Estimation of input/output requirements for table probe in join processing
A join operation is costed by estimating the input/output operations (disk swaps) that will be required for retrieval of tuples from the outer and inner tables. A specific method is presented for estimating the number of input/output operations needed for given inner and outer data tables, which met...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A join operation is costed by estimating the input/output operations (disk swaps) that will be required for retrieval of tuples from the outer and inner tables. A specific method is presented for estimating the number of input/output operations needed for given inner and outer data tables, which method models the retrieval of randomly arranged data from that table. |
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