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    DATA ACCESS METHOD, DEVICE AND SYSTEM
    1.
    发明公开
    DATA ACCESS METHOD, DEVICE AND SYSTEM 审中-公开

    公开(公告)号：EP3373159A1

    公开(公告)日：2018-09-12

    申请号：EP16877463.6

    申请日：2016-10-26

    申请人： Huawei Technologies Co., Ltd.

    发明人： CHEN, Wenjun

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30339 ,  G06F17/30 ,  G06F17/30427 ,  G06F17/30454 ,  G06F17/30466 ,  G06F17/30498 ,  G06F17/30557

    摘要： The present invention discloses a data access method, apparatus, and system, to resolve a technical problem that relatively good storage cannot be implemented in a current database. The method includes: receiving a data access request; determining an access type of a data table that is to be accessed according to the data access request, where the access type of the data table includes a physical data table type and an object data table type that is stored in a database in a form of metadata; and obtaining to-be-accessed data from the to-be-accessed data table according to the determined access type of the data table.

    METHOD AND DATABASE COMPUTER SYSTEM FOR PERFORMING A DATABASE QUERY USING A BITMAP INDEX
    2.
    发明公开
    METHOD AND DATABASE COMPUTER SYSTEM FOR PERFORMING A DATABASE QUERY USING A BITMAP INDEX 审中-公开
    使用位图索引执行数据库查询的方法和数据库计算机系统

    公开(公告)号：EP3289484A1

    公开(公告)日：2018-03-07

    申请号：EP16719086.7

    申请日：2016-04-28

    申请人： Parstream GmbH

    发明人： BIENERT, Jörg ,  HUMMEL, Michael ,  HEUSSER, Norbert

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30454 ,  G06F17/30324 ,  G06F17/30442 ,  G06F17/30489

    摘要： Method and apparatus for performing a database query using a bitmap index in a data-base having a plurality of bitmap vectors, the method comprising the steps of: upon receipt of a query containing a selection condition, creating a filter bitmap based on the query input; performing a bitmap scan for the filter bitmap in order to determine at least one value of an existing matching data-base entry; determining a bitmap of the determined at least one value; creating a filtered bitmap by combining the filter bitmap with the bitmap of the determined at least one value; determining all entries in the database matching the filtered bitmap; sub-tracting the filtered bitmap from the filter bitmap, thus creating a new filter bitmap; repeating the steps, starting with the step of performing a bitmap scan based on the new filter bitmap, until the step of sub-tracting results in an empty bitmap.

    VARIABLE VIRTUAL SPLIT DICTIONARY FOR SEARCH OPTIMIZATION
    4.
    发明公开
    VARIABLE VIRTUAL SPLIT DICTIONARY FOR SEARCH OPTIMIZATION 审中-公开
    VARIABLES，VIRTUELLES，GETEILTESWÖRTERBUCHZUR SUCHOPTIMIERUNG

    公开(公告)号：EP3076310A1

    公开(公告)日：2016-10-05

    申请号：EP16000744.9

    申请日：2016-03-30

    申请人： SAP SE

    发明人： Verma, Sudhir

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30454 ,  G06F17/30315 ,  G06F17/30486 ,  G06F17/30501

    摘要： Methods and system are disclosed that optimize attribute vectors to search for data. In one aspect, a reordering optimization model is executed to reorder the attribute vectors. The attribute vectors may include value identifiers associated with data. The attribute vectors are assigned priorities, sequence score corresponding to each attribute vector is computed and the attribute vectors are reordered based on the computed sequence score. The reordered attribute vectors are logically partitioned into attribute vector blocks by executing a partitioning optimization model. The attribute vector blocks may be generated upon executing the partitioning optimization model. The value identifiers in the attribute vector blocks may be rearranged to optimize the attribute vectors to search for data.

    摘要翻译： 公开了优化属性向量来搜索数据的方法和系统。 在一个方面，执行重新排序优化模型以重新排序属性向量。 属性向量可以包括与数据相关联的值标识符。 属性向量被分配优先级，计算对应于每个属性向量的序列分数，并且基于所计算的序列分数重新排序属性向量。 重新排序的属性向量通过执行分区优化模型在逻辑上分割成属性向量块。 可以在执行分区优化模型时生成属性向量块。 可以重新排列属性向量块中的值标识符，以优化属性向量来搜索数据。