I am not sure about the the example you have given, (Where the first row object remains in scope when the second call is made) but in the general case they are likey to be different.

Once a row object goes out of scope perl will Garbage collect it. If you want it back again you need to do another find, and DBIx::Class will look in the database, and inflate the row into a fresh instance of the class.

As far as I know DBIC does no caching behind the scenes of infated rows. I dare say that the developers of DBIC consider this a feature, as otherwise you could find yourself holding a stale object if another user of the databse changes the row. In any case if DBIC was caching row objects it would need a memory management system with weak references to avoid using up all your memory when you iterate over the rows of a large table.

In reply to Re: DBIx::Class Object Caching by chrestomanci
in thread DBIx::Class Object Caching by Herkum

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.