"I always do that unless I am overly confident. Seriously, I do test them."

"I can't see the problem"

TABLE_SCHEMA=DATABASE()ANDTABLE_NAME='users'
[download]

If you can't see the problem by just reading what you have, test your SQL outside of perl. Perl isn't prone to making things up randomly. Consider using an editor that supports Syntax_highlighting to give you an additional visual queue.