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Bitmap indexing method and unit, and smart card

A bitmap index and index technology, applied in the field of database, can solve the problems of large amount of operation data and bitmap index occupying a lot of memory resources, so as to reduce the amount of data, narrow the range of bitmap index, and solve the data volume of bitmap index operation. big effect

Inactive Publication Date: 2011-05-11
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The embodiment of the present invention provides a bitmap indexing method, which solves the technical problems that the existing bitmap indexing method has a large amount of computing data and bitmap indexing operations occupy a lot of memory resources

Method used

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  • Bitmap indexing method and unit, and smart card
  • Bitmap indexing method and unit, and smart card
  • Bitmap indexing method and unit, and smart card

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0047] The embodiment of the present invention provides a bitmap indexing method, and also provides a bitmap indexing unit and a smart card.

[0048] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] The bitmap indexing method provided by the embodiment of the present invention solves the technical problems that the existing bitmap indexing method has a large amount of computing data and the bitmap indexing operation occupies a lot of memory resources.

[0050] Such as image 3 with Figure 4 As shown, the bitmap indexing method of the embodiment of the present invention includes the following steps:

[0051] S1, limiting the effective query area of ​​the target bit string;

[0052] In the embodiment of the present invention, S1 specifically includes the following steps:

[0053] a00. Determine the effective query area according to any one or combination of retrieval conditions, record classificatio...

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Abstract

The invention discloses a bitmap index method, a bitmap index unit and an intelligent card, which relate to the database technical field. The bitmap index method can solve the technical problems of a great amount of calculation data of the prior bitmap index method in the intelligent card and more occupied memory resources by the bitmap index operation. The bitmap index method comprises the following steps: establishing a bitmap index handle according to index commands, and limiting an effective inquiry region of each target bit string during operation by using the bitmap index handle; applying memory space matched with the effective inquiry region after establishment of the bitmap index handle; reading the effective inquiry region of one target bit string to the applied memory space; reading the effective inquiry region of the unoperational target bit string one by one to carry out a logical operation with the target bit string in the memory space, and saving the operation results in the memory space. The invention is mainly applied in the bitmap index.

Description

technical field [0001] The invention relates to the field of database technology, in particular to a database management system realized on an embedded chip of an existing basic operating system. Background technique [0002] With the continuous advancement of technology, smart card applications have gradually become an indispensable part of people's lives. With the continuous promotion and popularization of smart card applications, people's functional requirements for smart cards are becoming more and more diverse. [0003] The development of smart card hardware technology is changing with each passing day, and the on-chip operating system of smart cards has been continuously matured and perfected, so that the database technology applied to traditional computers can be extended to the smart card operating system, providing a brand-new platform for better and richer mobile data services. Realize the platform, and data search technology is one of the cores in database techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06K19/067
Inventor 高松叶新
Owner BEIJING WATCH DATA SYST
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