Algebra The OSM Algebra provides import functions for Open Street Map data. * Map Matching Algebra This algebra provides methods to map moving points to an underlying network. * Hadoop, HadoopParallel Algebra These algebras provide mechanisms for parallel execution of queries on several computers. * Distributed Algebra This algebra is an alternative approach for using Secondo in parallel. * Trie Algebra The Trie algebra provides inverted files as an index structure for large documents. * GroupBy Algebra This algebra provides a hash based group by operation. Optimizer Extension ------------------- The optimizer now can handle queries with an arbitrary number of relations and predicates. Main Memory Management ---------------------- Instead of assigning a fixed amount of main memory to each operator, Secondo's QueryProcessor now distributes the available memory to all operators asking for it. Query Construction Viewer ------------------------- This new viewer helps users to formulate queries. Extensions of Algebras ----------------------- Algebra modules were extended by new types and operators, e.g., for searching for regular expressions within texts. Adaption to new Operating Systems ---------------------------------- Secondo Version 3.3.0 works with SuSe 12.2 and Ubuntu 12.04.