I don't think this has been stated yet, which surprises me because I saw it mentioned in the CB an hour ago:

The bind_param method is a method of statement handle objects. So is the execute method, as well as the fetchrow_array method. The prepare method is a database handle object method. So your code would be better written as:

my $sth = $database->prepare($query) or croak $database->errstr;
$sth->bind_param( ':user', $user ) or croak $sth->errstr;
$sth->bind_param( ':num', $num ) or croak $sth->errstr;
( $user_type, $user_num ) = $sth->fetchrow_array;

[download]

In your case, $db is holding a statement handle. But I think that's a confusing choice of variable name; it defies the convention demonstrated in the DBI documentation, and makes it hard to guess whether it represents a database handle (your $database variable), or a statement handle. That's just a style/maintainability issue. The big issue I see is using database handles to call statement-handle object methods. That's not going to do what you want.


Dave

In reply to Re: Fetchrow_array returns empty value by davido
in thread Fetchrow_array returns empty value by Anonymous Monk

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.