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36 results about "Schema transformation" patented technology

OLAP query processing method based on array storage and vector processing

The invention discloses an OLAP query processing method based on array storage and vector processing. In the method, array subscript mapping is carried out on major keys and foreign keys according to referential integrity constraint in a data warehouse model, the major keys of a dimension table and the foreign keys of a fact table are directly mapped to be array subscript addresses, the complex model is converted into a virtual materialized table, and a unified data access view is provided for different queries. The OLAP query is simplified to be three stages of predicate processing, grouping processing and gathering processing. In the stage of predicate processing, selection vectors are used for processing a selection result, on the fact table, of a plurality of predicates many times; in the stage of grouping processing, grouping vectors are used for distributing grouping array subscripts for each fact table record for meeting the predicate condition; in the stage of gathering processing, gathering vectors are used for providing an aggregator based on an array for an aggregate function. The OLAP query processing method based on array storage and vector processing simplifies the OLAP query processing process under a complex mode, eliminates the connection operation between the tables, and improves the code execution efficiency when the OLAP query processing is carried out.
Owner:RENMIN UNIVERSITY OF CHINA

Business data distribution server and business data distribution method thereof

ActiveCN103152386ASave storage spaceBusiness request savingsTransmissionDistribution methodData needs
The invention discloses a business data distribution server and a business data distribution method of the business data distribution server. The method comprises: when a server monitors that the concurrent number of a service request exceeds first threshold value, wherein a processing mode of the service request is a first processing mode, business data need to be distributed of an intelligent terminal which is referred by a business distribution strategy is confirmed according to the pre-formulated business distribution strategy which aims at the business request, attribute information of the intelligent terminal and attribute information of the business data need to be distributed of the intelligent terminal are stored correspondingly; and then, the processing mode of the business request is changed from the first processing mode to a second processing mode. Due to the fact that a large amount of business requests of the first processing mode can save a lot of memory spaces, when the concurrent number of the service request exceeds the first threshold value is monitored, the business request is changed to a business request of the second processing mode, the server can directly search the business data which need to be distributed and the business data are fed back to the intelligent terminal, and therefore the business requests of users can be responded timely.
Owner:JUHAOKAN TECH CO LTD
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