INDEX BUILDING IN HYBRID DATA SYSTEM

摘要

The building of an index in a hybrid data system that includes both relational data associated with a relational database system, and external data that is outside of the relational database system in an external data source. The building of the index includes the generating of an external data index of unit portions of the external data, the unit portion being measured common to multiple different formats of the external data. The external data index is usable to more quickly find unit portions that match one or more search criteria directed to the relational database system even though the external data source is outside of the relational database system. Queries may be evaluated in the context of this index to identify relational data and unit portion sets that are relevant to the query.

主权项

1. A method for building an index in a hybrid data system that includes both relational data associated with a relational database system, and external data that is outside of the relational database system in an external data source, the method comprising:
an act of determining a name in the identified structured representation to index by; an act of generating an external data index of a plurality of unit portions of the external data that indexes by the determined name, the unit portion being measured common to a plurality of different formats of external data, the plurality of unit portions including unit portions of multiple different formats, the external data index usable to more quickly find unit portions that match one or more search criteria directed to the relational database system even though the external data source is outside of the relational database system, the act of generating the external data index comprising the following for each unit portion of the plurality unit portions: an act of identifying a structured representation of the unit portion, the structured representation including a structural context of the determined name; an act of reviewing the identified structured representation; and in response to the act of reviewing and determining, an act of generating a portion of the external data index that maps a value of the name to the unit portion of the external data.