Here's a shorter version of what I was trying to do: 
my $sql = "INSERT INTO table_name"
        . " (a, b, c)"
        . " VALUE (?, ?, ?)"
        . " ON DUPLICATE KEY"
        . " UPDATE field_three = ?";

my $sth = $dbh->prepare( $sql );

for my $entry ( keys %entries ) {

    $sth->execute( $entries{'a'}, $entries{'b'}, $entries{'b'} );

    my $id = $dbh->last_insert_id( undef, undef, undef, undef );

    # use $id to insert stuff in another table

}

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Where the id is an auto-increment column, and also the primary key.

The problem is that last_insert_id() not always gives me the right id. (concurrency? transaction issues?)

I actually tried doing a SELECT on the table right after that INSERT, but since I'm doing this inside a transaction, the SELECT clause returns nothing...

Any ideas on how to go around this? Am I missing something trivial?

Both DBI's and MySQL's documentation point to a few CAVEATS around last_insert_id()...

In reply to DBI and last_insert_id by cog

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