Here's a minimal subclass of DBI that illustrates how to subclass and adds interpolated binds to errors (i.e. it replaces SQL placeholders with the bind values). This isn't necessarily how your DBMS "sees" the statement, but it does give you a cut-and-pasteable approximation.

update Added Corion's fix to support questions marks in the bind values. 

package MyDBI;
use base qw(DBI);

package MyDBI::db;
use base qw(DBI::db);

package MyDBI::st;
use base qw(DBI::st);

sub execute {
    my($sth,@binds)=@_;
    my $rv = eval { $sth->SUPER::execute(@binds) };
    return $rv unless $@;
    my $errmsg = $sth->errstr;
    my $err    = $sth->err   ;
    my $stmt = $sth->{Statement};
    @binds = map {
        $sth->{Database}->quote($_) 
        unless DBI::looks_like_number($_);
        $_;
    } @binds;
    $stmt =~ s/\?/shift @binds/eg;
    return $sth->set_err(
         $err,
         sprintf "Execution Error: %s\nReconstructed SQL=\n<\n%s\n>\n"
               , $errmsg, $stmt
    );
}
1;

[download]

In reply to Interpolate binds into SQL on error - DBI subclassing by jZed

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.