User Charge Estimation in Numeric Online Databases: A Methodology |
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... advance , prior to query execution . The undesirable consequences will be examined first and the problems associated with charge estimates thereafter . From the end - user point of view , sheer uncertainty about the actual charges for ...
... advance , prior to query execution . The undesirable consequences will be examined first and the problems associated with charge estimates thereafter . From the end - user point of view , sheer uncertainty about the actual charges for ...
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... advance , during the query negotiation phase . The problem of advance charge estimation in NDBS is addressed in this paper . In order to solve this problem , a method for estimating the numbers of data items satisfying the query ...
... advance , during the query negotiation phase . The problem of advance charge estimation in NDBS is addressed in this paper . In order to solve this problem , a method for estimating the numbers of data items satisfying the query ...
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... advance , during the query negotiation phase . 7.9 It is difficult to estimate query costs in advance , even in BDBs , and it is much more difficult in NDBs . A method of estimating query processing costs in advance has been described ...
... advance , during the query negotiation phase . 7.9 It is difficult to estimate query costs in advance , even in BDBs , and it is much more difficult in NDBs . A method of estimating query processing costs in advance has been described ...
Contents
USER CHARGING | 13 |
THE RELATIONAL DATA MODEL | 20 |
CARDINALITY ESTIMATION IN NUMERIC ONLINE | 32 |
Copyright | |
7 other sections not shown
Common terms and phrases
A-names access strategy Appendix approach attribute description set attribute name set attribute selectivity attribute values attributes PRODUCT-NO basis BDBs candidate keys cardinality estimation charging methods CODATA components computed connect-time considered constructed data model database files Database Management Database Management Systems database user developed elementary predicates English Summary example expression F1 and F2 FD-set file design file organization file structures Finland functional dependencies implementation information retrieval Information Science intermediate files inverted file Järvelin join attribute join predicate julkaisuja manipulation MANUF-NO MARKET-SHARE methodology n-tuple NDBs Numeric Databases online databases operand file description procedure cost model processing cost PRODUCTS file QSALES query cardinality query cost modelling query negotiation query optimization query processing query results r-card r-description RA operations records relational algebra relational data model restriction predicate result file description SIGMOD sort-key storage parameters Systems TAHITI TRADEMARK TYPE unit charges University of Tampere upper bound user charge estimation vendor