Hi, Eric, Thanks a lot for the GREAT explanation! This perfectly answers my question. We can close the threads now :-)
Best, T On Sat, Nov 24, 2012 at 8:53 AM, Eric Bergen <eric.ber...@gmail.com> wrote: > Yes, the missing piece of the puzzle is that configuration files are > turned into command line arguments internally. Programs will parse > configuration files and place them at the beginning of the array for > command line arguments. They are made case sensitive because they are > turned into command line arguments. So the basic process is read all > the configuration files in order of precedence into the beginning of > the command line array. Then send this array to the command line > handling code. This is also how argument precedence works. As the > array is walked through options will override previous options so > things passed on the command line are at the end and override options > in the config file. > > On Fri, Nov 23, 2012 at 10:08 PM, Tianyin Xu <t...@cs.ucsd.edu> wrote: > > Dear Eric, > > > > Thanks a lot for the explanation of argument directives! The concerns are > > very considerate. > > > > Actually, what I'm curious about is the configuration directives in the > > configuration file, i.e., my.cnf. To my experience, MySQL is the very few > > software who treats these directives in a case sensitive manner. > > > > The directives in the configuration file is different from the arguments, > > because we don't have something like --port and -P. So, a directive like > > "Port" clearly indicates that the user specifies "port" (exactly as you > > said). And this's the reason that most apps do not differentiate them. > > > > Could you please explain about the directives in the configuration file? > > > > Thanks a lot! > > > > Happy Thanksgiving!! > > Tianyin > > > > > > > > On Fri, Nov 23, 2012 at 4:20 PM, Eric Bergen <eric.ber...@gmail.com> > wrote: > >> > >> Anger and OS religious arguments the real answer is that is just how > >> the option parsing code works. It doesn't always have to make sense. > >> There are short and long args to programs. For example on the mysql > >> client there is --port or -P and --pasword or -p. The short options > >> have to be case sensitive because -P and -p mean different things. The > >> short options are case sensitive so the long options may as well be. > >> It keeps things simpler. Who wants to write --Port when --port means > >> not hitting the shift key? > >> > >> There are a few exceptions to this. The option comparison treats _ and > >> - as the same. I realize that isn't case but it just shows the > >> matching isn't exact. So --show_warnings is valid. On the other side > >> of the equal sign comparisons for true, on, false, and off are done > >> case insensitive. So --show_warnings=FaLse is valid but > >> --show_warningS=TruE isn't. > >> > >> If you want to be even more confused consider that mysql allows > >> partial argument names. You don't have to type out the full long arg > >> as long as you type enough that it only matches one option. For > >> example mysql --so is enough to mean socket but mysql --s isn't > >> because it can't be distinguished from 'show' variables. This gets > >> confusing with things like b. mysql --b is batch mode. So is mysql -B > >> but mysql -b is no beep. Confused yet? > >> > >> On Sun, Nov 18, 2012 at 6:42 PM, Tianyin Xu <t...@cs.ucsd.edu> wrote: > >> > On Sun, Nov 18, 2012 at 6:13 PM, Reindl Harald > >> > <h.rei...@thelounge.net>wrote: > >> > > >> >> > >> >> > >> >> Am 19.11.2012 02:07, schrieb Tianyin Xu: > >> >> > You are saying as long as admins are careful, there's no > >> >> misconfiguration? > >> >> > But why misconfigurations are so pervasive? > >> >> > Simply because the admins are not careful enough? > >> >> > >> >> yes > >> >> > >> >> > >> > That means not only I'm dummy, and that's means you should take care > the > >> > system configuration design if many people are careless. > >> > > >> > > >> > > >> >> > I apologize for my lack of respect. I don't know what's your stuff, > >> >> > but > >> >> > I guess they'll be more popular if you make them more friendly. > >> >> > >> >> it does not need to be more popular > >> >> it is better not to be too popular but working clean and safe > >> >> > >> >> careless working these days means usually also not care > >> >> about security which is not acceptable htese days and i > >> >> know a lot of crap out there which is more popluar like > >> >> my work but with crappy quality and terrible insecure > >> >> > >> >> see all this CMS sytems out there writing hundrets of > >> >> warnings each request with error_reporting E_STRICT > >> >> while my whole source code runs clean i know who is right > >> >> > >> >> really: > >> >> if you find it useful to complain why a configuration is > >> >> case-sensitive instead accept it and correct your fault > >> >> you are doing the wrong job > >> >> > >> >> > >> > I'm complaining nothing. I just curious about the configuration and > want > >> > to > >> > know you developers' thinking. I apologize if I gave you the > impression > >> > of > >> > complaining by asking questions. > >> > > >> > Basically, I'm new to MySQL and find MySQL really take care about lots > >> > of > >> > things to give users an easy job. For example, the unit, the > enumeration > >> > options, all are case insensitive -- "512K" and "512k" means the same > >> > size, > >> > "MIXED" and "mixed" means the same option, etc. Having such > impression, > >> > when MySQL tells me 'Port' is unknown, it did take me some time to > >> > figure > >> > it out. Maybe simply because all the other servers I used like > >> > PostgreSQL, > >> > httpd, etc are case insensitive. That's the whole story, and that's > why > >> > I > >> > ask on the forum, being curious about the reason. > >> > > >> > It's fine that you told me it's simply because you developers assume > >> > nobody > >> > "came to the idea write options > >> > not EXACTLY like they are in the documentation", so you simply do not > >> > want > >> > to do it. But I do not buy this, because MySQL developers do take > care a > >> > lot of things (as unit and options I mentioned). > >> > > >> > T > >> > > >> > > >> > -- > >> > Tianyin XU, > >> > http://cseweb.ucsd.edu/~tixu/ > >> > >> > >> > >> -- > >> Eric Bergen > >> eric.ber...@gmail.com > >> http://www.ebergen.net > > > > > > > > > > -- > > Tianyin XU, > > http://cseweb.ucsd.edu/~tixu/ > > > > -- > Eric Bergen > eric.ber...@gmail.com > http://www.ebergen.net > -- Tianyin XU, http://cseweb.ucsd.edu/~tixu/
