Hi,

I've a column in a mysql database that gets updated when it shouldn't have been. I've pasted the table specs and the relevant perl code here: 
# table specs
CREATE TABLE tasks (
      member_id MEDIUMINT UNSIGNED NOT NULL PRIMARY KEY,
      quota MEDIUMINT NOT NULL,
      logged TIMESTAMP NULL,
);

# perl code to decrease quota by 1

my $member_id = get_memberid();

my $sql = qq{ UPDATE tasks
   SET quota=quota-1
   WHERE member_id=?
};

# Assuming a connection via $dbh exists
$dbh->do($sql, undef, $member_id);

[download]

With the perl code above, 'quota' gets decremented by 1, which is correct, but 'logged' gets updated with the currect timestamp too, which is not what I intended.

Am I missing something?

Updated: Thanks! It makes sense now :)

In reply to DBI mysql question by kiat

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