John Meinel wrote:
> See my follow up post, which enables an index scan. On my system with
> 90k rows, it takes no apparent time.
> (0.000ms)
> John
> =:->
Confirmed. Hats off to you, the above some really wicked querying.
IIRC I posted the same question several months ago with no response and
had given up on it. I think your solution (smallest X1 not in X) is a
good candidate for general bits, so I'm passing this to varlena for
review :)
SELECT t1.id+1 as id_new FROM id_test t1
WHERE NOT EXISTS
(SELECT t2.id FROM id_test t2 WHERE t2.id = t1.id+1)
ORDER BY t1.id LIMIT 1;
Merlin