If you don't provide a hash of static_columns, then timestamps break

[ivanreese]

It seems like, perhaps, you should add a fallback value for rv or @static_columns before we reach this point: https://github.com/strydercorp/fast_inserter/blob/89be198b673391b06318d80574ebe6d84341deed/lib/fast_inserter/fast_inserter_base.rb#L138-L144

It looks like all of the specs provide values for static_columns. In my use case, all of the columns I wanted to insert were variable, so I wanted to just omit the static_columns option.