is mysql_insert_id safe

[monomaniac21]

Hi all

With regard to mysql's mysql_insert_id function is it possible that the
query can return the insert id from another insert performed by a
another user of the database which occured after the initial insert by
the first user but b4 the insert_id part can be queried.
Regards

Marc

[Rik]

monomaniac21 wrote:

Hi all

With regard to mysql's mysql_insert_id function is it possible that
the query can return the insert id from another insert performed by a
another user of the database which occured after the initial insert by
the first user but b4 the insert_id part can be queried.

No, mysql_insert_id () in the same script always gets the value of the last
query performed by that specific script, not by other connections to the
database.

Grtz,
--
Rik Wasmus

[Karl Groves]

"monomaniac 21" <mc******@googl email.com> wrote in
news:11******** **************@ f6g2000cwb.goog legroups.com:

Hi all

With regard to mysql's mysql_insert_id function is it possible that the
query can return the insert id from another insert performed by a
another user of the database which occured after the initial insert by
the first user but b4 the insert_id part can be queried.

You won't have any problems if you're running it immediately after the
query.

--
Karl Groves
www.karlcore.com

[Gordon Burditt]

>> With regard to mysql's mysql_insert_id function is it possible that the

query can return the insert id from another insert performed by a
another user of the database which occured after the initial insert by
the first user but b4 the insert_id part can be queried.

You won't have any problems if you're running it immediately after the
query.

In the database world, there is no "immediatel y after". It's always
possible for someone else to get in a query between any two of
yours. It's up to locking (implicit or explicit) or transactions
to prevent bad effects on the data from this by delaying execution
of one until another finishes.

mysql_insert_id () returns the last insert id ON THIS CONNECTION.
So, as long as you keep the connection open (which probably won't
be beyond the processing of the PHP page: with persistent connections,
you are NOT guaranteed to get the same connection next time), you
can wait as long as you want to call mysql_insert_id ().

Gordon L. Burditt