batch bulk insert gaps

[Gabilabrebi]

When using batch to bulk insert, gaps in AUTO_INCREMENT IDs are created when reaching 50+ inserts even with innodb_autoinc_lock_mode set to 1 (consecutive)

The mySQL, documentation says :

With innodb_autoinc_lock_mode set to 0 (“traditional”) or 1 (“consecutive”), the auto-increment values generated by any given statement are consecutive, without gaps, because the table-level AUTO-INC lock is held until the end of the statement, and only one such statement can execute at a time.

So I'm not sure that's intended. Due to the fact that insertId, only return one ID, i think it's very important to not have gaps in IDs so we can deduce inserted ones.

[rusher]

Actually I'm not sure recreate the insert ids is the way to go.
If ID's are needed, better to disable bulk, setting option bulk to false. This will permit to retrieve all id's, even if slower (this is still faster than normal INSERT * number of bunch of parameter, because of pipelining).
In the near futur, this will be permitted with https://jira.mariadb.org/browse/MDEV-30366