This example shows how to instrument sql queries in order to display the time that they consume package main import ( "context" "database/sql" "fmt" "time" "github.com/gchaincl/sqlhooks" "github.com/mattn/go-sqlite3" ) // Hooks satisfies the sqlhook.Hooks interface type Hooks struct {} // Before hook will print the query with it's args and return the context with the timestamp func (h *Hooks) Before(ctx context.Context, query string, args ...interface{}) (context.Context, error) { fmt.Printf("> %s %q", query, args) return context.WithValue(ctx, "begin", time.Now()), nil } // After hook will get the timestamp registered on the Before hook and print the elapsed time func (h *Hooks) After(ctx context.Context, query string, args ...interface{}) (context.Context, error) { begin := ctx.Value("begin").(time.Time) fmt.Printf(".