公开(公告)号：US10303726B2

公开(公告)日：2019-05-28

申请号：US14540781

申请日：2014-11-13

Applicant: SAP SE

Inventor： Christoph Weyerhaeuser ,  Tobias Mindnich ,  Johannes Merx ,  Joerg Schad ,  Stefan Dipper

IPC: G06F16/9535 ,  G06F16/2453 ,  G06F16/901

Abstract: According to an aspect, a system for moving a filter in a query model to ensure query semantics includes a query engine configured to obtain a query model for a query to be executed on a database. The query engine includes a query optimizer configured to instantiate the query model by merging the query with the query model. The query optimizer includes a filter mover configured to move a filter to a point within the instantiated query model such that semantics for the query within the instantiated query model is ensured.