How to view mysql stored procedures

MySQL is currently one of the most widely used relational database management systems. It provides users with many powerful database operations, of which stored procedures are an important part of MySQL. Stored procedures package a sequence of SQL statements into a single unit for easy reuse and invocation. In this article, we'll explain how to view MySQL's stored procedures.

MySQL stored procedure syntax

Before we start to discuss how to view MySQL stored procedures, let us first review the syntax of stored procedures:

CREATE [DEFINER = { user | CURRENT_USER }] PROCEDURE sp_name ([proc_parameter[,...]])
    [characteristic ...] routine_body

Among them,

• DEFINER: Specify the creator of the stored procedure. If not specified, the current user will be used.
• sp_name: The name of the stored procedure, conforming to the naming convention of MySQL.
• proc_parameter: The parameter list of the stored procedure, in the format of parameter name type.
• characteristic: Optional, used to specify the characteristics of the stored procedure, such as language, security, etc.
• routine_body: The body of the stored procedure, that is, the code block containing a series of SQL statements.

Methods to view MySQL stored procedures

When we need to understand the stored procedures in MySQL, we can use the following methods to view and query:

Method 1: Use the SHOW PROCEDURE STATUS command

You can use the SHOW PROCEDURE STATUS command to query the detailed information of all stored procedures in the MySQL database, including the stored procedure name, creator, creation time, status, etc.

Sample code:

SHOW PROCEDURE STATUS;

Executing the above code will return detailed information of all stored procedures.

Method 2: Use the SHOW CREATE PROCEDURE command

You can use the SHOW CREATE PROCEDURE command to query the detailed information of the specified stored procedure, including the stored procedure name, creator, creation time, parameters, comments, returns Worth waiting.

Sample code:

SHOW CREATE PROCEDURE sp_name;

Executing the above code will return detailed information of the specified stored procedure.

Method 3: Use the INFORMATION_SCHEMA system table

MySQL provides the INFORMATION_SCHEMA system table, which can query the metadata information of all databases, tables, views and stored procedures in the current MySQL server.

You can obtain the detailed information of the stored procedure by querying the ROUTINES table under INFORMATION_SCHEMA, including the stored procedure name, creator, creation time, parameters, comments, return values, etc.

Sample code:

SELECT ROUTINE_NAME, ROUTINE_DEFINITION, CREATED, LAST_ALTERED, ROUTINE_COMMENT 
FROM INFORMATION_SCHEMA.ROUTINES 
WHERE ROUTINE_TYPE = 'PROCEDURE' AND ROUTINE_SCHEMA = 'database_name';

Executing the above code will return detailed information of all stored procedures in the specified database.

Note: When using INFORMATION_SCHEMA to query the stored procedure, you need to ensure that you have sufficient permissions, otherwise an access denial exception will be thrown.

Conclusion

MySQL's stored procedure is a very practical function that can package a series of SQL statements into an independent unit for easy reuse and calling. When doing database maintenance and development, knowing how to view MySQL's stored procedures will be of great benefit and can help developers better understand and operate stored procedures. The above introduces three methods of viewing MySQL stored procedures. Readers can choose according to actual needs.

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