driver/driver.go
func (c *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (r driver.Result, err error) {
	if c.session.IsBad() {
		return nil, driver.ErrBadConn
	}

	if len(args) != 0 {
		return nil, driver.ErrSkip //fast path not possible (prepare needed)
	}

	sqltrace.Traceln(query)

	done := make(chan struct{})
	go func() {
		r, err = c.session.ExecDirect(query)
		close(done)
	}()

	select {
	case <-ctx.Done():
		return nil, ctx.Err()
	case <-done:
		return r, err
	}
}
func (c *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (r driver.Result, err error) {
	if c.session.IsBad() {
		return nil, driver.ErrBadConn
	}

	if len(args) != 0 {
		return nil, driver.ErrSkip //fast path not possible (prepare needed)
	}

	sqltrace.Traceln(query)

	done := make(chan struct{})
	go func() {
		r, err = c.session.ExecDirect(query)
		close(done)
	}()

	select {
	case <-ctx.Done():
		return nil, ctx.Err()
	case <-done:
		return r, err
	}
}
// ExecContext implements the database/sql/driver/ExecerContext interface.