- 专利标题: Implementation of data access metrics for automated physical database design
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申请号: US17316901申请日: 2021-05-11
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公开(公告)号: US11550762B2公开(公告)日: 2023-01-10
- 发明人: Michael Brendle , Norman May , Robert Schulze , Alexander Boehm , Guido Moerkotte , Michael Grossniklaus
- 申请人: SAP SE
- 申请人地址: DE Walldorf
- 专利权人: SAP SE
- 当前专利权人: SAP SE
- 当前专利权人地址: DE Walldorf
- 代理机构: Fish & Richardson P.C.
- 主分类号: G06F16/21
- IPC分类号: G06F16/21 ; G06F16/22 ; G06F11/34 ; G06F16/2455 ; G06F16/2457 ; G06F16/2453 ; G06F16/215 ; H03M7/30
摘要:
The present disclosure involves systems, software, and computer implemented methods for improved design and implementation of data access metrics for automated physical database design. An example method includes identifying a database workload for which index advisor access counters are to be tracked. Each SQL statement in the database workload is executed. For each SQL statement, attribute sets are determined for which a selection predicate filters a result for an SQL statement. An output cardinality of each selection predicate is determined. A logarithmic counter for an attribute set corresponding to the selection predicate is determined based on the output cardinality of the selection predicate. The determined logarithmic counter is incremented. Respective values for logarithmic counters of the determined attributes are provided to an index advisor. The index advisor determines attribute sets for which to propose an index based on the logarithmic counters of the respective attribute sets.
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