Using context for timeouts in Go with pgx allows you to manage database queries effectively, ensuring they do not hang indefinitely. This is particularly useful in production environments where database latency can cause significant problems.
package main
import (
"context"
"fmt"
"github.com/jackc/pgx/v4"
"time"
)
func main() {
// Set a timeout for the database operation
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
// Connect to the database
conn, err := pgx.Connect(ctx, "postgres://user:password@localhost:5432/mydb")
if err != nil {
fmt.Println("Unable to connect to database:", err)
return
}
defer conn.Close(ctx)
// Execute a query with timeout context
var greeting string
err = conn.QueryRow(ctx, "SELECT 'Hello, World!'").Scan(&greeting)
if err != nil {
fmt.Println("Query failed:", err)
return
}
fmt.Println(greeting) // Outputs: Hello, World!
}
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