How to view stored procedures in mysql

MySQL is an open source relational database management system, in which stored procedures are a set of precompiled SQL statements that are stored in the database for multiple calls. Reviewing stored procedures is an important task in database development and maintenance. This article will introduce how to view stored procedures in MySQL.

1. Use the SHOW PROCEDURE STATUS command to view stored procedures

The SHOW PROCEDURE STATUS command is used to view information about all stored procedures, including the name of the stored procedure, database, creator, creation time, etc. The command format is as follows:

SHOW PROCEDURE STATUS [LIKE 'pattern']

The LIKE clause is used to specify the name of the stored procedure to be viewed. Wildcards can be used, such as:

SHOW PROCEDURE STATUS LIKE 'proc%';

This will list all procedures starting with "proc" stored procedures. If no LIKE clause is specified, information about all stored procedures will be listed.

2. Use the SHOW CREATE PROCEDURE command to view the definition of the stored procedure

The SHOW CREATE PROCEDURE command is used to view the definition of the specified stored procedure. The command format is as follows:

SHOW CREATE PROCEDURE procedure_name

Among them, procedure_name specifies the name of the stored procedure to be viewed. For example:

SHOW CREATE PROCEDURE my_procedure;

This command will display the creation statement of the my_procedure stored procedure, including the stored procedure header information and the stored procedure body statement.

3. Use the INFORMATION_SCHEMA database to view stored procedure information

The INFORMATION_SCHEMA database is the metadatabase of MySQL, which contains metadata information of all databases, tables, columns, stored procedures, etc. in the system. You can use this database to view various information about the stored procedure, such as the name, parameters, return value type, etc. of the stored procedure.

The following is an example of using INFORMATION_SCHEMA to retrieve stored procedures:

1. View the names of all stored procedures

   SELECT routine_name FROM information_schema.routines WHERE routine_type = 'PROCEDURE';

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2. View the specified storage Parameter information of the process

   SELECT parameter_name, data_type FROM information_schema.parameters WHERE especific_name = 'my_procedure';

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3. View the return value type of the stored procedure

   SELECT return_data_type FROM information_schema.routines WHERE routine_name = 'my_procedure';

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Summary

View the stored procedure is MySQL database development For important tasks in maintenance and maintenance, you can use various commands and system tables to retrieve various information about stored procedures, including name, definition, parameters, return value type, etc. Learning how to view stored procedures can help database administrators better manage databases and improve database performance and reliability.

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