You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sp_sayhello.xo.go
    path of file: ./repos/xo/_examples/booktest/sqlserver
    
    the code of the file until where you have to start completion: package sqlserver

// Code generated by xo. DO NOT EDIT.

import (
	"context"
	"database/sql"
)

// SayHello calls the stored procedure 'booktest.say_hello(nvarchar)
    
func SayHello(ctx context.Context, db DB, name string) (string, error) {
	// call booktest.say_hello
	const sqlstr = `booktest.say_hello`
	// run
	var result string
	logf(sqlstr, name)
	if _, err := db.ExecContext(ctx, sqlstr, sql.Named("name", name), sql.Named("result", sql.Out{Dest: &result})); err != nil {
		return "", logerror(err)
	}
	return result, nil
}