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Displaying posts with tag: failed alter table (reset)
Stopping a Runaway Rollback due to Failing Mass Import or ALTER TABLE

I ran into this the other day, and while the solution is documented in the manual, it was kind of buried, so I thought I’d mention it here (and hopefully make it easier for others searching for this in the future).

In this specific instance, one was running a huge LOAD DATA (10 hours into it) and had to terminate the LOAD DATA command.

Terminating the command is one thing, but preventing InnoDB from trying to undo the rows that were inserted is another.

In this case, the LOAD DATA will easily re-create the table in question, so the existing table can be “thrown out”, so to speak. This, of course, is a *critical* requirement for this operation (i.e., that you can easily re-create the table – either from a load, backup, dump, etc.).

Per the manual:

“If you know that a given table is causing a crash on rollback, you can drop it. You can also use this to stop a runaway rollback caused by a failing …

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