losing mysql connection during cron job

>
The script cycle is, symbolically:
>
foreach (recipients as batch)
{
mail() using batch of recipients;
mysql_query() update table;
sleep(60);
}
final mysql_query() update table as complete;
>
>
why don't you edit your code?

foreach (recipients as batch)
{
mail() using batch of recipients;
mysql_query() update table;
if(mysql_errno()==ERRR_CDE_YU_GET){
mysql_connect();
mysql_select_db();
}
sleep(60);
}