Processing abstract derived entities defined in a data abstraction model

摘要

Techniques involving an abstract derived entity. The abstract derived entity is a data object present in an abstract data model that may be referenced by other entities in the abstract data model as though it were a relational table present in a physical data source. The abstract data model provides data access independent of the manner in which the data is physically represented in a set of physical data sources. The abstract derived entity may be used to provide aggregate data joined with other non-aggregate data. The abstract derived entity may describe a relational table comprising a set of aggregate data used to form a column of the relational table joined to other columns formed from the sets of input data specified by the abstract derived entity. The resulting abstract derived table may be queried as though it were an actual relational table stored in a physical data source.