The invention relates to data warehousing systems (1) wherein a search engine (2) implemented by a decision application server (4) acts on a relational database (6) that contains a set of target records. The engine (2) is activated by queries for selecting records based on given criteria and comprises a module (8) for preconditioning the database (6) supplying a preconditioned encoded table (10), periodically updated at the same time as the relational database (6) itself, to a machine with vectorial capabilities (9) in order for it to be processed. It also comprises an agent (7) for extracting target records, activated by the queries based on the result of the processing of the table (10) installed in the machine with vectorial capabilities (9), from the relational database (6).