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This article mainly introduces the advantages and disadvantages of MySQL stored procedures, the article is very detailed, has a certain reference value, interested friends must read it!

A stored procedure (Stored Procedure) is a database object that stores a complex program in a database for external programs to call; it is a set of SQL statements that are compiled and stored in the database in order to complete a specific function, and the user invokes and executes it by specifying the name of the stored procedure and giving parameters (if the stored procedure has parameters).

A stored procedure is a programmable function that is created and saved in the database. It can consist of SQL statements and some special control structures. Stored procedures are useful when you want to execute the same function on different applications or platforms, or to encapsulate specific functions. The stored procedure in the database can be regarded as a simulation of the object-oriented method in programming. It allows you to control how data is accessed.

The idea of stored procedure is very simple, which is code encapsulation and reuse at the language level of database SQL; it is supported from MySQL version 5.0.

Advantages and disadvantages of stored procedures:

1. Advantages

● stored procedures enhance the functionality and flexibility of the SQL language. The stored procedure can be written with flow control statements, which has strong flexibility and can complete complex judgments and more complex operations.

● stored procedures allow standard components to be programmatic. After a stored procedure is created, it can be called multiple times in the program without having to rewrite the SQL statement of the stored procedure. And database professionals can modify the stored procedure at any time, which has no effect on the application source code.

● stored procedures can achieve faster execution speed. If an operation contains a large amount of Transaction-SQL code or is executed multiple times separately, the stored procedure executes much faster than batch processing. Because the stored procedure is precompiled. When a stored procedure is run for the first time, the optimizer analyzes and optimizes it, and gives the execution plan that is eventually stored in the system table. Batch Transaction-SQL statements are compiled and optimized each time they are run, which is relatively slow.

● stored procedures can reduce network traffic. For the operation of the same database object (such as query, modification), if the Transaction-SQL statement involved in this operation is organized into a stored procedure, then when the stored procedure is called on the client computer, only the calling statement is transmitted in the network, thus greatly increasing the network traffic and reducing the network load.

● stored procedures can be fully utilized as a security mechanism. By restricting the permissions of a stored procedure, the system administrator can restrict the access to the corresponding data, avoid the access of unauthorized users to the data, and ensure the security of the data.

2. Shortcomings

● stored procedures are often customized on specific databases because of the different programming languages supported. When switching to another vendor's database system, you need to rewrite the original stored procedure.

The performance tuning and writing of ● stored procedures are limited by various database systems.

These are all the contents of the article "what are the advantages and disadvantages of MySQL stored procedures?" Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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