in reply to
Overflow of $DBI::rows
Sounds unlikely. I have absolutely no experience with Teradata and little with ODBC but I dare say if the variable overflows at 2^31 it's very likely to be an C-level integer. Moving to a 64bit-machine is not an option for you? Perhaps with this amount of data you'd benefit from it anyway. Other than that it's probably difficult to fix on 32bit platforms as larger values could be returned to Perl but would necessarily become inaccurate, which is probably worse than not being able to use them at all.