I'm tried to add a column to the product table with a simple SQL statement and got an error. What i'm trying to do is add a features list to every product. I'd like to eventually, possibly turn this into a plug-in or add-on.

the SQL statement was this:
ALTER TABLE products ADD features_list VARCHAR(250);

the error i got was this:
Fatal error: Allowed memory size of 262144 bytes exhausted (tried to allocate 32 bytes) in /var/www/phpmyadmin/libraries/sqlparser.lib.php on line

anyone recommend what to do? i don't really understand the error.

thanks