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公开(公告)号:US20170004177A1
公开(公告)日:2017-01-05
申请号:US15260175
申请日:2016-09-08
Applicant: SAP SE
Inventor: FRANZ FAERBER , Juchang Lee , Ivan Schreter
IPC: G06F17/30
CPC classification number: G06F16/24561 , G06F16/213 , G06F16/221 , G06F16/24 , G06F16/2455 , G06F16/2456
Abstract: A system and method of query processing in a multi-level storage system having a unified table architecture. A query is received by a common query execution engine connected with the unified table architecture, the query specifying a data record. The common query execution engine performs a look-up for the data record based on the query at the first level storage structure. If the data record is not present at the first level storage structure, the common query execution engine performs separate look-ups in each of the second level storage structure and the main store.
Abstract translation: 具有统一表架构的多级存储系统中的查询处理系统和方法。 与统一表架构相连的通用查询执行引擎接收到查询,查询指定数据记录。 普通查询执行引擎根据第一级存储结构的查询执行数据记录的查找。 如果第一级存储结构中不存在数据记录,则公共查询执行引擎在第二级存储结构和主存储中的每一个中执行单独的查找。