On 15/06/2005 10:28 a.m., Kevin Burton wrote:
I've been thinking about this for a while now.
If you have an app that can compute a unique key (hashcode) and you have
a unique index it should be possible to just do an INSERT instead of a
SELECT first to see if the record doesn't exist and then an INSERT.
This should be 2x faster than the SELECT/INSERT combo right?
I'm not entirely clear what you're talking about, but you could also
have a look at INSERT IGNORE..., or INSERT... ON DUPLICATE KEY UPDATE,
or REPLACE INTO...:
http://dev.mysql.com/doc/mysql/en/insert.html
http://dev.mysql.com/doc/mysql/en/replace.html
-Simon
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