I would like editor access to the wiki...

I would like editor access to the wiki, my username is jebarnard and I would like to modify:

https://wiki.postgresql.org/wiki/Luhn_algorithm

The math is incorrect for the luhn_generate_checkdigit function, it returns invalid values for 1, 10, 100, 1000 ....

FROM generate_series(0, ceil(log($1))::integer - 1) AS n

should be changed to:

FROM generate_series(0, floor(log($1))::integer) AS n

Thanks,

Joel Barnard
Luhn algorithm - PostgreSQL wiki<https://wiki.postgresql.org/wiki/Luhn_algorithm>
Luhn algorithm implementation by Craig Ringer in pure SQL (PostgreSQL function dialect, but should be easily adapted to other DBMSs). Note that this implementation is ...
wiki.postgresql.org