$dbh->rollback();
         die "update (and rolling back): ".$dbh->errstr;

[download]

Thanks Marshall for your insight and explanations. Blame me as that was actually my code :) Two points on this:

First, although I am aware and I think I understand the concept of grouping insert/updates for both performance and rollback benefits, I always have trouble to code that for particular DB (MySQL and SQLite are the two I use). The begin_work was complaining to me and so I commented it out as I saw (I think) some stack-overflow comment that this may be DB dependent.

Second, I disagree with dieing at any point in my programs and I look down on code which does that and forces me to try/catch/eval each of its calls instead of checking the error code that each function, IMO, should return (with reasonable exceptions of course). There has been a recent discussion of this here: Re^7: STDERR in Test Results and then here EyeBall stumps BodBall (Error Handling) and my input here Re^8: STDERR in Test Results (where I water down my vitriol so-to-speak).

So, yes, fine.

In reply to Re^3: SQL: Update column(s) value with extra WHERE by bliako
in thread SQL: Update column(s) value with extra WHERE by bliako

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.