[ale] Getting the next index of a table in mysql

[Chris Fowler]

I've attached a perl program where I hacked out a way to get the next
logical entry.  This program does not do the insert yet.


On Thu, 2005-06-09 at 08:25 -0400, Michael B. Trausch wrote:
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> James Sumners wrote:
> > It would be better to do the INSERT first and then get the number.
> > That way you can be sure that it is the correct number. But, "SELECT
> > pri_key_num + 1 FROM table ORDER BY pri_key_num DESC LIMIT 1;"
> > 
> 
> Also, note that this will only work if there are zero deletions from the
> table in question.  If you make a deletion in a table, and you don't
> re-order the table by pri_key_num, then eventually you will find that
> you're performing INSERTs that aren't any longer using the correct row
> ids, and you'll have gaps in numbering if you use any other method to
> add a number.
> 
> Checking the new Row ID after an insert is the only real way to go about it.
> 
> 	- Mike
> 
> - --
> Michael B. Trausch                                     fd0man at gmail.com
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