What are the characteristics of golang stored procedures?

Golang is a rapidly evolving programming language with high readability and reliability. It can handle large-scale applications and can support both concurrent and parallel processing. Golang is also very expressive in data storage, especially in the application of stored procedures.

Golang's stored procedure refers to a set of predefined SQL statements. These statements can be encapsulated into a unit and called, so that the program can achieve higher execution efficiency. Stored procedures have the following characteristics:

1. Standardization: Stored procedures are defined and used in function libraries. When a stored procedure is defined, other programs can use the procedure without rewriting the code.
2. Safety: The execution of stored procedures does not depend on external programs, which makes them more secure. Because both input and output data are processed inside the procedure, stored procedures can perform many security checks to protect the database.
3. Performance: Because stored procedures are compiled, optimized, and cached, they can improve program execution efficiency.

In Golang, stored procedures can be implemented through the following steps:

1. Create a stored procedure, which can be defined from the command line interface of the database library management system.
2. Access the stored procedure through the Golang program, call the stored procedure and provide the necessary parameters.

The following is an example of calling a stored procedure through a Golang program:

package main

import (
    "database/sql"
    "fmt"
    "log"

    _ "github.com/go-sql-driver/mysql"
)

func main() {
    db, err := sql.Open("mysql", "user:password@tcp(127.0.0.1:3306)/database")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    _, err = db.Exec("CREATE PROCEDURE GetEmployees() BEGIN SELECT * FROM employees; END;")
    if err != nil {
        log.Fatal(err)
    }

    rows, err := db.Query("CALL GetEmployees()")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()

    var employeeID int
    var employeeName string

    for rows.Next() {
        err = rows.Scan(&employeeID, &employeeName)
        if err != nil {
            log.Fatal(err)
        }
        fmt.Printf("Employee ID: %d, Name: %s\n", employeeID, employeeName)
    }

    err = rows.Err()
    if err != nil {
        log.Fatal(err)
    }
}

In this example, assume that we have created the employees table in the MySQL database, and in this table There is data. The first step in the program is to create a stored procedure called GetEmployees that will return all records in the employees table.

Then, we use the db.Query() method to call the stored procedure. This method returns a Rows object containing a set of records retrieved from the stored procedure. We loop through these records and output the ID and name of each employee.

This is the application of stored procedures in Golang. By using stored procedures, we can encapsulate multiple SQL statements in one unit, thereby improving the efficiency of the program. If you need to use a set of related SQL statements in the database, then stored procedures are a very good choice.

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