Well I guess cisco_netflow_log would be more accurate a name then... :-)
You sounded as if you would create a new table each day, and that would be a thing to think over.

#!/usr/bin/perl
my $test = "Relation '20030219' already exists";
print "Result: ", $test =~ /Relation\s'[0-9]*'\salready\sexists/, "\n"
+;
__END__
Result: 1
[download]

regards,
tomte