TY - GEN
T1 - Updating Duplicate values in distributed multidatabase systems
AU - Konomi, Shin'Ichi
AU - Furukawa, Tetsuya
PY - 1991/1/1
Y1 - 1991/1/1
N2 - Redundant data for fast retrieval increase costs of updates in distributed multidatabase systems. In this paper, costs of updates are reduced by introducing further redundancies. Duplicate values - redundant data that are obtained from relationships of original values - must be updated to preserve their currency when original values are updated. To update duplicate values, relationships of original data are retrieved in order to determine which duplicate values must be updated. If a file with duplicate values satisfies the superkey condition introduced in this paper, we can perform the retrieval required for updates faster. Redundant data are added to a database site to satisfy the condition.
AB - Redundant data for fast retrieval increase costs of updates in distributed multidatabase systems. In this paper, costs of updates are reduced by introducing further redundancies. Duplicate values - redundant data that are obtained from relationships of original values - must be updated to preserve their currency when original values are updated. To update duplicate values, relationships of original data are retrieved in order to determine which duplicate values must be updated. If a file with duplicate values satisfies the superkey condition introduced in this paper, we can perform the retrieval required for updates faster. Redundant data are added to a database site to satisfy the condition.
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U2 - 10.1109/IMS.1991.153715
DO - 10.1109/IMS.1991.153715
M3 - Conference contribution
T3 - Proceedings - 1st International Workshop on Interoperability in Multidatabase Systems, IMS 1991
SP - 243
EP - 246
BT - Proceedings - 1st International Workshop on Interoperability in Multidatabase Systems, IMS 1991
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1st International Workshop on Interoperability in Multidatabase Systems, IMS 1991
Y2 - 7 April 1991 through 9 April 1991
ER -