Storage medium-oriented query method and device, medium, equipment and system

A storage medium and query method technology, which is applied in the fields of storage medium-oriented query methods, media, devices, equipment and systems, and can solve problems such as inconvenience in data query work.

Pending Publication Date: 2022-01-07
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the storage media may support the SQL query language, and some may not support it, which brings great inconvenience to the data query work inside the data system

Method used

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  • Storage medium-oriented query method and device, medium, equipment and system
  • Storage medium-oriented query method and device, medium, equipment and system
  • Storage medium-oriented query method and device, medium, equipment and system

Examples

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specific example

[0062] The SQL statement issued by the user is as follows:

[0063]

[0064]

[0065] Then the processing flow of this program is:

[0066] The SQL statement first enters the SQL processing layer, and after the SQL optimization module optimizes the SQL, the optimized SQL is:

[0067]

[0068] The optimized SQL is parsed into a JSON string by the data exchange module, as follows:

[0069]

[0070]

[0071]

[0072]

[0073] Through the above two steps 1) and 2), the process of simplifying the processing of SQL query statements and converting them into JSON strings can be realized. Among them, it is known that there is an index named vehicle in the full-text search engine elasticsearch, and the field information contained in the index is shown in the following table:

[0074] Field Name Description record_id ID of this record vehicle_color vehicle color plate_code License plate number plate_color license plate color ...

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Abstract

The embodiment of the invention discloses a storage medium-oriented query method and device, a medium, equipment and a system. The method comprises the steps of receiving an SQL query statement, simpliying the SQL query statement, and obtaining an optimized query statement; determining a target storage medium of the optimized query statement according to the optimized query statement; calling a data interface of the target storage medium, identifying the optimized query statement, determining a query target, and packaging the query target into a data query structure supported by the target storage medium; and performing information query of the query target for a target storage medium. By executing the scheme, the effect that any data storage medium in the data system supports the SQL query language can be achieved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of video processing, and in particular to a storage medium-oriented query method, device, medium, equipment, and system. Background technique [0002] With the rapid development of science and technology and the rapid development of big data, the types of data systems are gradually increasing. Due to the different types of databases, the language forms supported by the databases are also different. For developers, due to the widespread popularity of relational databases, most software developers are quite familiar with SQL (Structured Query Language, Structured Query Language). For a big data system, it may include various types of data storage media. Some of the storage media may support the SQL query language, and some may not, which brings great inconvenience to the data query work inside the data system. Therefore, how to unify the query mode of the data system has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/242G06F16/2453
CPCG06F16/2433G06F16/2453
Inventor 王修梓徐陇浙
Owner ZHEJIANG UNIVIEW TECH CO LTD
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