Mike, The documentation at http://dev.mysql.com/doc/refman/5.0/en/update.html explains that MySQL is aware of the fact that it only needs to update different values -- for instance, it returns only the # of rows changed, not the # of rows looked at. Given that, I will extrapolate that MySQL is not going to re-work an index unless it actually changes a value.
-Sheeri On 11/21/05, Mike OK <[EMAIL PROTECTED]> wrote: > Hi > > I was wondering how the index process worked internally for UPDATE > statements. If I was to "set" a value for a column with the UPDATE statement > but the value was the same, would MySQL re-work the index?? I can check for > data change for each column inside of my code before UPDATE but want to make > sure I need to before going ahead. Mike > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
