The function you need is LAST_INSERT_ID().
Immediately after the insert,
execute a SELECT LAST_INSERT_ID() as if it were a normal
select statement in DBI. The value you retreive will be the
auto_increment column value of your recent insert.
This is covered in the DuBois book (pp. 93, 170, 547)
and in the MySQL online docs under 'Miscellaneous Functions'.
(Note that mysql_insert_id() is part of the C API
and is not directly accessable from Perl.)
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