Using delta relations to optimize condition evaluation in active databases:
Abstract: "We give a method for improving the efficiency of condition evaluation during rule processing in active database systems. The method derives, from a rule condition, two optimized conditions that can be used in place of the original condition when a previous value (true or false) of th...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Stanford, Calif.
1993
|
| Schriftenreihe: | Stanford University / Computer Science Department: Report STAN CS
1495 |
| Schlagworte: | |
| Zusammenfassung: | Abstract: "We give a method for improving the efficiency of condition evaluation during rule processing in active database systems. The method derives, from a rule condition, two optimized conditions that can be used in place of the original condition when a previous value (true or false) of the original condition is known. The derived conditions are more efficient than the original condition because they replace references to entire database relations by references to delta relations, which typically are much smaller. Delta relations are accessible to rule conditions in almost all current active database systems, making this optimization broadly applicable. We also specify an attribute grammar based implementation of our method." |
| Beschreibung: | 25 S. |
Internformat
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| 100 | 1 | |a Baralis, Elena |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Using delta relations to optimize condition evaluation in active databases |c Elena Baralis ; Jennifer Widom |
| 264 | 1 | |a Stanford, Calif. |c 1993 | |
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| 490 | 1 | |a Stanford University / Computer Science Department: Report STAN CS |v 1495 | |
| 520 | 3 | |a Abstract: "We give a method for improving the efficiency of condition evaluation during rule processing in active database systems. The method derives, from a rule condition, two optimized conditions that can be used in place of the original condition when a previous value (true or false) of the original condition is known. The derived conditions are more efficient than the original condition because they replace references to entire database relations by references to delta relations, which typically are much smaller. Delta relations are accessible to rule conditions in almost all current active database systems, making this optimization broadly applicable. We also specify an attribute grammar based implementation of our method." | |
| 650 | 4 | |a Databases | |
| 700 | 1 | |a Widom, Jennifer |e Verfasser |4 aut | |
| 810 | 2 | |a Computer Science Department: Report STAN CS |t Stanford University |v 1495 |w (DE-604)BV008928280 |9 1495 | |
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Datensatz im Suchindex
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| author | Baralis, Elena Widom, Jennifer |
| author_facet | Baralis, Elena Widom, Jennifer |
| author_role | aut aut |
| author_sort | Baralis, Elena |
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| bvnumber | BV009568018 |
| ctrlnum | (OCoLC)30464433 (DE-599)BVBBV009568018 |
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| id | DE-604.BV009568018 |
| illustrated | Not Illustrated |
| indexdate | 2024-07-09T17:37:14Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-006321077 |
| oclc_num | 30464433 |
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| physical | 25 S. |
| publishDate | 1993 |
| publishDateSearch | 1993 |
| publishDateSort | 1993 |
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| series2 | Stanford University / Computer Science Department: Report STAN CS |
| spelling | Baralis, Elena Verfasser aut Using delta relations to optimize condition evaluation in active databases Elena Baralis ; Jennifer Widom Stanford, Calif. 1993 25 S. txt rdacontent n rdamedia nc rdacarrier Stanford University / Computer Science Department: Report STAN CS 1495 Abstract: "We give a method for improving the efficiency of condition evaluation during rule processing in active database systems. The method derives, from a rule condition, two optimized conditions that can be used in place of the original condition when a previous value (true or false) of the original condition is known. The derived conditions are more efficient than the original condition because they replace references to entire database relations by references to delta relations, which typically are much smaller. Delta relations are accessible to rule conditions in almost all current active database systems, making this optimization broadly applicable. We also specify an attribute grammar based implementation of our method." Databases Widom, Jennifer Verfasser aut Computer Science Department: Report STAN CS Stanford University 1495 (DE-604)BV008928280 1495 |
| spellingShingle | Baralis, Elena Widom, Jennifer Using delta relations to optimize condition evaluation in active databases Databases |
| title | Using delta relations to optimize condition evaluation in active databases |
| title_auth | Using delta relations to optimize condition evaluation in active databases |
| title_exact_search | Using delta relations to optimize condition evaluation in active databases |
| title_full | Using delta relations to optimize condition evaluation in active databases Elena Baralis ; Jennifer Widom |
| title_fullStr | Using delta relations to optimize condition evaluation in active databases Elena Baralis ; Jennifer Widom |
| title_full_unstemmed | Using delta relations to optimize condition evaluation in active databases Elena Baralis ; Jennifer Widom |
| title_short | Using delta relations to optimize condition evaluation in active databases |
| title_sort | using delta relations to optimize condition evaluation in active databases |
| topic | Databases |
| topic_facet | Databases |
| volume_link | (DE-604)BV008928280 |
| work_keys_str_mv | AT baraliselena usingdeltarelationstooptimizeconditionevaluationinactivedatabases AT widomjennifer usingdeltarelationstooptimizeconditionevaluationinactivedatabases |