Seth Gordon wrote:

I thought I should check and see if anyone on this list has used Haskell to munge a ten-million-row database table, and if there are any particular gotchas I should watch out for.

Are you sure you want to target the data directly? Another approach, that might have a better chance of a quick win within your time frame, is to use Haskell to generate SQL code. That could still reduce the amount of code you maintain by hand. Regards, Tom