Monad-based persistent layer composite condition query method and storage medium

Abstract

The invention discloses a Monad-based persistent layer composite condition query method and a storage medium. At present, a persistent layer of most Java applications uses an ORM framework to eliminate the impedance mismatching phenomenon between an object-oriented language and a relational database, thereby enhancing development efficiency. However, a current mainstream ORM framework is provided.For example, problems exist in Mybatis, Hibernate and the like, so that the development efficiency is influenced. The problems include uncontrollable SQL, difficult optimization, excessive dependentfiles and the like. To overcome these disadvantages, the invention provides a persistent layer framework based on Mybatis. According to the framework, an SQL (Structured Query Language) controllable quick query function is realized by combining a Linq style on the basis of a Mybatis function; through the function, related files on which query depends can be reduced, meanwhile, the SQL file is automatically detected and generated to achieve controllability and optimization, the problem that SQL optimization is difficult due to excessive packaging of API is avoided, the development efficiency isimproved, and the development period is shortened.

Description

technical field [0001] The invention belongs to the field of computers, and in particular relates to a monad-based persistence layer composite condition query method and a storage medium. Background technique [0002] At present, with the rapid growth of the Internet scale, more and more enterprises pay more attention to the development speed of software applications in order to gain the upper hand in the fierce market competition. In the actual software development process, software applications need to frequently update the database In other words, the proportion of the workload of the database interaction code should not be underestimated, and software developers will spend a lot of time writing the database interaction code. [0003] Data exists in the form of objects in the application system, but in the database as tuples with relationships, so when interacting with the database in the application, it is necessary to convert the objects into relational data and operate...

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Problems solved by technology

[0010] 1) There are many files that need to be mapped, and each entity class will correspond to the corresponding SQL interface and XML file. At the same time, adding a method also needs to modify the SQL interface file and XML file at the same time. In the development stage, there is a lot of work to add methods frequently quantity

[0011] 2) It cannot adapt to the flexible query requirements of multi-condition combinations. The query operation may have multiple field combinations, and the fields may have different query methods, such as range query, equality query, fuzzy query, etc., so for an entity, the query There may be many ways. For an entity with n fields, if two fields are combined into one method, then there are possibilities. If there are any number of field combinations and the field query method is considered, there may be more

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