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Think about Loose Coupling

Re^2: Deriving a class from DBI.

by clueless newbie (Chaplain)
on Mar 23, 2010 at 18:14 UTC ( #830358=note: print w/replies, xml ) Need Help??

in reply to Re: Deriving a class from DBI.
in thread Deriving a class from DBI.

This points out why my attempts failed! Three classes not just one!

Thank you, ikegami, thank you!

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Re^3: Deriving a class from DBI.
by ikegami (Pope) on Mar 23, 2010 at 20:32 UTC

    Database handles and statement handles have different methods, so they are two different classes (::db and ::st). DBI itself provides global static methods. There's a fourth class (::dr) for database drivers.

    DBI determines the name of the database handle class and the statement handle class based on the package used to create the connection ($pkg->connect), so there's no need to tell DBI about your ::db and ::st class. On the flip side, you need to create all three subclasses even if you only want to subclass one.

      Found the documentation, thank you, here.

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[Corion]: Maybe doing a double-fork (daemonizing) can make go that information away, but maybe not
[Corion]: But I think my knowledge of unix/Linux datastructures is several decades out of date, so I don't really know what information it keeps on processes
[oiskuu]: The useful bits that relate to your process can be found under /proc/self. What information are you thinking of? Tty name?
[tye]: I just daemonized and getlogin() still knew who I had been.
[tye]: perhaps loginuid ? Not that I concede that something not being in /proc means it is not useful.
[Corion]: tye: That's really interesting, but maybe it is because getlogin() returns the name, or the uid, so if that user has been replaced by another user with the same uid in the meantime, that's no problem to the system...

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