How can I implement connection pooling in Go SQL packages?

How can I implement connection pooling in Go SQL packages?

You can use the database/sql package in Go, which provides built-in support for connection pooling. First, you need to open a database connection using sql.Open(), and then you can configure the maximum number of open and idle connections.

What are the key functions I should use for managing the pool?

You should use SetMaxOpenConns(int) to set the maximum number of open connections, and SetMaxIdleConns(int) to set the maximum number of idle connections.

How do I handle errors when a connection fails?

You can check for errors when you attempt to open a connection or execute a query. Always handle errors gracefully to ensure your application can recover.

Can you give me a code example?

Sure! Here's a simple example:

package main

import (
    "database/sql"
    "log"
    _ "github.com/go-sql-driver/mysql"
)

func main() {
    db, err := sql.Open("mysql", "user:password@/dbname")
    if err != nil {
        log.Fatal(err)
    }
    db.SetMaxOpenConns(25)
    db.SetMaxIdleConns(25)
    // Use db...
}