laravel calls stored procedure

In Laravel development, stored procedures are an important part of the database. It can help us better manage the database, improve query efficiency, and reduce problems in code logic and database connection volume. This article will explain how to call stored procedures in Laravel applications.

1. What is a stored procedure?

A stored procedure is a set of precompiled SQL statements that are saved in the database and called as a reusable procedure or function. Different from SQL statements, stored procedures include control logic and SQL statements, can accept parameters, return multiple values, and can also manipulate temporary tables, etc. Stored procedures can improve application performance and security, simplify application complexity, and reduce round-trip communication between the database and application.

2. Create a stored procedure

In MySQL, you need to use the CREATE PROCEDURE statement to create a stored procedure. The syntax is as follows:

CREATE PROCEDURE procedure_name ([IN | OUT | INOUT] parameter_name data_type [(length)],...)
[SQL语句]

Among them, procedure_name is the name of the stored procedure, and parameter_name represents Parameter name, data_type indicates parameter data type, and length indicates data length. Parameters can be IN, which means input parameters (can only be used when entering stored procedures), OUT, which means output parameters (data can only be obtained through stored procedures), and INOUT, which can be both input and output.

For example, we create a stored procedure getUserInfo to obtain user information. The code is as follows:

CREATE PROCEDURE getUserInfo(IN userId INT)
BEGIN
    SELECT * FROM users WHERE id = userId;
END

Through this stored procedure, we can obtain the user information of the specified id.

3. Call the stored procedure

In Laravel, we can use the DB facade to provide the method DB::select to execute the stored procedure, for example:

$result = DB::select("CALL getUserInfo(1)");

Here we get Taking the user information with id 1 as an example, the created getUserInfo stored procedure is called through the CALL statement. After the call is successful, $result will return an object containing user information.

If you need to pass parameters, you can use placeholders, for example:

$result = DB::select("CALL getUserInfo(?)", [1]);

The placeholder here is a question mark, and the second parameter is in the form of an array, and you need to assign a value to the question mark accordingly.

It is worth noting that some stored procedures need to return a result set, while some only need to perform update or insert operations. The method DB::statement provided through the DB facade can be called directly, for example:

DB::statement("CALL updateUser(1, 'John')");

Here we call the updateUser stored procedure to update the user information with id 1, and there is no result set returned.

4. Use ORM to call stored procedures

In addition to calling stored procedures through the DB facade, Laravel's ORM also provides a method to call stored procedures. The syntax is as follows:

$results = User::hydrate(
    DB::select("CALL getUserInfo(?)", array($id))
);

where , User represents the user table. This method is similar to the DB::select method. It calls the getUserInfo stored procedure by passing parameters, and stores the results in the model through the hydrate method.

Summary

Laravel provides convenient methods to call stored procedures. Through the DB facade and ORM, you can directly call the created stored procedure through the CALL statement and obtain the returned result set or update data. Stored procedures can help us better manage the database, improve the performance and security of the application, and also simplify the complexity of the application.

The above is the detailed content of laravel calls stored procedure. For more information, please follow other related articles on the PHP Chinese website!