Alter table, requires at least 50% free memory?

I was updating a ndb table (drop column) which was already using about 75% of datamemory. I realized that as it was copying to temp table, it was eating more and more of the datamemory for this. Eventually it just runs out of datamemory with a table is full error and drops the update I was performing.

Is there any way around this without increasing the datamemory or doing a mysqldump and reimport?

Using mysql ndb-7.2.8

Thanks!

Marc