A method and a system execute database insert calls in a MES system. The data to be stored into the database are represented in XML tree formats according to the S95 hierarchy model. The method includes: a) receiving as input a given XML tree corresponding to a given S95 hierarchy data to stored into the database; b) processing the given XML tree in order to generate a corresponding parallel structure; c) getting a given S95 entity type and its given set of node references from the given parallel structure; d) if the given set of node references is not empty, composing a database insert call passing the information of the given set of node references; e) if the given set of node references is not empty, executing the composed database insert call; and executing items c) to e) for all the S95 entity types of the given parallel structure.