NAVIGATION DEVICE DATABASE UPDATE SYSTEM

A difference file which indicates a difference between a second relational database and a first relational database may be transferred to a navigation device. The navigation device may store a first compressed database version of the first relational database. The navigation device may restore datab...

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Bibliographische Detailangaben
Hauptverfasser:	KUNATH PETER, PRINZ ANDREAS, WELSCHER JUERGEN, SAMOKHIN VIKTOR
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A difference file which indicates a difference between a second relational database and a first relational database may be transferred to a navigation device. The navigation device may store a first compressed database version of the first relational database. The navigation device may restore database pages of the second relational database based on the first compressed database version and the difference file. The restoration may be performed on per-page level. The restoration may involve reading and uncompressing a database page from the first compressed database version, and modifying the uncompressed database page in accordance with the difference file. The modified database page, which may correspond to a restored page of the second relational database, may be compressed and appended to a target database.