At 13:49 +0200 2001-06-26, Gunnar von Boehn wrote:
>Lets take a single row, integer value for holding the sequence:
>CREATE TABLE sequence(
> id int4;
>);
That works, though I would use a single table for all sequences, not
a new table per sequence.
The other solution would be to do check the table itself what the maximum is:
LOCK tables customer WRITE
SELECT MAX(id) FORM customer WHERE id < 10000; ## your first normal customer
INSERT INTO customer SET id=#new_id#, ...
UNLOCK TABLES
though MySQL's optimizer doesn't understand how to do find a ranged
maximum by checking the index on the ID, so it's not a fast solution
at present.
=> Hello MySQL developers: Please add that. Same for the equivalent
"... ORDER BY id DESC LIMIT 1"
--
Matthias Urlichs
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